According to documents filed last week in Taney County Circuit Court, Brian Woltersdorf admits to driving while under the influence when he collided with another vehicle killing one person and seriously injuring four others
Woltersdorf is sentenced to 15 years on the charges of DWI resulting in the death of a person and four other charges for the people injured.
Woltersdorf was driving on Highway 376 near the Ruth and Paul Henning State Forest when he collided with another vehicle after losing control on a curve.
A complete recap of the incident can be found on the Branson Tri-Lakes News Website.
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Described by the director as a dark fantasy and sitcom
Haunted is yet to be another local sensation at Lilydale Athenaeum Theatre
“It’s a bit of smoke and mirrors,” director Nicholas Ryan says with “a lot of different twists and turns.”
A play that incorporates elements of the historical poet and playwright
Haunted revolves around the story of Nigel Burke
a neurotic and “agoraphobic” character with “a lot of fears and phobias.”
“It runs at a good pace,” the director says
more of a situation comedy than a comedy comedy.”
The director speaks about the theatrical elements used to create a ‘ghostly’ and illusory feel onstage
stating he “must take the audience’s sightline away from what’s happening
“It’s enjoyable and it’s a good story line with different plot twists to it
Embarking upon the theatrical journey once again
says the show is “not a heavy-set drama or anything
where these very raw emotions have to be bubbling at the surface constantly,” rather “on the outset
Woltersdorf concurred with the director and praises the play’s technical aspects
which enhances the ghostly effect of Lord Byron and the overall mood of the play
“With everything we’ve put together with all of the guys in terms of the set design and what they’re doing to their technical elements in order to
I think it’ll be a lot of fun for the audience when he does make that appearance,” he says
“And that’s probably the most technical part of the whole show
The lead actor discusses his attraction to the role of Nigel
as well as describing the character’s depth and complexity which adds to the full scope of the story and “how the narrative is weaved.”
just the scale of what is involved as well as where the characters are introduced and it’s almost me and another person sort of on rotation,” Woltersdorf says
“I think people will just enjoy having a famous literary figure present before that time
and the playful eccentricities that he exuded through his lifetime
“The more I’ve been able to read it and discover the character
the more nuanced and more interesting I find him
and there’s always something new to find.”
Woltersdorf reveals how he thrived upon the challenge of quickly shifting focus between different characters
stating there “is a constant relationship change that you have with everyone that you’re communicating with onstage.”
“I thought it was a really fun little test of my own skill in how you have to quickly shift your focus
depending on who it is that you’re talking to
the challenge of doing that was probably the most appealing thing to me.”
Woltersdorf is confident the audience will delight in these shifting aspects of the show and in “the dynamic relationships” which consist of “a constant rotation of characters on stage.”
“I think people will enjoy just seeing those relationships and how each of the conversations and relationships do intertwine with the other relationships,” he says
director Nicholas Ryan highlights the work that has been put into “building up all the characters” to prepare them for the eventful and exciting storyline
and they’re all different,” the director says
Woltersdorf wishes to pay homage to the collaborative effort
as well as the professional and creative dedication of the team
and the collaboration he’s had with all of the people behind the scenes has really brought it to life to help suspend the audience’s disbelief,” he says
It’s a really beautiful combination of collaboration
where everyone has had a chance to express themselves in a way that helps serve the story
I think there’s this really beautiful connection between everyone that’s been working on it
and the result on the stage is quite exceptional.”
Don’t miss the second season of this phantasmic
The season begins on Thursday 24 April and runs to Saturday 10 May at Lilydale Athenaeum Theatre
By Metro Report International2024-04-18T04:58:00+01:00
GERMANY: Modertrans has delivered the first Moderus Gamma LF 10 AC BD tram vehicle to Schöneicher–Rüdersdorf Strassenbahn
SRS awarded Modertrans a contract in February 2022 for the supply of three low-floor trams for use on Route 87, which connects Berlin-Rahnsdorf S-Bahn station with Woltersdorf, just outside Berlin
The 5·6 km standard gauge line is currently operated using 60-year old Gotha vehicles
The Moderus Gamma LF 10 AC BD low-floor trams are a development of the Gamma LF 05 AC cars in service in Poznań
Battery packs charged using regenerating braking energy will enable the trams to operate for short distances in the event of a power cut
POLAND: Tramwaje Śląskie has awarded Pesa Bydgoszcz and Modertrans Poznań contracts to supply 50 trams worth 777m zloty
All will be low-floor and equipped with air-conditioning
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POLAND: The first of 30 Moderus Gamma LF 04 AC BD trams that operator MPK Poznań’s in-house manufacturer Modertrans is supplying has arrived at Franowo depot
POLAND: The first single-section Moderus Gamma LF 05 AC tram built by local supplier Modertrans entered service on Route 99 in Poznań on September 18
Operator MPK Poznań and Modertrans believe it is the first single-section
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USC student Nick Woltersdorf has used July 16 to focus on the things that matter to him
That day happens to be the anniversary of his mother’s death – but after last year
who is a Film and Production student at USC’s School of Cinematic Arts (SCA)
decided to head to Malibu to swim - something he’s been doing since childhood
but I’d consider myself a pretty good swimmer,” Woltersdorf said
But when a rogue wave hit while he was swimming near the shore
“It felt like I was hit with a sledgehammer and there was just this crazy surge of adrenaline,” Woltersdorf said
‘maybe I’m just really concussed,’ but something just did not feel right.”
A break in the average person’s C7 vertebra could lead to complete paralysis or even death – but miraculously
Sheer adrenaline meant that he was able to drive home himself
He only went to the hospital the following morning
when his friends urged him to see a doctor
“The surgeon said that it [my vertebra] was as if someone had put a sugar cube in their fist
and shattered it into 20 pieces,” Woltersdorf said
But a surgery to repair his vertebrae when he re-injured his neck during the Fall 2019 semester proved futile
“I knocked my neck getting out of my hatchback and it was honestly the perfect sh*tstorm,” Woltersdorf said
he was left with a three-inch tear in his esophagus and an injured spinal cord
that immobilizes his neck and shoulders for the duration of his second stint in the hospital
But he hasn’t left the hospital or swallowed food since August 2019
He’s kept alive through what he describes as a “Soylent-like” solution that he’s fed through an IV
who is part of Woltersdorf’s SCA cohort - a group of students in the same year and program - met him his sophomore year while they were crewing on a student film and was immediately captivated by his energy
“What really drew me in about Nick was how particular he is and how passionate he is about everything,” said Ginsberg
“That’s why we love Nick and it hurts so much to see him like this
He went from asking when he’d be getting out every single day to kind of just taking it as it comes.”
But perhaps the heaviest burden Woltersdorf has had to carry since last summer – heavier than the 11 surgeries and the fact that he won’t be graduating with his tight-knit cohort this semester – has been his injury’s impact on his finances
Woltersdorf hasn’t lived in his apartment since coming into the hospital
but he still pays rent himself since he signed onto a 12-month lease
he’s going to have to find a job to support himself right out of the hospital and potentially re-injure himself,” Ginsberg said
he can’t even apply for a California ID [to get disability benefits in California] because he’s bedridden.”
According to the California DMV’s website
applicants for a California ID must visit the DMV office in person to have their picture taken and their proof of residence verified
started a GoFundMe in January to help Nick get out of the hospital without thousands of dollars in medical bills holding him down
It took months to convince Woltersdorf to agree to the GoFundMe in his name
the biggest fear was that nobody would care or want to donate,” Woltersdorf said of his reticence
the GoFundMe racked up over $10,000 in donations
It currently stands at $20,887 with over 950 people sharing a Facebook post Woltersdorf made asking people to donate or share the GoFundMe and his story
“After Courtney [one of Nick’s friends] put that post in the Facebook group
there’s just been this outpouring of love and support and donations for Nick
The post got shared among SCA alumni and I know Rory [creator of the Facebook group] is in touch with Nick about cutting that red tape and getting him considered for disability,” Ginsberg said
the support he’s gotten from the Trojan Family means everything
“If there’s anything this experience has taught me
it’s what pure gratitude feels like,” said Woltersdorf
it just feels really good to know people can see the world through my eyes and lend me a hand.”
Woltersdorf credits his professors and advisors at SCA as one of his biggest sources of support over the past eight months
“I’ve been reading all kinds of things about SCA in the news lately
but all I know is that the people in my program– they’ve really supported me
visited me in the hospital and been by my side,” Woltersdorf said
“They’re working to get me out of this place and right back into school.”
an adjunct professor of production in SCA’s Film and Television Department
says what drew her to Nick when he was in her Intro to Production class was his creative vision and single-mindedness
“When Nick was developing his junior [year] thesis in my class
He decided he was going to make a very ambitious film
“It’s just so hard because he was really cruising at altitude and excited for what was to come
We just have to get him back so he can keep going.”
Woltersdorf currently has no idea when he’s going to be able to leave the hospital
He was scheduled for surgeries in January to fuse his spine and remove his metal neck brace
Those surgeries have been moved back while surgeons wait for his neck to heal fully
“The first thing I’ll do when I leave the hospital
I crave different things every day,” he said
“About 4 months ago I had the strangest craving for a Costco berry smoothie– some other days
Donate to Nick’s GoFundMe here.
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Active control of propagating spin waves on the nanoscale is essential for beyond-CMOS magnonic computing
we experimentally demonstrate reconfigurable spin-wave transport in a hybrid YIG-based material structure that operates as a Fabry-Pérot nanoresonator
The magnonic resonator is formed by a local frequency downshift of the spin-wave dispersion relation in a continuous YIG film caused by dynamic dipolar coupling to a ferromagnetic metal nanostripe
Drastic downscaling of the spin-wave wavelength within the bilayer region enables programmable control of propagating spin waves on a length scale that is only a fraction of their wavelength
the device structure offers full nonreciprocity
and nearly zero transmission loss at allowed frequencies
Our results provide a practical route for the implementation of low-loss YIG-based magnonic devices with controllable transport properties
A magnonic analog to the optical Fabry–Pérot resonator
especially when operating on the nanoscale
would offer an attractive means to manipulate spin-wave transport
Scattering of propagating spin waves in a magnonic crystal opens up forbidden frequency gaps when the wavelength (λ) matches 2a/n (crystal period a
If the scattering efficiency of individual units is low
robust bandgaps only form for a large number of scattering units
Since the minimal crystal period is at least half the wavelength of propagating spin waves (n = 1)
the size of a magnonic crystal is often much larger than the spin-wave wavelength
scattering in magnonic crystals not only suppresses the transport of spin waves within the bandgaps
but also limits the transmission signal at allowed frequencies
The driven nature of this interaction locks the dynamic response of the two-magnet system to the resonance frequency of the patterned ferromagnet
limiting its operation to a narrow frequency range
we introduce a magnonic Fabry–Pérot nanoresonator allowing versatile manipulation of low-loss spin-wave transport
The resonator structure consists of a ferromagnetic metal stripe on top of a continuous nanometer-thick YIG film
Local dynamic dipolar coupling between the two magnetic layers produces two magnonic interfaces within the YIG film at the bilayer edges
propagating spin waves partially reflect/transmit and their wavelength converts
Destructive interference between incoming and circulating spin waves inside the YIG/ferromagnetic metal bilayer region suppresses the transmission signal at discrete frequencies
Drastic downconversion of the spin-wave wavelength within the narrow bilayer facilitates manipulation of micrometer-long spin waves (λ = 10 − 50 μm) by single nanostripes with widths down to 270 nm
Other attractive features of the magnonic Fabry–Pérot resonator include operation over a broad frequency range
nearly zero transmission loss at allowed frequencies
great flexibility in the design of forbidden frequency bands
and active modulation of the output signal via magnetic gating
a Schematic of the experimental geometry
Spin waves are excited in a nanometer-thick YIG film using a microwave antenna and are detected by a second antenna or imaged by TR-MOKE microscopy
A magnetic bias field (Hext) saturates the magnetization of YIG and the ferromagnetic metal parallel to the stripe
b Spin-wave transmission spectra (amplitude of S12 and S21) recorded on an uncovered 100-nm-thick YIG film (orange) and the same YIG film with a 730-nm-wide CoFeB stripe (blue)
c Contour plot of the S12 amplitude as a function of magnetic field
d Spin-wave transmission spectra (amplitude of S12) recorded on a 100-nm-thick YIG film with a 1.1-μm-wide and a 6.0-μm-wide CoFeB stripe (blue curves in top and bottom panel
Reference measurements on uncovered YIG films are shown in orange
Phase-resolved TR-MOKE microscopy maps and line profiles measured on a 100-nm-thick YIG film with a 730-nm-wide CoFeB stripe (a
b) and corresponding micromagnetic simulations (c
The inset in (c) zooms in on the YIG/CoFeB bilayer
f Phase-resolved TR-MOKE microscopy maps and line profiles recorded on a 100-nm-thick YIG film with a 30-μm-wide CoFeB stripe for spin waves propagating along +x (e) and −x (f)
The excitation frequency in e–h is 1.76 GHz and μ0Hext = +10 mT
the incoming λ1 spin wave converts to a λ3 wave (e
The dashed lines in the graphs mark the CoFeB stripe
we will demonstrate that the transmission gaps measured on structures with narrow CoFeB stripes are caused by destructive interference between the spin waves entering and the spin waves circulating the YIG/CoFeB bilayer
analogous to the operation of an optical Fabry–Pérot resonator
and calculated (lines) spin-wave dispersion relations for a 100-nm-thick YIG film (λ1) and a YIG/CoFeB bilayer (λ2 and λ3)
μ0Hext = +10 mT and the thickness of CoFeB is 50 nm
b Simulated phase accumulation during a full internal reflection cycle for the n = 2 and n = 3 transmission gaps for different stripe widths
Parameter φ0 is extracted as the difference between 5π (n = 2) and 7π (n = 3) and the average value of the simulated phase accumulations of these modes (dashed lines)
c Frequency of the spin-wave transmission gap as a function of CoFeB stripe width for n = 1–6
The blue dashed lines are calculated using the condition of minimum transmission and the asymmetric dispersion relation of the YIG/CoFeB bilayer (squares in (a))
A constant value of φ0 = 1.34π is used for all transmission gaps
Experimental results (circles) and simulations (squares) of transmission gap frequencies agree with the magnonic resonator model
d Spin-wave transmission spectra (amplitude of S12) recorded on a 100-nm-thick YIG film with a 270-nm-wide CoFeB stripe
The transmission gap in the spectrum corresponds to the n = 1 resonance condition
f Free spectral range (ΔfFSR) and finesse (\({\mathcal{F}}\)) of a 6-μm-wide magnonic Fabry–Pérot resonator as a function of magnetic bias field and frequency
we find a total transmission T = 0.92 at an allowed frequency of 1.76 GHz
because the experimental data and calculations only agree when the absorption coefficient is set close to zero
the energy loss caused by dipolar coupling to CoFeB is small in the nanoscale resonator
the magnonic Fabry–Pérot resonator offers several attractive features including drastic downscaling of the device size at GHz frequencies and nonreciprocal signal transport
Magnonic Fabry–Pérot resonators with optimized finesse values could therefore find applications in narrowband microwave filtering and spectroscopy
We will now discuss ways to widen and deepen the transmission gap and to actively manipulate spin-wave transport in the magnonic Fabry–Pérot resonator
a Spin-wave transmission spectra (amplitude of S12) measured on a 70-nm-thick YIG film with two and four 250-nm-wide CoFeB stripes (green and blue curves) and the same YIG film without stripes (orange curve)
μ0Hext = +6 mT and the center-to-center distance between the stripes (period p) is 500 nm
b Dependence of the transmission gap size on magnetic bias field for samples with four and eight 250-nm-wide CoFeB stripes
c Spin-wave transmission spectra recorded at μ0Hext = +6 mT and contour plot of the S12 amplitude as a function of magnetic bias field for a resonator structure with eight CoFeB stripes
The stripe widths increase from 200 to 270 nm in 10 nm steps
The orange curve depicts a reference measurement on the same YIG film without stripes
d Variation of the transmission gap size with magnetic bias field for the same sample as in (c)
e Comparison of spin-wave transmission spectra recorded on resonator structures with four 550-nm-wide Py stripes and four 550-nm-wide CoFeB stripes
f Spin-wave dispersion relations for YIG/Py and YIG/CoFeB bilayers at μ0Hext = +10 mT
a Calculated spin-wave dispersion relations for a 70 nm YIG/50 nm CoFeB bilayer with parallel (P) and antiparallel (AP) magnetization configurations
Switching between the two states involves magnetization reversal in the YIG film
which changes the sign and magnitude of k2 and k3
b Spin-wave transmission spectra (amplitude of S12) of a 70-nm-thick YIG film with four 250-nm-wide CoFeB stripes (p = 500 nm) for parallel (blue curve
μ0Hext = +10 mT) and antiparallel (dark yellow curve
The magnetization of the YIG film is switched
c Contour plot of the S12 amplitude as a function of magnetic field for the same device structure
The field is swept from +25 to −25 mT and switching between different magnetization states is indicated by dotted lines
d–g TR-MOKE microscopy maps and line profiles recorded at 1.92 GHz for four different magnetization configurations
Dashed lines mark the region with four 250-nm-wide CoFeB stripes
h Modulation of the spin-wave transmission signal during sequential switching between parallel and antiparallel magnetization states
Data for three different bias fields are shown
the red and green arrows depict the direction of magnetization in CoFeB and YIG
we have experimentally demonstrated a magnonic Fabry–Pérot resonator for low-loss spin-wave manipulation on the nanoscale
Our approach involving dynamic dipolar coupling between a narrow ferromagnetic metal stripe and a YIG film enables versatile tuning of spin-wave transport by variation of the stripe width or active gating via magnetic switching in the bilayer
Fabrication of the magnonic resonator is compatible with other YIG-based magnonic elements and provides a simple route for the integration of small-footprint magnonic devices without the need for ultrashort wavelength excitation and detection
We grew YIG films with a thickness of 70 and 100 nm on GGG(111) substrates using PLD
The GGG substrates were ultrasonically cleaned in acetone and isopropanol before loading into the deposition chamber
We degassed the substrates at 550 °C for 15 min
oxygen was inserted into the chamber and the temperature was raised to 800 °C at a rate of 5 °C per minute
YIG films were deposited from a stoichiometric target in an oxygen partial pressure of 0.13 mbar at this temperature
We used an excimer laser with a pulse repetition rate of 2 Hz and a laser fluence of 1.8 J/cm2
we first annealed the YIG films at 730 °C for 10 min in an oxygen environment of 13 mbar and then cooled them down to room temperature at a rate of −3 °C/min
The deposition process resulted in single-crystal YIG films
as confirmed by x-ray diffraction and transmission electron microscopy measurements
Py) with a thickness of 50 nm were patterned onto the YIG films by photolithography or electron-beam lithography
The ferromagnetic metals were grown by magnetron sputtering at room temperature onto a 5-nm-thick TaOx spacer
we performed lift-off by placing the samples in a bath of acetone
two parallel microwave antennas with a separation of 200 μm were patterned on top of the YIG films using a laserwriter LW405 system and magnetron sputtering
The antennas consisted of 3 nm Ta and 120 nm Au
allowing the excitation of spin waves with wave vectors up to π/wa
The setup for spin-wave characterization consisted of a two-port vector network analyzer (Agilent N5222A) and a home-built electromagnet probing station
FMR spectra were recorded by placing the sample face-down onto a coplanar waveguide with a 150-μm-wide signal line
We measured spin-wave transmission spectra by measuring S12 and S21 scattering parameters
the power of the microwave excitation signal was set to −10 dBm
We used a frequency sweep method to record transmission spectra at different magnetic bias fields
The strength of the magnetic field was changed in a stepwise fashion from positive to negative
we subtracted a reference spectrum taken at 100 mT from the real and imaginary values of the S12 and S21 scattering parameters
The recorded real and imaginary data sets were subsequently used to calculate the amplitudes of S12 and S21
More details on the approach can be found in ref. 30
In order to find the spin-wave dispersion relation of the bilayer system
we assume that the magnetostatic potential ψ inside and outside the ferromagnetic layers is of the form \({\psi }_{{\rm{in,ext}}}(x,z)={\zeta }_{{\rm{in,ext}}}(z){e}^{(i{k}_{x}x)}\) and
z denotes the coordinate along the out-of-plane direction and x is the propagation direction
kz are the corresponding wave vectors along those directions
d2 are the thicknesses of layer 1 and layer 2
We then solve the following conditions at the four boundaries:
and F are eliminated from the system of equations
the determinant of the system of equations must vanish
κm and νm are specified as \({\kappa }_{m}={\Omega }_{Hm}/({\Omega }_{Hm}^{2}-{\Omega }_{m}^{2})\) and \({\nu }_{m}={\Omega }_{m}/({\Omega }_{Hm}^{2}-{\Omega }_{m}^{2})\)
Msm is the saturation magnetization of layer m = 1
we make the substitution \(H\to {H}_{{\rm{ext}}}+2{A}_{m}/({\mu }_{0}{M}_{{\rm{s}}m}){k}_{z}^{2}\) to include exchange interactions inside layer 1 and layer 2
Am is the exchange constant of layer m = 1
2 and Hext is the external magnetic bias field
This substitution corresponds to the use of an effective field in each layer
Static contributions to this term such as magnetic anisotropy could be implemented in a similar fashion
but turned out to be unnecessary for the materials studied here
Substitution of \({t}_{13}{t}_{31}=A{e}^{i{\varphi }_{A}}\) and \({r}_{32}{r}_{23}=B{e}^{i{\varphi }_{B}}\)
where φA and φB correspond to added phase shifts at the interfaces
Minimum transmission occurs when the denominator of Eq. (6) reaches a maximum value
For fixed reflection and transmission coefficients
this condition is satisfied when the phase of \({e}^{-i(| {k}_{3}| w+{\varphi }_{A})}\) and \(B{e}^{i(| {k}_{2}| w+{\varphi }_{B}-{\varphi }_{A})}\) differ by an odd number of π
The condition of minimum transmission is therefore given by
Both dipolar effects are taken into account in the model by adding a phase shift φdip to each internal reflection cycle
the resonance condition producing minimum transmission is then given by
We find that the frequencies of experimentally measured and simulated transmission gaps (n = 1–18) are well described by this resonance condition assuming a constant value of φ0 = 1.34π (Fig. 3c and Supplementary Fig. 9)
The agreement demonstrates that the inclusion of dipolar effects via an effective phase shift is a good first-order approximation
We performed micromagnetic simulations using open-source GPU-accelerated MuMax3 software25
The YIG film thickness was 100 nm and its in-plane dimensions were set to 655 μm along x and 0.64 μm along y
Two 50-nm-thick CoFeB stripes centered at x = ± 100 μm were placed on top of the YIG film to simultaneously simulate spin-wave transmission for negative and positive wave vectors
The CoFeB stripes were separated from the YIG film by a 5-nm-thick nonmagnetic layer (accounting for the TaOx spacer in experiments)
One-dimensional periodic boundary conditions were applied along the y axis
We discretized the simulation area into 10 × 10 × 5 nm3 cells
Spin waves were excited by applying a sinusoidal or sinc-function-type magnetic field across a 2-μm-wide area at x = 0
A magnetic bias field was applied along the y axis
we used saturation magnetizations Ms,YIG = 1.92 × 105 A/m and Ms,CoFeB = 1.15 × 106 A/m
exchange constants Aex,YIG = 3.1 × 10−12 J/m and Aex,CoFeB = 1.6 × 10−11 J/m
and magnetic damping parameters αYIG = 0.001 and αCoFeB = 0.005
We intentionally used a relatively large damping parameter for YIG to limit the computation time and reduce reflections from the edges of the simulation area
the time evolutions of the x-component (mx) and z-component (mz) of magnetization were recorded for 200 ns
Spatially resolved spin-wave intensity maps were obtained by Fourier-transforming the evolutions of mx or mz on a cell-by-cell basis
Further information on research design is available in the Nature Research Reporting Summary linked to this article
All data that support the findings of this study are available from the corresponding authors upon reasonable request. Source data are provided with this paper
Wolfram Mathematica 12 was used to calculate the bilayer dispersion curves
The code is available from the corresponding authors on reasonable request
Fabry-Perot Interferometers (Cambridge University Press
Practice and Applications (Taylor and Francis Group
Brillouin light scattering studies of planar metallic magnonic crystals
Review and prospects of magnonic crystals and devices with reprogrammable band structure
Growth and ferromagnetic resonance properties of nanometer-thick yttrium iron garnet films
Inverse spin Hall effect in nanometer-thick yttrium iron garnet/Pt system
Comparative measurements of inverse spin Hall effects and magnetoresistance in YIG/Pt and YIG/Ta
Nanometer-thick yttrium iron garnet films with extremely low damping
Magnetic thin-film insulator with ultra-low spin wave damping for coherent nanomagnonics
Resonant and nonresonant scattering of dipole-dominated spin waves from a region of inhomogeneous magnetic field in a ferromagnetic film
Controlled interconversion of quantized spin wave modes via local magnetic fields
Efficient wavelength conversion of exchange magnons below 100 nm by magnetic coplanar waveguides
Resonant microwave-to-spin-wave transducer
Approaching soft X-ray wavelengths in nanomagnet-based microwave technology
Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating
Giant nonreciprocal emission of spin waves in Ta/Py bilayers
Magnetic vortex cores as tunable spin-wave emitters
Optically inspired nanomagnonics with nonreciprocal spin waves in synthetic antiferromagnets
Propagating spin waves in nanometer-thick yttrium iron garnet films: dependence on wave vector
Direct observation and mapping of spin waves emitted by spin-torque nano-oscillators
Direct observation of a propagating spin wave induced by spin-transfer torque
Generating wave vector specific Damon-Eshbach spin waves in Py using a diffraction grating
Omnidirectional spin-wave nanograting coupler
Magnetostatic spin-wave modes of a heterogeneous ferromagnetic double layer
Measurement of the dynamical dipolar coupling in a pair of magnetic nanodisks using a ferromagnetic resonance force microscope
Theory of dipole-exchange spin wave spectrum for ferromagnetic films with mixed exchange boundary conditions
Spin-wave transmission through an internal boundary: Beyond the scalar approximation
Backscattering immunity of dipole-exchange magnetostatic surface spin waves
Controlling the propagation of dipole-exchange spin waves using local inhomogeneity of the anisotropy
Fabry–Pérot resonator: spectral line shapes
and performance at low or frequency-dependent reflectivity
Making a reconfigurable artificial crystal by ordering bistable magnetic nanowires
Dreyer, R., Liebing, N., Edwards, E. & Woltersdorf, G. Local spin-wave dispersion and damping in thin yttrium-iron-garnet films. preprint at https://arxiv.org/abs/1803.04943 (2018)
Download references
This work was supported by the Academy of Finland (Grant Nos
321983 and 325480) and the German Research Foundation (DFG) via CRC 227 and SPP 2137
Lithography was performed at the Micronova Nanofabrication Centre
Computational resources were provided by the Aalto Science-IT project
fabricated the samples and performed the broadband spin-wave spectroscopy measurements
conducted the SNS-MOKE microscopy measurements
performed the TR-MOKE microscopy experiments
The authors declare no competing interests
Peer review information Nature Communications thanks Haiming Yu and the other
reviewer(s) for their contribution to the peer review of this work
Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations
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Peter Woltersdorf always had ice water pumping through his veins
and always oozed cool and calmness until the very end of the season
The senior right-hander pitched a fantastic game in the semifinals to lead the Hunterdon Central High School baseball team to its second Group IV final game after bringing home the state championship in 2016
as fellow pitcher Joey DeChiaro and the Red Devils ran into a juggernaut of a Millburn team
silent assassin on the mound and in the dugout
But something happened on the field after the Red Devils loss to Millburn that lowered the veil of nonchalant composure
“I didn’t expect to cry or anything
but Joey DeChiaro came up to me and hugged me
telling me I was his role model and that he looked up to me,” Woltersdorf said
and I realize this was the last time I was going to have these guys as my teammates
but it was a nice moment at the same time.”
READ: Courier News 2017 All-Area Baseball Teams
The 2017 Courier News Baseball Player of the Year
Woltersdorf was a big time pitcher in big time games this year
After picking up the win in last year’s Group IV final
Woltersdrof pitched brilliant games in the Central Group IV and Group IV semifinals to set the Red Devils up to repeat as sectional champions
Woltersdorf posted a microscopic 1.27 ERA and an equally miniscule 0.94 WHIP
Woltersdorf set a single season school record for most wins with 11 last year and won eight more this year to set a new all-time record at 24
shattering the old record of 22 set in the 1970’s
“The ultimate goal is to win so I’m not trying to be selfish
but to have your name at the top of the record books feels really good,” Woltersdorf said
“It’s a testament to my teammates
Last year I was more of a strikeout pitcher
and this year I was more of a ground ball pitcher
It shows my teammates were a big help fielding those balls and getting them to first base for the outs.”
Woltersdorf is a pretty unassuming character if one doesn’t witness his dominance on the mound
He doesn’t have the personality of a fiery
but his confidence and his will to toe the rubber in high-pressure situations is unquestionable
READ: Rutgers Prep's Santowasso is the 2017 Courier News Coach of the Year
“I always want my team to feel like they can trust me on the mound
I want them to depend on me,” Woltersdorf said
I definitely want the ball in my hand because I want the game to be in my own control because I feel
I’m the best person for the job.”
He performs at his best when the odds are against him
“I love being in those pressure situations
even with homework,” Woltersdorf said
"Sometimes I’ll put it off to the last minute because I work well under pressure
and that carries onto the baseball field as well.”
but his teammates certainly don’t feel the heat when he’s on the mound
He’s the kind of pitcher if his team gets him two runs of run support to work with
then the opposing team is in a lot of trouble
we knew the job on the mound was done for the day,” Hunterdon Central coach Kevin Cuozzi said
“It was all about supporting him with runs
He’s the type of kid if you put him on the mound
and you’re confident he’s performing at his best.”
Apart of a rotation that featured sophomore DeChiaro and upperclassmen Alex Degen and Matt Brennan
all of which could be the ace of the staff on most other teams
Woltersdorf separated himself as the go-to guy
“He’s been the model of example
but every guy that’s been in our program the last couple years has followed suit with him,” Cuozzi said
but guys looked to him as the cornerstone of the pitching staff.”
The cornerstone will take his talents to Lehigh University next year where he hopes to crack the starting rotation during his freshman year
Staff Writer Daniel LoGiudice: dlogiudice@gannettnj.com
Martin-Luther-Universität Halle-Wittenberg
Credit: Reprinted with permission from ACS Appl
Researchers at Martin Luther University Halle-Wittenberg (MLU) and Freie Universität Berlin have developed a new
simple approach for generating terahertz radiation
Strong optical laser pulses enable terahertz electromagnetic fields to be generated directly at a specific point
The team has published its findings in the journal "ACS Applied Nano Materials"
Potential applications for terahertz radiation are wide ranging - from materials testing to communications and security technology
Terahertz radiation lies between microwaves and invisible infrared radiation in the electromagnetic spectrum
in materials science to study opaque materials
"Terahertz radiation has no ionizing effect; it does not remove electrons from atoms and therefore
That’s why it’s used in full-body scanners at airports," explains Professor Georg Woltersdorf
the radiation could only be generated using relatively complex equipment
which is why it is currently not being very widely used in research
Woltersdorf’s team worked on a new approach together with researchers from Freie Universität Berlin
"The general idea was to miniaturise the process and generate the radiation exactly where it is needed - for example
directly on an electronic chip," says Woltersdorf.
the physicists used a high-power laser which generates light pulses that last around 250 femtoseconds
One femtosecond equals one quadrillionth of a second
These extremely short optical pulses were then directed onto a magnetic nanostructure to excite the electrons inside
"This generates an intense spin current pulse," Woltersdorf explains
spin is the intrinsic angular momentum of electrons and forms the basis of magnetism
a so-called spin current flows through the interface layers of the nanostructure
The inverse spin Hall effect converts it into a terahertz current pulse
This produces the desired terahertz radiation on the chip
which can be directly coupled into wire structures and utilised
an external magnetic field can adjust the polarity of the current
This has not been possible until now," says Woltersdorf in conclusion.
The potential applications of this miniature terahertz source range from research to high-frequency electronics
materials testing and communications technology
This study was supported financially by the Deutsche Forschungsgemeinschaft (German Research Foundation
DFG) via the Collaborative Research Center CRC/TRR 227 in and the priority program SPP 1538
Study: Hoppe W. et al. On-Chip Generation of Ultrafast Current Pulses by Nanolayered Spintronic Terahertz Emitters. ACS Applied Nano Materials (2021). doi: 10.1021/acsanm.1c01449
10.1021/acsanm.1c01449
On-Chip Generation of Ultrafast Current Pulses by Nanolayered Spintronic Terahertz Emitters
The authors declare no competing financial interest
are not responsible for the accuracy of news releases posted to EurekAlert
by contributing institutions or for the use of any information through the EurekAlert system
Copyright © 2025 by the American Association for the Advancement of Science (AAAS)
Sunday’s first-round parliamentary election was a humiliation every bit as personal as his stunning rise to the presidency as a fresh-faced outsider seven years ago.’ But how has it come to this
Just two weeks before the European elections
Macron issued an urgent warning in Dresden about right-wing extremism and rallied people round to defend democracy: right-wing extremism ‘is a reality
announced parliamentary elections and thus overnight gifted right-wing extremists a credible route to power
Macron warned people that France’s united left was a hotbed of immorality and anti-Semitism
Such impulsiveness has put off even some of his own supporters
Why has he plunged his country unnecessarily into such a crisis
To understand Macron, we need to understand ‘Macronism’. What does he stand for? ‘For all the time we’ve been trying to define Macronism, now we know: it's nothing’, is how influential columnist Thomas Legran summed it up in Libération
Legran may be right as far as the consistency and coherence of Macronism are concerned
Macron has made no attempt to formulate theoretical foundations and his movement La République en marche
rapidly gave up trying to fulfil the ideological function of a political party
It emerged out of nowhere in 2017 and according to some observers
Perhaps we can get a handle on Macron’s reckless
even crazy manoeuvres by recalling that he has shattered the post-war political system in only five years
two parties had alternated in governing France
The Socialists on the centre-left and the Republicans on the centre-right
Both were rapidly dispatched by Macron’s movement and today exist only on the margins
Macron’s tour de force was to combine centre-left and centre-right in a single party
hitherto unprecedented in a Western democracy
the following graffiti could be seen in Paris: ‘Macron 2017 — Le Pen 2022’
Some on the left probably had a premonition that Macron’s policies would exacerbate France’s social divide and thus pave the way for Rassemblement National
Macronism was still considered a left-liberal experiment
Former Socialist Macron promised more democratic institutions
praised France’s cultural and religious diversity and talked a lot about preserving the French cultural values of freedom
Macronism has been synonymous with illiberalism for quite some time
His first term was characterised by market reforms aimed at turning France into a ‘start-up nation’
People were soon calling him the ‘president of the rich’
tax credits for competitiveness and employment
the abolition of the solidarity tax on wealth and the introduction of a flat tax on dividends
Macron’s raptures over unleashing ‘dynamic enterprise’ were conspicuously intermixed with scorn for the ‘lazy’ and for workers demanding secure jobs and decent pensions
‘Maximising the possible’ is how David Amiel and Ismaël Emelien, two close Macron advisors, described Macronism in 2019 in their manifesto entitled ‘Progress doesn’t fall from the sky’. A strong dose of disruption was key. Macron, who wanted to establish a broad middle ground and tear down the outdated boundaries between left and right, always intended to shake up the ‘system’.
Whatever Macron said about a ‘start-up nation’, he dived into the culture wars early on, probably to distract attention from popular resistance to his social policies. With campaigns on gender theory, banning new gender-inclusive spellings and mockery of so-called ‘wokeism’, according to Bayart, he legitimised the ‘fantasies of the new Right’ concerning identity and the nation.
Macron’s policies over the years, despite his rhetoric, have never been the ‘firewall against populism’ that many, especially in neighbouring European countries, thought they saw.
Naturally, Macron is not the sole cause of right-wing extremism’s success. But he and his ministers have danced to Le Pen’s tune, for example, by making fun of ‘Islamo-leftists’ and social security claimants, and even accusing the Rassemblement leadership of being ‘too soft on Islam’. They are thus responsible for taking over radical narratives, spreading them and bringing them into the mainstream.
By calling a new election, Macron made it clear that he was no longer worried about a Rassemblement National government. Since dissolving parliament, he has repeatedly stated that these elections will bring ‘clarity’. He would have no problem cohabiting with Rassemblement National. He and Renaissance have already taken many of their ideas on board, particularly in the areas of authority, security, and combating immigration and terrorism.
What is likely to be remembered about Macronism is its appetite for destruction.
Macron’s election campaign, in which he attacked the left at every opportunity, basically seemed to be saying ‘rather Rassemblement National than the left-wing New Popular Front’. This sentiment is reminiscent of the 1930s, when France’s ruling classes gravitated towards Hitler rather than Léon Blum.
Adrienne Woltersdorf heads the Friedrich-Ebert-Stiftung office in Paris. She was head of the FES Communications Unit and the Office for Regional Cooperation in Asia, based in Singapore, as well as the FES office in Afghanistan. She previously reported for the Tageszeitung newspaper in Berlin and Washington, as well as leading Deutsche Welle’s China programme.
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This Butcher Says YesHow a pandemic fix became permanent for a small business in Germany
Vending machines at Landfleischerei Marx in Woltersdorf
and retrieve their meat after it drops into the bin—without having to queue inside or interact with a salesperson
“People didn’t want to shop in crowded places anymore,” says Marx
whose family has run the outlet in Woltersdorf
a village of 300 an hour’s drive east of Hamburg
Now, her coronavirus rescue is a growing part of her business. Most stores in Germany must close on Sundays and public holidays
but no such restrictions cover vending machines
leading to an upsurge of sales when the shop is shuttered
Thanks at least in part to a billboard Marx put on a nearby Autobahn
customers who haven’t sufficiently prepared for their Sunday at the grill come from as far as Hamburg to pick up bratwurst or barbecue
when Marx’s husband saw a police car stopping by in the wee hours
but the officers simply wanted breakfast supplies
BRIDGEWATER – The game ball winner for Hunterdon Central's baseball team in Tuesday's 2-0 triumph over Bridgewater-Raritan was obvious: sophomore righty Peter Woltersdorf
The lefty-swinging Toke delivered opposite field RBI doubles in the first and seventh innings for both runs
He also threw one scoreless inning in relief of Woltersdorf
Senior catcher Cale Pfauth also did a good job
helping Woltersdorf keep a dangerous lineup quiet
Senior second baseman Brett McManus singled sharply to right field on the first pitch senior righty Conlan Farrell threw in the game
but Toke followed with a double to left with McManus scoring
"It definitely gave us the momentum (scoring first) and then (Woltersdorf)Dorf went out and pitched a great game
I don't think you can pitch any better,'' said Toke
who got the win in B-R's 8-5 season-opening victory over the Red Devils at Diamond Nation
He allowed Central six hits and three runs - none earned - in five innings April 1
Farrell had the kind of line in the rematch that would most times get him a game ball – six innings
"Conlan threw a great game,'' said B-R coach Max Newill
who singled sharpely to right with one out in the third
Bridgewaer-Raritan (12-4) continues to lead the Skyland Delaware Dvision with a 6-1 record
Hillsborough (7-5) is second at 4-2 with Central (10-4-1) at 5-3-1
"We have to improve our focus and approach (at bats)
we have to understand that every game we play is against a very solid team and we have to show up and put more effort into it and I'm confident we will
Bridewater-Raritan looked like it might be up to something in the third
Jack Hanley was thrown out on a good play by shortstop Mike Perone.I zzo then recorded the Panther's first – and as it would turn out the only one
Woltersdorf got Mike Celli to ground into a force to end the threat
"I knew I had to hit my spots today,'' said Woltersdorf
"I was working on my motion during the week during practice
I wanted to simplify things where my glove placement was and Matt Toke did a great job carrying us today offensively because we needed it.''
Pfauth said Woltersdorf's off speed pitches were especially good
but he throws hard enough and today he was hitting all his spots really well,'' said Pfauth
Woltersdorf said his challenge was to sustain simplicity
"Sometimes I think too much and I wanted to keep the score out of my mind
I have to think about the batter and the matter at hand,'' said Woltersdorf
Woltersdorf walked Schnpef for the second time with one out in the sixth and the Red Devils leading 1-0
But he got a 4-6-3 double play off Celli's sharp grounder to end the inning
"He has a lot of confidence and to be able to get outs like that with a double play was big for us and big for his confidence,'' said McManus.
who misseed the first game with B-R with a sprained ankle
NOTES: Hunterdon Central coach Mike Raymond
in his 15th season saw his team deliver his 299th win
The Red Devils hope to make it 300 Wednesday when they play at Edison
Brian Woltersdorf faces several felony counts including Driving While Intoxicated after the vehicle he was driving collided with a vehicle on Highway 376 near the Henning State Park around 5:45 p.m
One of five people in the other vehicle died while the other four were injured.
After an investigation by the Branson Police Department
a warrant was issued by the Taney County Prosecutor's office for Woltersdorf's arrest and he was taken into custody earlier this week.
The complete release from the City of Branson is below:
The Branson Police Department has completed its investigation related to the fatal crash that happened December 31
on Highway 376 near Henning State Park and has resulted in the Taney County Prosecutor’s office charging 34-year-old Branson resident
the Branson Police Department responded to a two-vehicle crash on State Highway 376 west of Henning State Park
Woltersdorf was the driver of a 2008 Toyota Tacoma and was driving northbound on State Highway 376
Woltersdorf’s truck crossed the center of the roadway and into the path of a southbound 2014 Chevrolet Impala
The Chevy Impala was occupied by five people
Four of them were transported by ambulance to area hospitals
The fifth passenger from the Chevrolet Impala was pronounced deceased on scene by the Taney County Coroner
The force of the collision caused Woltersdorf to be ejected from his truck
Woltersdorf was also transported by ambulance to a hospital for treatment
Brian Woltersdorf has been charged with the criminal offenses of DWI and Death of a Person (Felony B) and 4 counts of DWI with Serious Physical Injury (Felony D)
The Taney County Court issued a warrant for his arrest with a $200,000 bond on July 15
Woltersdorf was taken into custody on July 20
the victim and the victim’s family have remained in the thoughts and prayers of everyone at the Branson Police Department and it sends its sincere condolences
The Department also reminds all drivers that driving while intoxicated has severe consequences
Metrics details
the spin degree of freedom is used to transmit and store information
To this end the ability to create pure spin currents—that is
When the magnetization vector in a ferromagnet–normal metal junction is excited
the spin pumping effect leads to the injection of pure spin currents into the normal metal
The polarization of this spin current is time-dependent and contains a very small d.c
component of the spin currents can be detected efficiently using the inverse spin Hall effect
The observed a.c.-inverse spin Hall voltages are one order of magnitude larger than the conventional d.c.-inverse spin Hall voltages measured on the same device
Our results demonstrate that ferromagnet–normal metal junctions are efficient sources of pure spin currents in the gigahertz frequency range
A spin current is generated by spin pumping at the FM–NM interface (grey arrows)
The time-dependent spin polarization of this current (indicated as purple arrow) rotates almost entirely in the y–z plane
component (yellow arrow) appears along the x axis
Due to the inverse spin Hall effect both components lead to charge currents in NM and can be converted into a.c
voltages by placing probes along the x and y directions
The absorption of a spin current in a nonmagnetic metal with a finite spin Hall effect leads to an electric field E and is referred to as the inverse spin Hall effect (ISHE)
The voltage UISHE transverse to the spin current JS and spin polarization σ is:
Therefore, the d.c. and a.c.-ISHE voltage components may be measured as shown in Fig. 1
(a) Layout of the measurement configuration
The microwave signal is split into a part that excites the sample and a reference arm where amplitude and phase can be adjusted independently
The signal on terminal 2 is used for inductive FMR measurements
while the signal on terminal 3 originates from a.c.-ISHE
This signal is either measured using a power meter or a lock-in amplifier
In-plane rf excitation (hy) is used when the bilayer stripe is placed on top of the signal line of the CPW
while placing the bilayer in the gap between signal line and ground planes leads to an out-of-plane excitation field (hz)
(b) FMR resonance field as a function of microwave frequency
The upper left inset shows a typical FMR spectrum of the Pt/Ni80Fe20 bilayer measured at 8 GHz
the bottom right inset shows the frequency dependence of the resonance line width μ0ΔH
(c) a.c.-ISHE spectra at 8 GHz measured using a power meter (red) and using field modulation and lock-in amplification (blue)
a step-like feature with an amplitude of 1 mV is observed
This signal is attributed to the a.c.-ISHE
The bottom spectrum (blue line) is the a.c.-ISHE signal measured by field modulation and lock-in amplification (detection scheme 2)
This spectrum was converted into the voltage by numerical integration
Line shape and amplitude are in agreement with the spectrum observed by the power meter; however
the signal-to-noise ratio is significantly improved
power and angular dependence of the observed a.c.-ISHE signal will be examined in detail
(a) The a.c.-ISHE voltages measured by a lock-in amplifier at microwave frequencies from 3.5 to 10.5 GHz using in-plane excitation
(b) The microwave power (P) dependence of (in-plane and out-of-plane excitation) and (out-of-plane excitation) at 6 GHz
for comparison the a.c.- and d.c.- signals measured with out-of-plane excitation are multiplied by 5 and 10
The solid lines are fits to and P for a.c.- and d.c.-ISHE
(c) a.c.-ISHE measured at 6 GHz using out-of-plane excitation with different field angles φH from −90° to 90°
(d) Angular dependence of the amplitude of
Note that for in-plane excitation one finds an even symmetry of the a.c.-ISHE signal with respect to the direction of the applied field (a)
while for out-of-plane excitation one finds an odd symmetry (c)
This behaviour is expected from the symmetry of the susceptibility
while scales with as will be discussed below
(a) Comparison of the a.c.- and d.c.-ISHE voltages for the same device measured at 6 GHz in the out-of-plane excitation configuration
The a.c.-ISHE voltage is ~12 times larger than the d.c
(b,c) Comparison of the a.c.-ISHE signals for Pt/Ni80Fe20
Cu/Ni80Fe20 and Al/Ni80Fe20 measured at 8 GHz
(b) Shows data for samples with in-plane excitation while (c) shows the corresponding measurements with out-of-plane excitation
All NM and FM layers have a thickness of 10 nm
signals may also be generated by parasitic mechanisms instead of ISHE
These are (i) inductive coupling of the magnetization with the conducting wire loop used for signal detection and (ii) anisotropic magnetoresistance (AMR)
The magnitude of both of these effects will be addressed in the following
line shape and magnitude of the signal are in line with the theory of a.c.-ISHE and strongly indicate that the a.c
signals measured for Pt/Ni80Fe20 bilayers are indeed a consequence of the spin currents generated by spin pumping and detected by the ISHE
A thick alumina layer (50 nm Al2O3) deposited by atomic layer deposition is used to insulate the NM–FM bilayer stripes and the contact electrodes from the CPW
In all experiments the stripes are 5 μm wide and 400 μm long
Enhanced gilbert damping in thin ferromagnetic films
Gilbert damping in single and multilayer ultrathin films: role of interfaces in nonlocal spin dynamics
Ferromagnetic resonance linewidth for NM/80NiFe/NM films (NM=Cu
Quantifying spin hall angles from spin pumping: experiments and theory
Spin pumping and anisotropic magnetoresistance voltages in magnetic bilayers: theory and experiment
Electrically tunable spin injector free from the impedance mismatch problem
Mn) As structures induced by ferromagnetic resonance
Dynamically generated pure spin current in single-layer graphene
Solution-processed organic spin-charge converter
Magnetization dynamics due to pure spin currents in magnetic double layers
Phase-resolved X-ray ferromagnetic resonance measurements of spin pumping in spin valve structures
Optical detection of spin transport in nonmagnetic metals
Hyde, P. et al. Electrical Detection of Direct and Alternating Spin Current Injected from a Ferromagnetic Insulator into a Ferromagnetic Metal. Preprint at http://arxiv.org/abs/1310.4840 (2013)
Indication of intrinsic spin hall effect in 4d and 5d transition metals
Spin-torque switching with the giant spin hall effect of tantalum
Conversion of spin current into charge current at room temperature: Inverse spin-hall effect
Spin backflow and ac voltage generation by spin pumping and the inverse spin hall effect
Direct phase probing and mapping via spintronic michelson interferometry
Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
Inverse spin hall effect in Ni81Fe19/normal-metal bilayers
Spin-torque ferromagnetic resonance induced by the spin hall effect
Liu, L., Buhrman, R. & Ralph, D. Review and analysis of measurements of the spin hall effect in platinum. Preprint at http://arxiv.org/abs/1111.3702 (2011)
Weiler, M., Nembach, H. T., Shaw, J. M. & Silva, T. J. Comment on detection of microwave spin pumping using the inverse spin hall effect. Preprint at http://arxiv.org/abs/1401.6407 (2014)
Direct electronic measurement of the spin hall effect
Extrinsic spin hall effect induced by iridium impurities in copper
Microwave photovoltage and photoresistance effects in ferromagnetic microstrips
Detection of microwave spin pumping using the inverse spin hall effect
Weiler, M., Shaw, J. M., Nembach, H. T. & Silva, T. J. Phase-sensitive detection of spin pumping via the ac inverse spin Hall effect. Preprint at http://arxiv.org/abs/1401.6469 (2014)
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Dahai Wei and Martin Obstbaum: These authors contributed equally to this work
Institut für Experimentelle und Angewandte Physik
discussed the results and commented on the manuscript
The authors declare no competing financial interests
Supplementary Notes 1-3 and Supplementary References (PDF 2190 kb)
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It was not an easy conclusion to the 2023 season for the riders of the toughest Enduro series in Germany
The Motorcycle Club Woltersdorf tried something new after staging EnduroGP World Championship
and German Championship races in recent years by hosting HESG
Just before the start of the Prologue Awards
the rain finally stopped after soaking the entire track overnight
Fynn Hannemann was the first to complete the lap but struggled with the wet conditions and placed seventh which was enough for the overall prologue victory for the season
Marc Wulf was the second rider took the lead directly and did not let go and this result laid the groundwork for his championship title
Wulf sat 18 points down but five points for the Prologue put him clear of his fiercest pursuer Felix Bähker
Milan Schmüser also returned with a bang after a long injury with second place
spectators flocked in droves to the season finale as well
They experienced exciting action with constantly changing places in the group races with Kevin Gallas and Milan Schmüser eventually claiming the two motos
A title decision was made during the group races as Eva Täuber secured enough points to call herself HESG Women’s Champion for the first time
she is only the second female rider to clinch this still young title as the champion
there was great tension with MC Woltersdorf making a small mistake that necessitated a restart
After this was swiftly resolved and the field restarted
but the race distance had to be shortened to just 40 minutes due to the encroaching darkness
In the first lap Kevin Gallas initially crossed the finish line first but he later dropped out during lap two allowing Leon Hentschel to claim the lead
Hentschel made a clear statement that next year he’s coming back for the HESG title
Leon came home first to the finish line after three laps making him the sixth winner this season
The second big surprise of the day was Fynn Hannemann
He already made a statement in the group races in Schwepnitz
This race things went perfectly for the Beta pilot with the second-best lap time and an excellent second place along with the Junior class win
Milan Schmüser also returned in impressive form and secured third place
took fourth and fifth places in the final race of the season and with P5
Wulf had done enough to crown himself the new champion
Wulf is the third overall winner of the series after Kevin Gallas and Leon Hentschel
In the Amateurs category Lukas Debus took with another victory ahead of Max Rutz in the final
Debus will thus start in the professional category next year
The 2023 HESG concludes with a seventh season already in planning for the spring of 2024
All final standings of the season can be found here: www.hardendurogermany.de/championship-2023
More information: www.hardenduro-germany.de
Photo Credit: Michel238pic | Michel Kuchel + DG Design | Denis Günther
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the "Transformative Science" research prize has been offered by the Wuppertal Institute and the Zempelin Foundation in the Donors' Association for the Promotion of Humanities and Sciences in Germany (Stifterverband)
The winner of the "Transformative Science" research prize has now been selected: Dr
Laura Woltersdorf (Goethe University Frankfurt) impressed the jury with her integrated evaluation concept for sustainable water resource management
Her research was undertaken as part of the CuveWaters project
sponsored by the German Ministry of Education and Research (BMBF)
which is an excellent example of the design
implementation and consolidation of a transdisciplinary research project in the area of development and aid work
The "Transformative Science" research prize focuses on all forms of research that spark and promote social impetus and thus involve civil society
Transdisciplinary research design plays a significant role in this
The research prize is endowed with 25,000 euros
The money is awarded to prize winners for their project ideas in the field of transformative science
the Wuppertal Institute has awarded the research prize
which is funded by the Zempelin Foundation in the Donors' Association for the Promotion of Humanities and Sciences in Germany (Stifterverband)
The Wuppertal Institute sees it as recognition of its achievements in this field that the Donors’ Association commissioned the Institute to coordinate the award of the Zempelin Foundation-sponsored prize for "Transformative Science"
"We are delighted that the jury chose to present the first award of the prize to Laura Woltersdorf
a scientist who was working for a long time at one of the leading institutes for transdisciplinary research and who demonstrates the potential of transformative research with a social impact in an exemplary way in her work," said Prof
Laura Woltersdorf’s research: a sustainable water use concept
carried out at the Institute for Social-Ecological Research (ISOE)
Laura Woltersdorf developed an integrated evaluation concept for sustainable water management in Namibia
"The use of non-conventional water resources
reused municipal (waste) water and harvested rainwater
helps to utilise the water resources that are available locally in a more efficient and productive way," says Dr
the scientist demonstrates which technology options are ecological in areas with limited water resources
or are socially and economically beneficial for fighting poverty as well as most effective under the existing local institutional conditions and technical possibilities
she worked closely with local stakeholders and integrated their empirical knowledge: the concept therefore made a significant contribution to decisions affecting water management in the region and enjoyed high public acceptance
Laura Woltersdorf currently works at Goethe University Frankfurt as a post-doctoral researcher in the Hydrology Research Group at the Institute of Physical Geography
her work focuses on methods of transdisciplinary research and links between social and natural sciences
The jury attached great importance to the social relevance of the subject and to the quality and innovative character of the research design
The prize winners are expected to be role models for other researchers
The jury agreed that Laura Woltersdorf’s work was an outstanding example of a transdisciplinary research project in the context of development cooperation
The winner will use the prize money to support her transdisciplinary research: "In particular
I will use the prize money to further develop my integrative methods
I would also like to give the international research community an understanding of my results and thus extend my network"
The interplay between science and society is currently undergoing a dynamic development
"Grand Societal Challenges as a Topic for Science Policy"
the German Council of Science and Humanities (Wissenschaftsrat) emphasised the importance of closer links between science and society
the Wuppertal Institute has been committed to this kind of society-orientated science
Press release from the Wuppertal Institute for Climate
Head of Communications and Public Relations
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The finale to the 2024 European Enduro season was a cold but bright one in virtually the suburbs of Berlin in the East of Germany.
At the end of a long season a quality entry list from across Europe headed to Woltersdorf to wrap-up the championships on three laps of technical and tight tests begun at 08:00 and across two days
The story of the weekend was British KTM rider Dan Mundell sealing the victory in both E2 class and the overall championship
The TNT Squadre Corse KTM team rider has regrouped in recent seasons and
despite a wrist injury late which has kept him off the bike for six weeks prior to this weekend
adds the 2024 European title to the British Enduro Championship crown already claimed last month
Mundell finished both days in second place on the scratch podium behind Sherco Racing’s EnduroGP rider
The German followed suit with some of the EnduroGP elite in popping into the European series on home soil taking the win comfortably overall
Crucially for Mundell in the points standings
his 2-2 scorecard for the weekend scratch put him ahead of main championship rivals David Soreca and Matej Skuta on both days and the title was nailed on
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the German round proved difficult for points leader Riccardo Pasquato
the Italian took two sixth places but it was enough for the 2024 European Youth Champion ahead of French rider Gabin Allemand
In Junior 1 Pry Juupaluoma took the day wins but French rider Killian Lunier
despite a broken brake disc forcing retirement on the final day in Waltersdorf
takes the title following a convincing season including five wins
the competition was tight until the last test between Diego Haution and Matej Skuta
Skuta claimed victory on the day but Haution took the European Junior 2 title by just one point
David Soreca is E1 champion for the season on the Kawasaki while Anthony Geslin has been the most successful rider all season with 100% record in E3 class for that championship title
In a European season with many French victors
Mauricette Brisebard adds her name to eh record books with the Women’s class title for 2024 while Maurizio Micheluz claims yet another European championship in the seniors
Motoclub Gaerne was crowned European Champion
France took first place in the Youth/Junior category
Slovakia the Women’s category and Finland dominated the Senior
More information and full results: www.europeanenduro.com
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In Mike Raymond’s final season as the Hunterdon Central High School baseball team’s head coach
the coach-turned-athletic director led the Red Devils to the Group IV state championship with a very experienced and talented roster at his disposal in 2016
With longtime assistant Kevin Cuozzi now at the helm
and a return to the state title game is very much in play
Some might say the Red Devils should expect to be playing in Toms River once again in June
the Red Devils will play as if they have something to prove
even if no external forces truly doubt them
so it’s guys who have been there before and done it
but the biggest point of emphasis is they have to prove it all over again,” Cuozzi said
This year is going to be more about our mental focus and mindset
so you have to be mentally prepared every time.“
READ: Skyland Conference Delaware Division 2017 team-by-team preview
READ: Skyland Conference Mountain Division 2017 team-by-team preview
This season marks the first time the Red Devils will have someone other than Raymond managing the team in 17 years
Cuozzi has been an assistant under Raymond
who won 335 games and three state titles at Hunterdon Central
Cuozzi previously worked with the JV and freshman teams and has seen many of the current varsity players develop into the talented players they are now
His familiarly with the program and the kids makes the transition fairly seamless
and it makes the transition a lot easier and a lot more comfortable,” senior right-handed pitcher Peter Woltersdorf said
“We know if we have either Raymond of Cuozzi at the head
who may very well be the best pitcher in the Skyland Conference
was a vital part of last year’s state championship run
The righty set new school records for wins (11)
innings pitched (78) and complete games (seven)
He finished 2016 with a microscopic 0.80 ERA
READ: Skyland Conference Raritan Division 2017 team-by-team preview
READ: Skyland Conference Valley Division 2017 team-by-team preview
He throws both a four-seem and two-seam fastball
but his best pitch is his slider that's devastating break moves away from right-handed batters and catches them fishing
Woltersdorf is developing a changeup that will break opposite of his nasty slider in an attempt to keep hitters even more off balance
He doesn’t shy away from adversity on the mound
the ice water in his veins only cools as the temperature rises
Woltersdorf tossed 6 1/3 brilliant innings in the Group IV final against Morristown last June
I want the team’s success to be on my shoulders
I don’t mind taking the blame for it,” Woltersdorf said
“In a big game or in a tight situation with the bases loaded
but I do better bearing down and focusing more in those situations in order to get out of a jam.”
Having one unhittable ace can potentially be enough to make a deep postseason run
Southpaw Joey DeChiaro finished the 2016 season with a 4-1 record
READ: Union County Conference 2017 team-by-team preview
READ: Courier News preseason top 10 rankings
With one full season of varsity play under his belt
the sophomore is poised to join Woltersdorf among the elite of the Skyland Conference
last year he was a freshman thrown into the fire and succeeded,” Woltersdorf said
and I think this year he can only get better
and his changeup is still as filthy as it was last year.”
As if two studs on the mound weren’t enough
the Red Devils have even more depth beyond their top two starters
Seniors Dylan McNulty and Matt Brennan could be top-of-the-line starters at other schools
but they simply add more depth and insurance to the Red Devil rotation
Juniors Alex Degen and Justin Kosinski figure to toss quality innings on the mound as well
“We have three or four guys who can typically be an ace at another program,” Cuozzi said
so it’s going to be all about supporting our staff with runs this year.”
The Red Devils have more than enough firepower in the batting order to support the arms
who probably only will need a couple runs each start
but the graduation of first baseman Matt Toke leaves a huge hole
Junior Pete Cosentino hit out of the cleanup spot last season as the designated hitter
and will once again hit in the middle of the order and will take over for Toke at first base
The Devils also have one of the most talented
catchers in the state in senior Matt Padre
who hit .377 with 26 hits and 18 RBI last season
we’re definitely looking for him to hit in the three-hole
but we also have really strong supporting bats like Cosentino
who will be back in the four-hole,” Cuozzi said
“I think (Padre) is one of the most dangerous hitters in the state
and sometimes the most overlooked hitter in the state.”
Hunterdon Central certainly has all the ingredients for back-to-back state titles
Staff Writer Daniel LoGiudice can be reached at dlogiudice@gannettnj.com
Two months before Law Show hits the stage in January
executive director Emily Machura is up to her neck in production prep
from supervising rehearsals to finalizing costumes
University of Alberta Faculty of Law students manage to conjure a full-blown musical fundraising extravaganza completely from scratch-in their virtually nonexistent spare time
marks the 25th anniversary of the cherished tradition
volunteered for Law Show as a first-year student and has acted in the production every year since
she also gravitated to the organizing team
in the midst of an endlessly demanding professional program
but Machura wouldn't have it any other way
"Law Show's a really great chance to step outside of the rigours of the curriculum
and get to experience the school's community in a totally different way," says Machura
"It's a chance to bond with your community
It's really integral to the law school experience."
worked on three Law Shows and believes the intensity of the project is a useful distraction for those entering the taxing profession of law
"You need to figure out things that you enjoy
and that help you shift your mind away from other stressors," she says
"I don't think there are many better places to do that in a creative
Those kinds of connections transcend anything possible in a classroom alone
especially in such a stressful environment," says Carswell
"Some of my best friends from law school were part of the Law Show community."
Carswell also believes the Faculty of Law has a special gift for producing well-rounded leaders
"That shows in people's willingness to be involved in many different voluntary initiatives-such as Student Legal Services or Law Show
the collaboration includes selecting one local charity and working with it over a three-year period
Woltersdorf arrived at the U of A as a 40-year-old first-year law student
"I didn't want to try and behave like I was 24 years old," he recalls
"But I certainly felt I should get engaged with the student body and Law Show seemed like a good way to get in and get to know people."
Woltersdorf fondly remembers the fun and camaraderie of Law Show
but the philanthropic partnership affected him at a deeper level
"We dealt with Kids Kottage-that was the charity we supported the three years that I was there
I became aware of the challenges that families and parents and children are facing
and they're still wide open 15 years later."
Woltersdorf still regularly contributes to Kids Kottage
"Giving back is something you can never learn to do early enough," he says
"And it's something you saw in full force (during) Law Show."
Woltersdorf reflected on the experience of delivering a $20,000 cheque to Kids Kottage in a Canons of Construction article that's still online (see excerpt
"Was Law Show really worth all the hard work and stress?" His answer: "Are you kidding
lawsserv@ualberta.ca
780-492-3122
780-492-4924
labs and research stations are primarily located on the territory of the Néhiyaw (Cree)
Haudenosaunee (Iroquois) and Anishinaabe (Ojibway/Saulteaux)
lands that are now known as part of Treaties 6
The University of Alberta respects the sovereignty
knowledge systems and cultures of all First Nations
Our 2016 Player of the Year was absolutely dominant
The left-hander tossed three straight complete game shutouts in the Hunterdon/Warren/Sussex County Tournament
including one in the final against Newton to clinch the Lions’ first back-to-back county championships in school history
Wilson also tossed nine innings of one-run ball against Ridge in the North 2 Group IV quarterfinals and another complete game shutout against Westfield in the sectional semifinals
The Old Dominion-commit finished the year with a 1.10 ERA
a 0.92 WHIP and 105 strikeouts through 70.1 innings
he hit .344 and tallied one home run and 21 RBI
the senior ace led Somerville to a sectional title berth
His most impressive performance came against Chatham in the North 2 Group III first round
where he allowed one unearned run on five hits
one walk and struck out eight over six innings
Prescott finished the year with a 1.89 ERA and 62 strikeouts over 51.2 innings
Woltersdorf was the workhorse on the mound for a Hunterdon Central team that captured the Group IV championship
Pitching in the Group IV final against Morristown
allowing two runs on nine hits and no walks while striking out five
The left-hander set new school records in wins (11)
complete games (12) and innings pitched (78.1)
Woltersdorf also finished the season with a 0.80 ERA and 65 strikeouts
Leading a 27-5 Watchung Hills team that made appearances in the Somerset County Tournament final and the North 2 Group IV final
Reiss was one of the most dominant pitchers in the Skyland Conference
including a shutout against Millburn in the North 2 Group IV semifinals
He recorded a 0.91 ERA and 55 strikeouts through 76.2 innings for the Hustlin’ Warriors
Padre spent most of the year in the two hole of the lineup
setting up the big bat of teammate Matt Toke
He finished the year batting .377 with 26 hits
A battery mate with some of the state’s best pitchers
Padre played solid defense and helped manage the game from behind the plate
Toke was one of the most fearsome hitters in the Skyland Conference this season
game-tying two-run home run in the Group IV final and also hit a game-tying solo homerun with two outs in the top of the seventh of Hunterdon Central’s conference clinching game against Watchung Hills
He finished the year with a .468 batting average
Toke was also the closer for the Red Devils
Abbott was an underrated contributor to a Westfield team that started 0-3 but went on to win their next 18 games to set a new school record for longest winning streak
The infielder helped turn around the season with his .443 batting average and a team high 35 hits
His hustle and skill in the field also led to a solid .963 fielding percentage
three home runs and 23 RBI helped lead Montgomery to their third Somerset County Tournament title
Hollowell allowed one unearned run on two hits
two walks and struck out nine over 6.2 innings in the Cougars’ dramatic 2-1 victory over Watchung Hills in the SCT final
Hollowell finished the year with 39.2 innings pitched
Also spending playing time in center field
Hlinka set a single season school record with 28 RBI
The shortstop finished the season with a .342 batting average and 15 extra base hits
one run scored and one RBI in Delaware Valley’s 7-0 victory over Johnson in the semifinal round of the Central Group II tournament
Rubayo led Montgomery in batting average (.361)
He also hit .355 with runners in scoring position
Rubayo hit a walk off two-run single in the bottom eighth inning to lead the Cougars to a 3-2 victory over Manalapan in the first round of the Central Group IV tournament
Henry’s mighty bat helped lead Rutgers Prep to a 15-12 record and a 3-0 upset victory over top-seeded Morristown-Beard in the Prep B final
The right-hander went 2-for-4 with one run scored in that game
As the Highlanders’ center fielder and lead off hitter
He also drove in 20 runs and stole 21 bases
getting caught stealing only once all season
Katz hit a two-out RBI single in the top of the ninth inning against Westfield in the Union County Tournament semifinals to propel the Highlanders to the county final against Scotch Plains-Fanwood
where Katz hit a RBI single in the fifth inning to gain a 2-1 lead and to help the Highlanders capture their first county title in school history with a 3-2 victory
Hylton possesses one of the biggest bats in the Skyland Conference
20 RBI and finished the season with a .373 batting average and a .443 on-base percentage
Hylton hit a big two-run home run in the fourth inning of Watchung Hills’ 3-0 victory over Millburn in the North 2 Group IV semifinals
The right-handed pitcher tossed 52 innings to the tune of a 1.38 ERA and threw two complete game shutouts
including a four-hitter against Warren Hills on May 15
Rica also pitched eight innings in Ridge’s 3-1 North 2 Group IV first round loss to North Hunterdon
allowing one run on five hits and two walks
Rica also hit .309 and tallied eight doubles
a case can very easily be made for Poggi as the best first baseman in the Skyland Conference
Poggi finished the season with a .374 batting average
Seventeen of his 40 hits were for extra bases
RELATED: North Hunterdon's John Wilson is the 2016 Courier News Baseball Player of the Year
RELATED: Baseball: Courier News Final Top 10
RELATED: Gov. Livingston's Chris Roof is the 2016 Courier News Baseball Coach of the Year
Jordan Bautista; Bridgewater-Raritan: Tyler Holzapfel; Delaware Valley: Ian Kulik
George Stiuso; Governor Livingston: Drew Compton
Tyler McCulloch; Hillsborough: Mike Engelhardt
Kyle Wengryn; Hunterdon Central: Kevin Johnson
Kyle Nepton; Montgomery: Matt Gannon; New Providence: Peter House
Matt Roskoski; North Plainfield: Bruce Weyand
Carson McLaughlin; Piscataway: Justin McKeown
Kevin Tamsula; Rutgers Prep: Danny Schantz; Scotch Plains-Fanwood: Timmy Geissel; Somerville: Kellen Hardy
Tom Babalis; South Hunterdon: Robbie Rose; South Plainfield: Jared Marks
Ethan Osgood; Watchung Hills: Matt Mastrobattisa
coming at batters over the top with a wicked fastball and curveball
stymieing hitters with a three-quarter angle while mixing in a changeup
NCAA Division I recruits Alex Degen and Joey DeChiaro give Hunterdon Central High School as potent a one-two pitching punch as there could be in area baseball
“They’re both very effective with what they do
but also very different in how they throw,” Red Devils coach Kevin Cuozzi said
“So it allows us to kind of do a lot of things with how we plan to pitch them over the course of a week
How to match them up against other opponents depending on the scouting report that we get
Their versatility really allows us to do many different things with how we plan to pitch them.”
READ: Hunterdon Central enters baseball season with loaded pitching and hitting stars
READ: Statewide 2018 high school baseball preview
Throw in senior righthander Justin Kosinski and the deep Red Devils open as the Courier News No
which was the second-most wins in program history
and captured the Central Group IV championship
Hunterdon Central also returns hitting headliners in senior first baseman Pete Cosentino (Montclair State)
and senior outfielder Colin Mason (Binghamton University)
“I think he’s one of the most underrated players in the entire state
he doesn’t get the recognition that I think he deserves
I think he is one of the top hitters and most dangerous hitters in the entire state
… And he’s not just a power hitter
He’s got a great idea of the strike zone
He’s got a really solid approach.”
Many teams would find it difficult to replace a pitcher like Peter Woltersdorf
the Courier News 2017 Player of the Year after going 8-0 with a 1.27 ERA
But Hunterdon Central should be just fine. Cuozzi said the current pitchers saw how Woltersdorf prepared and competed
wasn’t a phenom as a freshman or sophomore
but he started to fill out and developed as he matured
“He really came onto the radar last spring,” Cuozzi said
“A lot of guys still really didn’t know too much about him till about midway through the season
And then he started turning a lot of heads just because his development happened so quick over the course of a year
Now he’s a regular name throughout the state in terms of being a dominant pitcher.”
Cuozzi noted that Degen consistently throws in the high 80s to low 90s throughout the five or six innings and gets stronger as the season progresses
He also plays basketball for the Red Devils and that athleticism translates to the mound
“He’s a large figure to see out on the mound,” Cuozzi said
it looks like he’s on top of you because he has that long reach
He’s releasing the ball a little closer to the plate than many other guys are
So there’s definitely that intimidation factor just by his presence
made a name for himself early in his career
he went 7-1 with 57 strikeouts as a sophomore
He attracted college interest and has committed to Old Dominion.
“Joey’s a bulldog,” Cuozzi said
“I mean he is a lovable kid off the mound
but when he’s on the mound you can see it in his eyes – he is just a dangerous competitor.”
Successful teams need a good third starter and Kosinski steps into a starting role after having been a spot starter and reliever in his career
“He’s just so accurate and he’s such a bulldog,” Cuozzi said
“His composure on the mound is next to none
He’s the same guy whether he’s ahead by three runs or down by three runs
He’s not a guy with a lot of words but when he’s on the mound
he’s going to get the job done.”
“They complement each other very well
The entire pitching staff – they’re like a small unit
It all adds up to Hunterdon Central continuing its storied baseball tradition
“It’s not so much that they’re committed year-round
which is a huge factor,” Cuozzi said
“They’re committed to themselves
They’re committed to their group of players
It’s really the chemistry here that’s really driven the program
We’re a large school and we always have talent
but it’s the chemistry within the actual program that allows them to kind of excel and succeed
These guys really live and die for each other
It’s probably the largest factor in the success in the recent years.”
Metrics details
Micron-sized magnetic platelets in the flux-closed vortex state are characterized by an in-plane curling magnetization and a nanometer-sized perpendicularly magnetized vortex core
Having the simplest non-trivial configuration
these objects are of general interest to micromagnetics and may offer new routes for spintronics applications
Essential progress in the understanding of nonlinear vortex dynamics was achieved when low-field core toggling by excitation of the gyrotropic eigenmode at sub-GHz frequencies was established
At frequencies more than an order of magnitude higher vortex state structures possess spin wave eigenmodes arising from the magneto-static interaction
Here we demonstrate experimentally that the unidirectional vortex core reversal process also occurs when such azimuthal modes are excited
These results are confirmed by micromagnetic simulations
which clearly show the selection rules for this novel reversal mechanism
Our analysis reveals that for spin-wave excitation the concept of a critical velocity as the switching condition has to be modified
which corresponds to the gyrotropic motion of the vortex
but also initiated wide investigations of the physics behind this reversal mechanism
we will demonstrate by micromagnetic simulations that the core motion is essential and explains the differences observed in the vortex core switching triggered by distinct spin waves
These modes are characterized by a radial mode number n (positive integer values starting with 1) denoting the number of nodes of the radial part within the disc and an azimuthal mode number m (integer values)
with |2m| being the number of nodes in the azimuthal part
The sign of m denotes the rotation sense of the azimuthal wave (counterclockwise (CCW): m positive
The symmetry in the frequency splitting of the azimuthal mode can be written as ωn,m,−p=ωn,−m,p
Switching only occurs if the senses of rotation (CW or CCW) of both the external field and the eigenmode (green arrows) are the same
the sub-GHz frequency gyromode is illustrated
The right hand side shows the azimuthal spin wave modes at much higher (GHz) frequencies
characterized by the radial mode number n and the azimuthal mode number (m=±1)
denoting the sense of rotation of the eigenmode
the symmetry is broken by the out-of-plane component of the core
a frequency splitting is observed between (m=−1) and (m=+1) modes
Magnetic scanning soft X-ray microscopy at the MAXYMUS endstation
BESSY II was used to determine the out-of-plane magnetization of the vortex core
The legend (c) shows microscopy images of X-ray transmission through the inner part (150 nm×150 nm) of the sample indicating the vortex core polarity (white: vortex up; black: vortex down) before and after a field burst
The phase diagrams show the points (excitation amplitude versus frequency) where vortex core reversal from up to down was observed in the experiments (a) and the simulations (b)
Rotating in-plane magnetic field bursts with an amplitude B0
a frequency f and a duration of 24 periods have been applied
As indicated in the legend of the top panel with the recorded X-ray images (c)
the blue triangles with a dot in the middle indicate vortex core switching only after a CW rotating field burst
whereas red triangles indicate switching only after a CCW field burst
Black dots indicate no switching for either rotation sense
The minima in the switching threshold with differing sense of rotation correspond to the resonance frequencies of the excited azimuthal spin wave modes with the same sense of rotation as sketched in the middle of the figure
The modes are identified with the help of the phases derived from a local fast Fourier transform of the simulated out-of-plane magnetization of the sample with 1.62 μm in diameter as shown in the inset to the right of the bottom panel (d)
The simulations with an extended frequency range up to 10.5 GHz reveal even more spin wave eigenmodes capable of vortex core reversal: the (n=2
m=+1) mode at about 9 GHz and the two (n=3) spin wave modes at about 9.8 and 10.6 GHz
Both the experiments and the micromagnetic simulations show that resonant switching of the vortex core from the down state back to the up state at the same frequency can be achieved only if the sense of rotation of the external field is reversed
This allows selective and unidirectional switching at each resonance frequency
The out-of-plane magnetization of the central part extracted from the 1.6-μm disc before the core reversal
(a) A section of 300 nm in diameter showing the excited azimuthal spin wave modes as well as the 'dip'
The dynamics of modes with the same rotation sense are similar in the number of 'dips' and in their phase relation to the vortex core
This is indicated by the arrows below the snapshots
The difference between oppositely rotating modes are the result of the symmetry breaking due to the gyrofield
(b) For comparison the central part of the same structure with 500 nm in diameter is given
This results in a much larger trajectory of the core and the 'dip'
The black bars correspond to a lateral size of 100 nm in both cases (a
(a) Vortex core velocity just before switching
The gyrofield of the moving vortex is proportional to this velocity
Because of the important contribution of the spin wave background
this quantity is not a constant at GHz excitation and shows strong differences between CW and CCW excitation
(b) Excitation time until switching occurs in a logarithmic colour scale
switching takes on the order of one period of the excitation frequency
resulting in a widening of the resonances and a dominance of the mode (n=1
The large fluctuations in the velocities can be understood when the random contribution of short wavelength spin waves are also taken into account
the velocity itself is not a switching criterion for the spin wave mode induced vortex core reversal
the feature of unidirectionality gets lost in the intersection of two oppositely rotating modes if too short bursts are applied
Because both the vortex and the created vortex–antivortex pair remain close to the centre of the structure during the excitation
the relaxation after the spin wave-induced reversal process is much faster than in the gyrotropic case
in which it has to spiral back from its orbit far away to the centre
In combination with the very small gyration radius
this fast relaxation is accelerating the whole reversal process by up to two orders of magnitude
while the total energy pumped into the system is roughly the same compared with reversal at the gyrotropic mode
This fact makes this new reversal process very beneficial for fast technological applications
our experiments show vortex core reversal at GHz frequencies
By taking advantage of the vortex polarity-dependent frequency splitting of the azimuthal modes (n
we present a concept for unidirectional reversal by exciting any of these modes up to 11 GHz
Although the dynamics depend significantly on the different combinations of core polarity and azimuthal mode number
they can be explained by the superposition of the gyrofield with the spin-wave amplitude
different vortex core velocities are observed
which excludes the velocity as a critical condition for core reversal at GHz excitation
This finding highlights the importance of spin wave–vortex interaction and boosts vortex core reversal to much higher frequencies
which may offer new routes for spintronics applications
The instrument has a resolution of about 25 nm
which is sufficient to resolve the vortex core and its polarization
The symmetry of the results were verified by also simulating with the opposite initial state
The sample was excited by homogeneous in-plane rotating magnetic field bursts with duration of 24 periods
The frequency of the bursts was scanned from 3 to 11 GHz in 0.4 GHz steps for both
Magnetic vortex core reversal by excitation of spin waves
Magnetic vortex core observation in circular dots of permalloy
Direct observation of internal spin structure of magnetic vortex cores
Equation of motion of a spin vortex in a two-dimensional planar magnet
Dynamics of vortex core switching in ferromagnetic nanodisks
Ultrafast nanomagnetic toggle switching of vortex cores
Vortex core switching by coherent excitation with single in-plane magnetic field pulses
Magnetic vortex core reversal by excitation with short bursts of an alternating field
Polarization selective magnetic vortex dynamics and core reversal in rotating magnetic fields
Two circular-rotational eigenmodes and their giant resonance asymmetry in vortex gyrotropic motions in soft magnetic nanodots
Bistability of vortex core dynamics in a single perpendicularly magnetized nanodisk
Electrical switching of the vortex core in a magnetic disk
Switching magnetic vortex core by a single nanosecond current pulse
Reliable low-power control of ultrafast vortex-core switching with the selectivity in an array of vortex states by in-plane circular-rotational magnetic fields and spin-polarized currents
Current controlled random-access memory based on magnetic vortex handedness
A frequency-controlled magnetic vortex memory
Dynamic origin of vortex core switching in soft magnetic nanodots
X-ray imaging of the dynamic magnetic vortex core deformation
Collective-variable approach to the dynamics of nonlinear magnetic excitations with application to vortices
Controlled vortex core switching in a magnetic nanodisk by a rotating field
Nucleation of a vortex-antivortex pair in the presence of an immobile magnetic vortex
Imaging of spin dynamics in closure domain and vortex structures
Excitations with negative dispersion in a spin vortex
Fourier transform imaging of spin vortex eigenmodes
Modal spectrum of permalloy disks excited by in-plane magnetic fields
Excitations in vortex-state permalloy dots
Interactions of spin waves with a magnetic vortex
Broadband spin dynamics of the magnetic vortex state: Effect of the pulsed field direction
Mode degeneracy due to vortex core removal in magnetic disks
Dynamic origin of azimuthal modes splitting in vortex-state magnetic dots
Topological gauge field in nanomagnets: Spin-wave excitations over a slowly moving magnetization background
Interagency Report NISTIR 6376.National Institute of Standards and Technology
and mechanism of vortex-core reversals in soft magnetic nanodisks under perpendicular bias fields
Absorption of circularly polarized x-rays in iron
Download references
Bogolyubov Institute for Theoretical Physics
We also thank all people involved in the construction and operation of the MAXYMUS scanning X-ray microscope at HZB
in the stripline design for microwave application is gratefully acknowledged
Arne Vansteenkiste & Bartel Van Waeyenberge
carried out the experiments; micromagnetic simulations was done by M.K.; M.K.
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
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Journal of Superconductivity and Novel Magnetism (2021)
When I put this to 28-year-old Nga (not her real name) from Northern Vietnam’s Ha Giang mountains
“Everyone knows we work under the worst conditions out there”
She’s currently works a daily 15-hour shift on the production line for a new Bluetooth headset
Like nearly all the women working for this Korean supplier in South Vietnam she endures swollen
painful legs and kidney pains on a daily basis
She usually manages to squeeze in a single toilet break at lunchtime
but the tight cycle of the assembly means she can’t go during working hours
The toilets are the other side of the factory
That’s why she gave up drinking at work a long time ago
That’s why they’ve all got bladder infections here
Like nearly all the women working for this Korean supplier in South Vietnam
Nga endures swollen legs and kidney pains on a daily basis.
EU trade officials seem content with declarations of intent
Whilst the European Commission frequently calls for better standards and environmental protection in its trade relations
it rarely takes concrete action that will make this happen
such as imposing sanctions for violations of workers’ rights.
Adrienne Woltersdorf heads the Friedrich-Ebert-Stiftung office in Paris
She was head of the FES Communications Unit and the Office for Regional Cooperation in Asia
She previously reported for the Tageszeitung newspaper in Berlin and Washington
as well as leading Deutsche Welle’s China programme
By Metro Report International2022-02-21T11:58:00
GERMANY: Schöneicher–Rüdersdorf Strassenbahn has awarded Modertrans a contract to supply three low-floor trams for use on Route 87
which connects Berlin-Rahnsdorf S-Bahn station with Woltersdorf
The 5·6 km standard gauge line is currently operated using 60-year old Gotha vehicles
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EPAPublic housing in the central region of SingaporeRead this article in German or Russian
when the first public housing projects or ‘HDBs’
the government learned how to carry out cost-effective maintenance and repair work
Singapore's model is held together by a highly efficient administration
complex financial models and effective land management
When the World Bank economist worked on housing construction in Latin America, one consistent piece of advice he used to give his clients was that it is not a good idea for governments to build and provide housing themselves. ‘Instead ... we should enable housing markets to work,’ Jha wrote in a recent blog post
‘Our clients would always respond by saying
“But what about Singapore?” And we would say the Singapore case is ..
have started grumbling in view of the rapidly rising cost of living
And the PAP administration holds some satellite towns closer to its bosom than others
Singaporeans traditionally sell their flats and downgrade to a smaller apartment when they grow old so they can finance their retirement
The state pays out only as much of a pension as a citizen has paid in
Social policy experts fear that this could trigger a financial crisis in the island’s controlled property market when millions of pensioners flood that market with their flats and are unable to find buyers
Highlights from the frosty fundraiser in support of the United Way
on what felt like the first snowfall of the season
a group of adventurous students gathered in North Campus Quad to jump into a freezing cold pool
The reason? Chillin’ for Charity
a student group out of the Faculty of Business
Chillin’ raises money by asking people to sponsor contestants to jump into a freezing cold pool
The student group is centered around the annual JDC West business competition
A large component of their participation is attached to their community involvement
which takes place through completing volunteer hours
raising funds and hosting the annual Chillin' for Charity event on campus
This year marks the first time the event was hosted in person since 2020
DJ and some toasty hot tubs — a welcome warm up for the brave contestants
Last year the U of A United Way campaign raised $495,372 to help those supported by the United Way Capital Region. Our support continues this year with a variety of events
is vampire photographer Otto Von Chriek and William Darlington is accidental editor William de Worde in Terry Pratchetts The Truth
Picture: Zyg Woltersdorf A STORY about corruption and freedom of the media comes alive in a production of Terry Pratchett's The Truth
Adapted by Stephen Briggs from the popular Discworld novel and directed by Bradley Towton
the show is being staged by Roleystone Theatre at the Don Russell Performing Arts Centre
Sergeant Detritus (Terrence Ngai) is making a cameo appearance in Terry Pratchetts The Truth
Picture: Zyg WoltersdorfThe late Terry Pratchett was a master of the fantasy genre and sold more than 85 million books worldwide in 37 languages
William de Worde becomes accidental editor of the Discworld's first newspaper with the help of two dwarves and must cope with the perils of a journalist's life
William just wants to get at the truth but everyone else wants to get him - and it's only the third edition
has been designing a fully functional press room for the show
"Trying to re-create a press set on fire in one scene
then viewed burned down in the next was an even greater one!" he laughed
"I feel our technical expert Ron Birch has met this challenge by designing something our audience will be happy with
"We were also thinking of ways to bring our troll costume back from the dead from a previous Pratchett show
and have found a few cameos that will bring some laughs."
Terry Pratchetts The Truth features Aaron ONeil as the villain Mr Pin
Picture: Zyg WoltersdorfBradley said people didn't have to be familiar with Pratchett's work to follow the story - but
"The Truth doesn't require as much back-reading as some of the other plays
so I don't think people will leave confused," he said
they can expect us to have kept as close to it as possible with a few tongue-in-cheek references
"We know our dedicated Pratchett fans like things a certain way and
left) and Boddony (Kelly van Geest) work the presses in Terry Pratchetts The Truth
Picture: Zyg WoltersdorfInvolved in theatre for the past 10 years
Bradley studied performing arts at Curtin University and appeared in several Stage Door School shows before joining Roleystone Theatre to perform in Much Ado About Nothing
Peter Pan and Charlie and the Chocolate Factory
He has also appeared in Garrick Theatre productions of A Lady Mislaid
The Producers at the Regal Theatre and has scored acting awards for his roles in She Was Only a Miller's Daughter and Footrot Flats at Roleystone Theatre
I decided to do a show from every sector of the novels," Bradley said
"The Pratchett books are loosely divided up into character groups
and The Truth includes several different ones together."
Isla Hall, left, and Callum Presbury are appearing in Terry Pratchetts The Truth. Picture: Zyg WoltersdorfTerry Pratchett's The Truth plays at 7.30pm July 1, 7 and 8 with 2pm matinees July 1 and 8. Tickets are $28.30, $24.30 concession and $17.30 children (16 and under) - book at tinyurl.com/truthpratchett
The Don Russell Performing Arts Centre is at 13 Murdoch Road, Thornlie, WA. Phone 08-9498-9414 or click here for more information
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I get my first breathtaking view of the Wungong Dam
I have the giddy sense of being an intrepid explorer on the hunt for treasure
And in a loose sense I am – I’m on a mission to discover a bounty of local art through the Armadale Hills Open Studios Art Trail
which officially opened to the public last Friday
But I’m quickly woken from my daydream of dauntlessly scouring the hills for its rich rewards by the offer of homemade scones with jam and cream
on a bushy Bedfordale block is Pollard Designs – the working studio of mother-daughter team Trudi and Helena Pollard
Trudi explains that it wasn’t always so bushy here – when she and her husband arrived about 45 years ago
many of which directly influence Trudi’s creative output
Trudi is a pioneer of Western Australian colour; she’s made it her life’s work to study native plants and extract their hues
Through a practice that is as much organic chemistry as art
Trudi has amassed an unparalleled knowledge of distilling endemic natural dyes and inks
And she’s spent the last 40 years passing that knowledge on as a lecturer and through regular workshops
has followed in her mother’s footsteps and extended that learning about natural dyes into wearable and sustainable art
using upcycled garments and ethical handwoven fabrics from Cambodia
Trudi explains that her fascination with nature and her inquiring mind are products of an unusual childhood
“I was born in 1940 in Indonesia,” she said
“Everything was natural – there were no supermarkets and indigo grew wild there
my father was taken as a prisoner-of-war to Changi
“Those who survived were taken back to Nagasaki to work in the coal mines
He was working there when the second atomic bomb was dropped
because he was underground in the mines at the time
“My mother and I were held in a concentration camp for four years
The children who were too young to work were schooled by three Montessori nuns
We had nothing – no paper or pencils
they would engage us in play with nature – we were always making things
and observing the trees and the plants around us
“I remember I was always looking on the ground for little feathers
I suppose I was always looking down to block out the horrors of what was happening all around.”
After her mother was caught smuggling some eggs back to camp one day
she was taken for public punishment and her head shaved
When Trudi lashed out at the sergeant for daring to punish her mother
citing her mother’s exceptional work in raising a “brave girl”
He then gifted her mother a piece of cloth and instructed her to make a pair of bloomers with lots of pockets for Trudi to wear
these bloomers became a tool to smuggle more food back into camp
“After a while each pocket became stained with whatever food he was piling into them – chillies and the weeds we would eat,” Trudi said
“My mother always told me that she believed that was the beginning of my fascination with natural dyes.”
travelling with her parents between various parts of the world
but I learnt an awful lot by being curious,” she said
“Einstein said ‘creativity is just intelligence having fun’.”
She arrived in Australia with her parents when she was 18
“I immediately wanted to know what the colours of Australia were,” she said
“Every other part of the world has their own colours.”
Mexico introduced a vivid red to the world through cochineal
Japan became known for its rich indigo textiles
ancient Egyptians used safflowers to create a vivid yellow
and the Phoenicians had Tyrian purple (royal purple) extracted from sea snails
“The tartan used to make kilts in Scotland was unique to each clan because of the local plants that were used to dye the material,” Trudi said
“But I struggled to find native Western Australian dyes
The very first plant she explored was eucalyptus cinerea (Argyle Apple)
“The wonderful thing about eucalypts is they contain so much oil
you don’t need any mordants – they set themselves,” she said
Trees actually give different colours depending on the season.”
Trudi shows me some beautiful peach-stained fabric which was bafflingly dyed using green eucalypt leaves
She has travelled all over Western Australia
sourcing new plants and collecting local knowledge about them
She reckons she’s now studied and experimented with up to 200 different plants
and been invited to speak at international symposiums as an expert in her field
“People overseas just love our Australian colours,” she said
Her studio is an Aladdin’s cave of homemade inks
and intricately hand-woven fabrics in a wide spectrum of hues from brilliant golds to earthy corals
But Trudi is generous with her time and her knowledge: “I love sharing what I’ve learned.”
Trudi will release her long-awaited book which shares both her life story
and the years of wisdom gleaned as an international textile artist and natural dye innovator
Anyone curious to know more about her or Helena’s practice can visit them at their studio in Bedfordale as part of the Armadale Hills Open Studios Art Trail which runs until this Sunday
Or you could pop into one of the 24 other incredible studios on the trail
To find out more visit: armadalehillsartstrail.com
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Pack a picnic and surround yourself with sonnets at Araluen Botanic Park this November
Roleystone Theatre is back with its fourth Shakespeare in the Park season
presenting the Bard’s comedy As You Like It directed by Kelmscott resident Paul Treasure
the headstrong and clever daughter of an exiled duke
She flees into the forest disguised as a boy to escape the wrath of her evil uncle
instructing Orlando on how to court and win her love – without him realising she is actually Rosalind
“Choosing the Shakespeare in the Park season is always fun
trying to weigh up what the audiences want to see with what the actors will want to do,” Paul said
“If the audiences had their way we could just do A Midsummer Night’s Dream every year – but would very quickly run out of actors willing to be in it
“Last year’s production of The Tempest was my personal pick so
“As You Like It is all about love in its various forms
“It’s also the Shakespeare play with the most songs and we have been extremely fortunate to get local composer Fred Johnston-Horstman to set the music for us.”
Paul has performed in most of Perth’s theatres – mainly with Roleystone
Kwinana and Marloo Theatres and the Mandurah Performing and Koorliny Arts Centres
He has numerous acting awards and nominations to his credit
including a 2014 Finley Award for best actor in a musical for his role as Tevye in Fiddler on the Roof with Murray Music and Drama
Paul divides his time between directing Gilbert and Sullivan Society of WA productions at the Dolphin Theatre and outdoor Shakespeare performances at Araluen
“As You Like It is Shakespeare’s only pastoral comedy and set mainly in the country,” Paul said
“I have jokingly been calling it ‘the one with sheep’ ever since we chose it
It’s not a novel approach because I have seen it done this way at least once before
“But if there is any Shakespeare play that lends itself to being set in modern-day Australia
As You Like It plays at 4pm November 4, 5, 11 and 12. Tickets are $27, $22 concession and $10 children (16 and under) – book at tinyurl.com/araluen2023 (tickets include entry to Araluen)
insect repellent and picnic blanket or low chair
BYO alcohol is permitted and light refreshments will be available from the theatre kiosk