Publications related to Magnonic minibands in antidot lattices with large spin-wave propagation velocities

Chiral Spin-Wave Velocities Induced by All-Garnet Interfacial Dzyaloshinskii-Moriya Interaction in Ultrathin Yttrium Iron Garnet Films

Dirk Grundler, Ping Che, Peng Gao, Haiming Yu, Yuehui Li, Sa Tu, Jilei Chen, Jianyu Zhang, Song Liu, Tao Liu

Spin waves can probe the Dzyaloshinskii-Moriya interaction (DMI), which gives rise to topological spin textures, such as skyrmions. However, the DMI has not yet been reported in yttrium iron garnet (YIG) with arguably the lowest damping for spin waves. In ...

2020

Fast and ultrafast electron microscopies for skyrmions and plasmonics

Gabriele Berruto

In recent years, topology gained a central role in physics. We learnt that energetics could be often explained better by classes of objects defined by having qualitative differences. In today's jargon, we say they are topologically distinct. The process of ...

EPFL2019

Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal

Dirk Grundler, Sho Watanabe

Magnonic crystals are interesting for spin-wave based data processing. We investigate one-dimensional magnonic crystals (1D MCs) consisting of bistable Co20Fe60B20 nanostripes separated by 75 nm wide air gaps. By adjusting the magnetic history, we program ...

2018

Tunable Short-Wavelength Spin-Wave Emission and Confinement in Anisotropy-Modulated Multiferroic Heterostructures

Dirk Grundler

We report on the generation and confinement of short-wavelength spin waves in a continuous film with periodically modulated magnetic anisotropy. The concept, which is demonstrated for strain-coupled Co40Fe40B20/BaTiO3 heterostructures, relies on abrupt rot ...

Amer Physical Soc2017

Thermal spin torques in magnetic insulators

Yi Zhang, Jean-Philippe Ansermet, Sylvain Bréchet, Ping Che, Cheng Zhao, Haiming Yu, Sa Tu, Francesco Antonio Vetrò, Yao Zhang

The damping of spin waves transmitted through a two-port magnonic device implemented on a yttrium iron garnet thin film is shown to be proportional to the temperature gradient imposed on the device. The sign of the damping depends on the relative orientati ...

Amer Physical Soc2017

Short-Wavelength Spin Waves in Yttrium Iron Garnet Micro-Channels on Silicon

Jean-Philippe Ansermet, Ping Che, Haiming Yu, Sa Tu, Francesco Antonio Vetrò, Yao Zhang

Yttrium iron garnet (YIG) has been widely used in spin wave studies thanks to its low Gilbert damping constant. However, most high-quality YIG films are grown on gadolinium gallium garnet (GGG) substrate, which makes it difficult to integrate with existing ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Magnetic states and spin-wave modes in single ferromagnetic nanotubes

Daniel Rüffer

In this thesis the electrical properties, magnetic states and spin wave resonances of individual magnetically hollow ferromagnetic nanotubes have been studied. They were prepared from the different materials Nickel (Ni), Permalloy (Py) and Cobalt-Iron-Boro ...

EPFL2014

Exotic blow up solutions for the $\Box u^5$-focussing wave equation in $\mathbb{R}^3$

Joachim Krieger, Roland Donninger, Min Huang

For the critical focusing wave equation

\Box u = u^5

on

\mathbb{R}^{3+1}

in the radial case, we construct a family of blowup solutions which are obtained from the stationary solutions

W(r)

by means of a dynamical rescaling $\lambda(t)\frac{1}{2}W(\la ...

Michigan Mathematical Journal2014

Magnetodynamical response of large-area close-packed arrays of circular dots fabricated by nanosphere lithography

Dirk Grundler

We report a combined experimental and theoretical study of the quasistatic hysteresis and dynamic excitations in large-area arrays of NiFe nanodisks forming a hexagonal lattice with the lattice constant of 390 nm. Arrays were fabricated by patterning a 20- ...

2013

Magnonic band structures in two-dimensional bi-component magnonic crystals with in-plane magnetization

Dirk Grundler

We investigate the magnonic band structure of in-plane magnetized two-dimensional magnonic crystals composed of cobalt dots embedded into a permalloy antidot lattice. Our analysis is based on the results of numerical calculations carried out by the plane w ...

2013

Magnonic minibands in antidot lattices with large spin-wave propagation velocities

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Chiral Spin-Wave Velocities Induced by All-Garnet Interfacial Dzyaloshinskii-Moriya Interaction in Ultrathin Yttrium Iron Garnet Films

Fast and ultrafast electron microscopies for skyrmions and plasmonics

Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal

Tunable Short-Wavelength Spin-Wave Emission and Confinement in Anisotropy-Modulated Multiferroic Heterostructures

Thermal spin torques in magnetic insulators

Short-Wavelength Spin Waves in Yttrium Iron Garnet Micro-Channels on Silicon

Magnetic states and spin-wave modes in single ferromagnetic nanotubes

Exotic blow up solutions for the $\Box u^5$-focussing wave equation in $\mathbb{R}^3$

Magnetodynamical response of large-area close-packed arrays of circular dots fabricated by nanosphere lithography

Magnonic band structures in two-dimensional bi-component magnonic crystals with in-plane magnetization

Thermal spin torques in magnetic insulators

Magnetodynamical response of large-area close-packed arrays of circular dots fabricated by nanosphere lithography

Magnonic band structures in two-dimensional bi-component magnonic crystals with in-plane magnetization

Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal

Fast and ultrafast electron microscopies for skyrmions and plasmonics

Chiral Spin-Wave Velocities Induced by All-Garnet Interfacial Dzyaloshinskii-Moriya Interaction in Ultrathin Yttrium Iron Garnet Films

Tunable Short-Wavelength Spin-Wave Emission and Confinement in Anisotropy-Modulated Multiferroic Heterostructures

Short-Wavelength Spin Waves in Yttrium Iron Garnet Micro-Channels on Silicon

Magnetic states and spin-wave modes in single ferromagnetic nanotubes

Exotic blow up solutions for the $\Box u^5$-focussing wave equation in $\mathbb{R}^3$