Topological spin dynamics in cubic FeGe near room temperature
arXiv:1705.03397 · doi:10.1063/1.4997013
Abstract
Understanding spin-wave dynamics in chiral magnets is a key step for the development of high-speed, spin-wave based spintronic devices that take advantage of chiral and topological spin textures for their operation. Here we present an experimental and theoretical study of spin-wave dynamics in a cubic B20 FeGe single crystal. Using the combination of waveguide microwave absorption spectroscopy (MAS), micromagnetic simulations, and analytical theory, we identify the resonance dynamics in all magnetic phases (field polarized, conical, helical, and skyrmion phases). Because the resonance frequencies of specific chiral spin textures are unique, quantitative agreement between our theoretical predictions and experimental findings for all resonance frequencies and spin wave modes enables us to unambiguously identify chiral magnetic phases and to demonstrate that MAS is a powerful tool to efficiently extract a magnetic phase diagram. These results provide a new tool to accelerate the integration of chiral magnetic materials into spintronic devices.
arXiv comment19 pages including SI, 5 figures in the main text
References in corpus (21)
- Skyrmion Lattice in a Chiral Magnet
- The design and verification of Mumax3
- Emergent electrodynamics of skyrmions in a chiral magnet
- Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3
- Spin-Wave Modes and Their Intense Excitation Effects in Skyrmion Crystals
- Observation of magnetic excitations of skyrmion crystal in a helimagnetic insulator
- Robust formation of skyrmions and topological Hall effect in epitaxial thin films of MnSi
- Precursor phenomena at the magnetic ordering of the cubic helimagnet FeGe
- Skyrmions with varying size and helicity in composition-spread helimagnetic alloys
- Collective spin excitations of helices and magnetic skyrmions: review and perspectives of magnonics in non-centrosymmetric magnets
- A skyrmion-based spin-torque nano-oscillator
- Formation and rotation of skyrmion crystal in the chiral-lattice insulator Cu2OSeO3
- Current-Driven Dynamics of Skyrmions Stabilized in MnSi Nanowires Revealed by Topological Hall Effect
- Scattering mechanisms in textured FeGe thin films: magnetoresistance and the anomalous Hall effect
- Proposal of a micromagnetic standard problem for ferromagnetic resonance simulations
- Confinement of Chiral Magnetic Modulations in the Precursor Region of FeGe
- Gilbert damping in noncollinear ferromagnets
- Scaling Study and Thermodynamic Properties of the cubic Helimagnet FeGe
- Chiral magnetic excitations in FeGe films
- Spin-wave dynamics in FeGe helimagnet: studied by small-angle neutron scattering
- Thermodynamic investigations in the precursor region of FeGe
Cited by in corpus (6)
- Magnetic Skyrmion Bundles and Their Current-Driven Dynamics
- Crossover of skyrmion and helical modulations in noncentrosymmetric ferromagnets
- Skyrmion Topological Hall Effect near Room Temperature
- Engineering Dzyaloshinskii-Moriya interaction in B20 thin film chiral magnets
- Hopfion Dynamics in Chiral Magnets
- New Gd-based magnetic compound GdPtB with a chiral crystal structure