Topological spin dynamics in cubic FeGe near room temperature

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 cu...

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Bibliographic Details
Published inJournal of applied physics Vol. 122; no. 18
Main Authors Turgut, Emrah, Stolt, Matthew J., Jin, Song, Fuchs, Gregory D.
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 14.11.2017
Subjects
Applied physics
Magnetic resonance
Magnets
Magnons
Microwave absorption
Phase diagrams
Phases
Room temperature
Single crystals
Spin dynamics
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ISSN0021-8979
1089-7550
DOI10.1063/1.4997013

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Summary: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, a 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.
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USDOE
SC0012245
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4997013