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Title: Topological spin dynamics in cubic FeGe near room temperature

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). Finally, 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.

Authors:
 [1];  [2];  [2]; ORCiD logo [1]
  1. Cornell Univ., Ithaca, NY (United States). School of Applied and Engineering Physics
  2. Univ. of Wisconsin, Madison, WI (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1540119
Alternate Identifier(s):
OSTI ID: 1420591
Grant/Contract Number:  
SC0012245; ECCS-1609585; DMR-1120296; ECCS-1542081; DGE-1256259
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 122; Journal Issue: 18; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
Physics

Citation Formats

Turgut, Emrah, Stolt, Matthew J., Jin, Song, and Fuchs, Gregory D. Topological spin dynamics in cubic FeGe near room temperature. United States: N. p., 2017. Web. doi:10.1063/1.4997013.
Turgut, Emrah, Stolt, Matthew J., Jin, Song, & Fuchs, Gregory D. Topological spin dynamics in cubic FeGe near room temperature. United States. doi:10.1063/1.4997013.
Turgut, Emrah, Stolt, Matthew J., Jin, Song, and Fuchs, Gregory D. Tue . "Topological spin dynamics in cubic FeGe near room temperature". United States. doi:10.1063/1.4997013. https://www.osti.gov/servlets/purl/1540119.
@article{osti_1540119,
title = {Topological spin dynamics in cubic FeGe near room temperature},
author = {Turgut, Emrah and Stolt, Matthew J. and Jin, Song and Fuchs, Gregory D.},
abstractNote = {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). Finally, 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.},
doi = {10.1063/1.4997013},
journal = {Journal of Applied Physics},
number = 18,
volume = 122,
place = {United States},
year = {2017},
month = {11}
}

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