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Title: Field-Driven Dynamics of Magnetic Hopfions

Abstract

Herein, we present micromagnetic simulations on resonant spin wave modes of magnetic Hopfions up to 15 GHz driven by external magnetic fields. A sharp transition is found around 32 mT coinciding with a transition from Hopfions to magnetic torons. Furthermore, the modes exhibit characteristic amplitudes in frequency space accompanied by unique localization patterns in real space, and are found to be robust to damping around topological features, particularly vortex lines in Hopfions and Bloch points in torons. The marked differences in spin wave spectra between Hopfions, torons and target skyrmions can serve as fingerprints in future experimental validation studies of these novel 3d topological spin textures.

Authors:
ORCiD logo [1]; ORCiD logo [1]
+ Show Author Affiliations
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
OSTI Identifier:
1817645
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 127; Journal Issue: 25; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Magnetic domains; Magnetic texture; Magnetic vortices; Magnetism; Magnetization dynamics; Ultrafast magnetization dynamics; Chiral magnets; Noncollinear magnets Methods in magnetism

Citation Formats

Raftrey, David, and Fischer, Peter. Field-Driven Dynamics of Magnetic Hopfions. United States: N. p., 2021. Web. doi:10.1103/physrevlett.127.257201.
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Raftrey, David, & Fischer, Peter. Field-Driven Dynamics of Magnetic Hopfions. United States. https://doi.org/10.1103/physrevlett.127.257201
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Raftrey, David, and Fischer, Peter. Fri . "Field-Driven Dynamics of Magnetic Hopfions". United States. https://doi.org/10.1103/physrevlett.127.257201. https://www.osti.gov/servlets/purl/1817645.
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@article{osti_1817645,
title = {Field-Driven Dynamics of Magnetic Hopfions},
author = {Raftrey, David and Fischer, Peter},
abstractNote = {Herein, we present micromagnetic simulations on resonant spin wave modes of magnetic Hopfions up to 15 GHz driven by external magnetic fields. A sharp transition is found around 32 mT coinciding with a transition from Hopfions to magnetic torons. Furthermore, the modes exhibit characteristic amplitudes in frequency space accompanied by unique localization patterns in real space, and are found to be robust to damping around topological features, particularly vortex lines in Hopfions and Bloch points in torons. The marked differences in spin wave spectra between Hopfions, torons and target skyrmions can serve as fingerprints in future experimental validation studies of these novel 3d topological spin textures.},
doi = {10.1103/physrevlett.127.257201},
journal = {Physical Review Letters},
number = 25,
volume = 127,
place = {United States},
year = {Fri Dec 17 00:00:00 EST 2021},
month = {Fri Dec 17 00:00:00 EST 2021}
}
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https://doi.org/10.1103/physrevlett.127.257201
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