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Authors: Dohi, Takaaki
Weißenhofer, Markus
Kerber, Nico
Kammerbauer, Fabian
Ge, Yuqing
Raab, Klaus
Zázvorka, Jakub
Syskaki, Maria-Andromachi
Shahee, Aga
Ruhwedel, Moritz
Böttcher, Tobias
Pirro, Philipp
Jakob, Gerhard
Nowak, Ulrich
Kläui, Mathias
Title: Enhanced thermally-activated skyrmion diffusion with tunable effective gyrotropic force
Online publication date: 30-Nov-2023
Year of first publication: 2023
Language: english
Abstract: Magnetic skyrmions, topologically-stabilized spin textures that emerge in magnetic systems, have garnered considerable interest due to a variety of electromagnetic responses that are governed by the topology. The topology that creates a microscopic gyrotropic force also causes detrimental effects, such as the skyrmion Hall effect, which is a well-studied phenomenon highlighting the influence of topology on the deterministic dynamics and drift motion. Furthermore, the gyrotropic force is anticipated to have a substantial impact on stochastic diffusive motion; however, the predicted repercussions have yet to be demonstrated, even qualitatively. Here we demonstrate enhanced thermally-activated diffusive motion of skyrmions in a specifically designed synthetic antiferromagnet. Suppressing the effective gyrotropic force by tuning the angular momentum compensation leads to a more than 10 times enhanced diffusion coefficient compared to that of ferromagnetic skyrmions. Consequently, our findings not only demonstrate the gyro-force dependence of the diffusion coefficient but also enable ultimately energy-efficient unconventional stochastic computing.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: CC BY
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Journal: Nature Communications
Pages or article number: 5424
Publisher: Springer Nature
Publisher place: London
Issue date: 2023
ISSN: 2041-1723
Publisher DOI: 10.1038/s41467-023-40720-0
Appears in collections:DFG-491381577-G

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