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
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-9727
Version:	Published version
Publication type:	Zeitschriftenaufsatz
Document type specification:	Scientific article
License:	CC BY
Information on rights of use:	https://creativecommons.org/licenses/by/4.0/
Journal:	Nature Communications 14
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