Enhanced thermally-activated skyrmion diffusion with tunable effective gyrotropic force

Autor
Dohi, Takaaki
Weißenhofer, Markus
Kerber, Nico
Kammerbauer, Fabian
Ge, Yuqing
Raab, Klaus
Syskaki, Maria Andromachi
Shahee, Aga
Ruhwedel, Moritz
Böttcher, Tobias
Pirro, Philipp
Jakob, Gerhard
Nowak, Ulrich
Kläui, Mathias
Datum vydání
2023Publikováno v
Nature CommunicationsRočník / Číslo vydání
14 (1)ISBN / ISSN
ISSN: 2041-1723Metadata
Zobrazit celý záznamKolekce
Tato publikace má vydavatelskou verzi s DOI 10.1038/s41467-023-40720-0
Abstrakt
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.
Klíčová slova
thermally-activated skyrmion diffusion, gyrotropic force
Trvalý odkaz
https://hdl.handle.net/20.500.14178/2361Licence
Licence pro užití plného textu výsledku: Creative Commons Uveďte původ 4.0 International