Autoren:	Zázvorka, Jakub Jakobs, Florian Heinze, Daniel Keil, Niklas Kromin, Sascha Jaiswal, Samridh Litzius, Kai Jakob, Gerhard Virnau, Peter Pinna, Daniele Everschor-Sitte, Karin Rózsa, Levente Donges, Andreas Nowak, Ulrich Kläui, Mathias
Titel:	Thermal skyrmion diffusion used in a reshuffler device
Online-Publikationsdatum:	6-Nov-2019
Erscheinungsdatum:	2019
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	Magnetic skyrmions in thin films can be efficiently displaced with high speed by using spin-transfer torques(1,2) and spin-orbit torques(3-5) at low current densities. although this favourable combination of properties has raised expectations for using skyrmions in devices(6,7), only a few publications have studied the thermal effects on the skyrmion dynamics(8-10). however, thermally induced skyrmion dynamics can be used for applications(11) such as unconventional computing approaches(12), as they have been predicted to be useful for probabilistic computing devices(13). in our work, we uncover thermal diffusive skyrmion dynamics by a combined experimental and numerical study. we probed the dynamics of magnetic skyrmions in a specially tailored low-pinning multilayer material. the observed thermally excited skyrmion motion dominates the dynamics. analysing the diffusion as a function of temperature, we found an exponential dependence, which we confirmed by means of numerical simulations. the diffusion of skyrmions was further used in a signal reshuffling device as part of a skyrmion-based probabilistic computing architecture. owing to its inherent two-dimensional texture, the observation of a diffusive motion of skyrmions in thin-film systems may also yield insights in soft-matter-like characteristics (for example, studies of fluctuation theorems, thermally induced roughening and so on), which thus makes it highly desirable to realize and study thermal effects in experimentally accessible skyrmion systems.
DDC-Sachgruppe:	530 Physik 530 Physics
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 08 Physik, Mathematik u. Informatik
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-466
URN:	urn:nbn:de:hebis:77-publ-593970
Version:	Accepted version
Publikationstyp:	Zeitschriftenaufsatz
Nutzungsrechte:	Urheberrechtsschutz
Informationen zu den Nutzungsrechten:	https://rightsstatements.org/vocab/InC/1.0/
Zeitschrift:	Nature nanotechnology 14 7
Seitenzahl oder Artikelnummer:	658 661
Verlag:	Nature Publishing Group
Verlagsort:	London
Erscheinungsdatum:	2019
ISSN:	1748-3395 1748-3387
URL der Originalveröffentlichung:	http://dx.doi.org/10.1038/s41565-019-0436-8
DOI der Originalveröffentlichung:	10.1038/s41565-019-0436-8
Enthalten in den Sammlungen:	JGU-Publikationen