Lifetime of coexisting sub-10 nm zero-field skyrmions and antiskyrmions

von Malottki, Stephan (author): University of Kiel, Germany;University of Iceland, Iceland;Dartmouth College, USA

Meyer, Sebastian (author): University of Kiel, Germany;Nanomat/Q-mat/CESAM Université de Liège, Belgium

Bessarab, Pavel F., 1985- (author): Linnéuniversitetet,Institutionen för fysik och elektroteknik (IFE),University of Iceland, Iceland

(creator_code:org_t)

Nature Publishing Group, 2023
2023
English.
In: npj Quantum Materials. - : Nature Publishing Group. - 2397-4648. ; 8:1

Related links:: https://doi.org/10.1...; show more...; https://lnu.diva-por... (primary) (Raw object); https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

Magnetic skyrmions have raised high hopes for future spintronic devices. For many applications, it would be of great advantage to have more than one metastable particle-like texture available. The coexistence of skyrmions and antiskyrmions has been proposed in inversion-symmetric magnets with exchange frustration. However, so far only model systems have been studied and the lifetime of coexisting metastable topological spin structures has not been obtained. Here, we predict that skyrmions and antiskyrmions with diameters below 10 nm can coexist at zero magnetic field in a Rh/Co bilayer on the Ir(111) surface—an experimentally feasible system. We show that the lifetimes of metastable skyrmions and antiskyrmions in the ferromagnetic ground state are above one hour for temperatures up to 75 and 48 K, respectively. The entropic contribution to the nucleation and annihilation rates differs for skyrmions and antiskyrmions. This opens the route to the thermally activated creation of coexisting skyrmions and antiskyrmions in frustrated magnets with Dzyaloshinskii–Moriya interaction.

By the author/editor: Goerzen, Moritz ...; von Malottki, St ...; Meyer, Sebastian; Bessarab, Pavel ...; Heinze, Stefan

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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