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Dresden 2020 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 59: Posters Magnetism III

MA 59.5: Poster

Freitag, 20. März 2020, 09:00–12:00, P2/EG

Lifetimes of skyrmionic states with manifold topologies in highly frustrated systems — •Moritz A. Goerzen1, Stephan v. Malottki1, Pavel F. Bessarab2,3, Sebastian Meyer1, and Stefan Heinze11Institute of Theoretical Physics and Astrophysics, University of Kiel, Germany — 2University of Iceland, Reykjavík, Iceland — 3ITMO University, St. Petersburg, Russia

A recent study [1] on a Rh/Co bilayer on Ir(111) shows an interesting energy landscape for noncollinear magnetic states due to a high degree of exchange frustration. In order to determine the suitability of the system for future spintronic technologies, we investigate the lifetimes of skyrmionic states with various topological charges. Based on an atomistic spin model parameterized from density functional theory, we perform spin dynamic simulations using the geodesic nudged elastic band method as well as transition state theory in harmonic approximation [2,3]. In determining the lifetimes of states, special care is taken for the treatment of Goldstone modes.

[1] Meyer, Perini et al., Nature Comm. 10, 3823 (2019)

[2] Bessarab et al., Sci. Rep. 8, 3433 (2018)

[3] von Malottki et al., Phys. Rev. B 99, 060409 (2019)

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