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MA: Fachverband Magnetismus
MA 59: Posters Magnetism III
MA 59.4: Poster
Freitag, 20. März 2020, 09:00–12:00, P2/EG
Atomistic spindynamic simulations on the stability of bilayer skyrmions. — •Hendrik Schrautzer1, Stephan v. Malottki1, Pavel F. Bessarab2,3, and Stefan Heinze1 — 1Institute of Theoretical Physics and Astrophysics, University of Kiel — 2University of Iceland, Reykjavík, Iceland — 3ITMO University, St. Petersburg, Russia
Future room temperature skyrmionic applications require improved skyrmion stability. Recent experiments showed the possibility of stabilizing skyrmions in multilayered structures which was partly attributed to an increased amount of magnetic material [1]. Besides experimental approaches, a detail understanding of the role of interlayer exchange coupling on skyrmion stability is missing, while it is crucial for the development of skyrmion based racetracks in synthetic antiferromagnets [2]. Here we study the effect of different stackings and various coupling strengths of bilayers on the skyrmion stability using an atomistic spin model parametrized from first-principles, minimum energy path calculations and transition state theory. We investigate the multilayer system (Rh/Pd/2Fe/2Ir)n concerning skyrmion stability properties with ab initio-parameters [3]. For comparison we analyse exemplary stacks of the well investigated Pd/Fe/Ir system [4] for various interlayer coupling strengths and two types of stackings.
[1] Moreau-Luchaire et al., Nat. Nano. 11, 444-448 (2016)
[2] Zhang et al., Phys. Rev. B 94, 064406 (2016)
[3] Dupé et al., Nat. Comm. 7, 11779 (2016)
[4] von Malottki et al., Sci. Rep. 7, 12299 (2017)