SKM 2021 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 6: Skyrmions I (joint session MA/KFM)

KFM 6.5: Vortrag

Mittwoch, 29. September 2021, 11:15–11:30, H5

Skyrmion Diffusion in Confined Geometries — •Jan Rothörl¹, Chengkun Song², Nico Kerber¹, Yuqing Ge¹, Klaus Raab¹, Boris Seng³, Maarten Alexander Brems¹, Florian Dittrich¹, Robert Reeve¹, Jianbo Wang², Qingfang Liu², Peter Virnau¹, and Mathias Kläui¹ — ¹Institute of Physics Johannes Gutenberg-University Mainz — ²Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University China — ³Institut Jean Lamour Université de Lorraine France

Magnetic skyrmions are topologically stabilized quasi-two-dimensional whirls of magnetization. Diffusion of skyrmions in continuous films [1] can be exploited for novel computing approaches, which often require understanding the behavior of skyrmions in confined geometries. We were studying this behavior in different confined geometries like circles, triangles and squares using experiments and coarse-grained computer simulations. Our results indicate that mobility is not only governed by skyrmion density but also by the interplay between skyrmion numbers and geometry. For triangular or square geometries, we found that this behavior is drastically dependent on the commensurability of the skyrmion number with the shape of the confinement [2].

[1] Zázvorka et al., Nat. Nanotechnol. 14, 658 (2019) [2] Song et al., Adv. Funct. Mater. 31, 2010793 (2021)