Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.9: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster C

Determining pinning influence on skyrmion diffusion in 2D — •Tobias Sparmann, Simon Fröhlich, Jan Rothörl, Maarten A. Brems, Fabian Kammerbauer, Peter Virnau, and Mathias Kläui — Department of Physics, Johannes-Gutenberg University Mainz

Magnetic skyrmions are considered potential candidates for the development of probabilistic computing devices since they respond strongly nonlinearly to external stimuli and feature inherent multiscale dynamics [1].

The implementation of this type of probabilistic computing relies on thermal excitation and diffusive motion of the magnetic skyrmions within thin films, which exhibit pinning due to sample inhomogeneities [2]. To better understand the impact of pinning on larger scales, we need to model and understand the effective energy landscape of all areas the skyrmion can inhabit [3].

In this work, we investigate the spatial and temporal resolution limits we hit when determining the exact effective energy landscape, and we have a closer look at the specific characteristics of skyrmion diffusive motion. With this, we develop methods to overcome those limits and end up with a complete energetic model of skyrmion pinning and diffusion [4].

[1] D. Prychynenko et al., Phys. Rev. Applied, 9, 014034 (2018).

[2] J. Zázvorka et al., Nat. Nanotechnol., 14, 658 (2019).

[3] R. Gruber et al., Nat. Commun., 13, 3144 (2022).

[4] T. Sparmann et al., in preparation (2023).

Keywords: skyrmions; diffusion; MD simulations; energy landscapes; pinning