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MA: Fachverband Magnetismus

MA 21: Skyrmions II

MA 21.1: Vortrag

Dienstag, 10. März 2026, 14:00–14:15, HSZ/0004

Real-Time Modeling of Skyrmion Dynamics in Arbitrary 2D Spatially Dependent Pinning Potential Landscapes — •Simon M. Fröhlich, Tobias Sparmann, Maarten A. Brems, Jan Rothörl, Fabian Kammerbauer, Klaus Raab, Sachin Krishnia, Mathias Kläui, and Peter Virnau — Institute of Physics, Johannes Gutenberg University Mainz

We investigate how non-flat pinning landscapes influence skyrmion dynamics and develop a quantitative framework that links experimental measurements to predictive simulations. Using real-time magneto-optical Kerr microscopy, we track skyrmion hopping and dynamics in a magnetic thin-film system and extract dwell times and transition statistics across pinning sites. This data is used to construct parameters for a coarse-grained Thiele model, for which we introduce a two-stage parameter identification procedure that directly maps experimental observables onto simulation units. This calibration resolves a key barrier to quantitative quasiparticle-level modeling by enabling reconstruction of pinning energies not directly accessible on experimental timescales. We validate the resulting simulation framework by predicting the density dependence of skyrmion diffusion and confirming it through long-time measurements. The approach provides a robust, simulation-ready description of the pinning landscape and establishes a pathway for predictive in-silico exploration of skyrmion dynamics and device concepts on experimentally relevant time and length scales.

Keywords: Thiele-Model; Coarse Graining; Predictive Modeling