Regensburg 2025 – scientific programme

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MA: Fachverband Magnetismus

MA 41: Poster III

MA 41.32: Poster

Thursday, March 20, 2025, 15:00–17:30, P3

Effective Geometric Model for a Magnetic Skyrmionium — •Finn Feldkamp, Alessandro Pignedoli, and Karin Everschor-Sitte — Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany

A Skyrmionium consists of a Skyrmion nested within another Skyrmion of opposite topological charge, rendering it a non-topological magnetic soliton. We use an effective geometric model to describe a Skyrmionium as a closed-loop domain wall in a thin magnetic film, extending approaches previously used for Skyrmions [1]. Our model not only provides insights into the stability of a Skyrmionium but also facilitates the analytical investigation of its excitation modes.

[1] D. R. Rodrigues, et al., PRB 97, 134414 (2018)

Keywords: Skyrmionium; Skyrmion; Domain Wall; Analytical Model; Curvature