Laser-induced metastable (anti-)skyrmion states with higher-order topological charge

ArXiv · 2026

Laser-induced metastable (anti-)skyrmion states with higher-order topological charge ↗

Tim Titze (University of Göttingen, Germany and), Marcel Möller (Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany and), Timo Schmidt (University of Augsburg, Germany and), Mariam Hassan (University of Augsburg, Germany and), Sabri Koraltan (Technical University of Vienna, Austria and), Stefan Mathias (University of Göttingen, Germany and, ICASEC, University of Göttingen, Germany), Manfred Albrecht (University of Augsburg, Germany and), Claus Ropers (University of Göttingen, Germany and, ICASEC, University of Göttingen, Germany), Daniel Steil (University of Göttingen, Germany and)

Ultrafast creation and manipulation of topologically non-trivial spin objects promises significant potential for spintronic applications. Here, we demonstrate laser-induced nucleation of skyrmions and antiskyrmions with topological charge up to |Q|=3 from the saturated magnetization state of a Co/Ni-multilayer which does not intrinsically host a skyrmionic ground state. The resulting configuration of spin objects thus constitutes a metastable, thermodynamically hidden magnetic state. We control the number and type of spin objects by the excitation fluence and the external out-of-plane magnetic field.

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