Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 16: Skyrmions I
MA 16.5: Talk
Tuesday, March 10, 2026, 10:30–10:45, HSZ/0004
Optical manipulation of magnetic skyrmions and antiskyrmions — •Dola Chakrabartty1, Andreas Wendeln2, 3, Manuel Zahn1,4, Sascha Schäfer2,3, and István Kézsmárki1 — 1Experimentalphysik V, Center for Electronic Correlations and Magnetism, Institute for Physics, University of Augsburg, Augsburg, D-86135, Germany — 2Regensburg Center for Ultrafast Nanoscopy, University of Regensburg, Regensburg, 93040, Germany. — 3Department of Physics, University of Regensburg, Regensburg, 93040, Germany. — 4NTNU Trondheim, Trondheim, 7034, Norway
Topological magnetic textures like skyrmions and antiskyrmions, have potential applications in next-generation spintronic devices. Notably, skyrmions and antiskyrmions can be viewed as particle- and antiparticle-like entities, respectively, with opposite topological charges and the potential to annihilate each other or be created in pairs. The controlled and fast manipulation of these spin textures are crucial for their practical applications.
In this work, we utilized in-situ femtosecond optical pulses in Lorentz microscopy and investigated the possibility of manipulating skyrmions and antiskyrmions. Our preliminary results show that ultrafast laser excitation can induce a helicity switching of elliptical skyrmions as well as the transformation between different spin textures, such as skyrmions, antiskyrmions, non-topological bubbles and stripes. A statistical analysis of our observations provides insights into the energy landscape of these magnetic patterns. Our findings suggest that laser pulses can control topological magnetic states.
Keywords: skyrmions; Antiskyrmions; Topological transition; Ultrafast Laser pulse; Spintronic devices