Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 59: Magnonics III
MA 59.6: Vortrag
Freitag, 13. März 2026, 10:45–11:00, POT/0361
Direct observation of magnetic vortex resonances on curvilinear surfaces — •Sabri Koraltan1, Takeaki Gokita1, Michal Krupinski2, Sebastian Wintz3, and Amalio Fernández-Pacheco1 — 1Insitute of Applied Physics, TU Wien, Vienna, Austria — 2Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland — 3Institute for Nanospectroscopy, Helmholtz-Zentrum Berlin, Berlin, Germany
Spin waves in magnonic systems offer energy-efficient alternatives to conventional electronics [1], with low-frequency magnetic vortex resonances being particularly relevant for microwave applications [2]. While planar magnetic vortices have been extensively studied [2], their dynamics in three-dimensional curvilinear architectures remain largely unexplored. Here, we present the direct experimental observation of vortex core gyration on a 3D curvilinear surface [3]. Using a stripline antenna on a SiN membrane, we excite self-assembled polystyrene spheres coated with NiFe, which host a vortex lattice state at remanence. Time-resolved scanning transmission X-ray microscopy (TR-STXM) at BESSY II [4] captures real-space, time-resolved dynamics, revealing complex spin-wave modes due to curvature-induced field gradients. Our results highlight the potential of curvilinear magnetic architectures for next-generation magnonic devices.
[1] Chumak, Andrii V., et al. Nature physics 11.6 (2015): 453-461. [2] Yu, Haiming, et al. Physics Reports 905 (2021): 1-59. [3] Koraltan, Sabri, et al. In Preparation (2026). [4] Koraltan, Sabri, et al. Science Advances 10.39 (2024): eado8635.
Keywords: curvilinear magnonics; time-resolved stxm