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MA: Fachverband Magnetismus
MA 45: Magnonics I
MA 45.8: Vortrag
Donnerstag, 19. März 2020, 11:30–11:45, HSZ 401
Non-standing spin-waves in confined micron-sized structures imaged with time-resolved STXM — •Santa Pile1, Taddäus Schaffers1, Sven Stienen2, Martin Buchner1, Sebastian Wintz3, Sina Mayr4, Johannes Förster3, Verena Ney1, Rysard Narkowicz2, Kilian Lenz2, Markus Weigand5, Jürgen Lindner2, and Andreas Ney1 — 1Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, 4040 Linz, Austria — 2Helmholtz-Zentrum Dresden-Rossendorf, Germany — 3Max Planck Institute for Intelligent Systems, Stuttgart, Germany — 4Paul Scherrer Institute, Villigen PSI, Switzerland — 5Helmholtz-Zentrum Berlin, Berlin, Germany
The STXM-FMR setup enables the visualization of the high frequency magnetization dynamics in the GHz regime with a high lateral resolution of nominally 35 nm and a time resolution of 17.4 ps [1]. In this contribution we present the results for the magnetic Ni80Fe20 micron-sized stripes with dimensions: 5x1x0.03 µm3. For FMR and STXM-FMR measurements a static magnetic field was applied in the plane of the stripes. Both FMR and STXM-FMR measurements confirm that quasi-uniform and spin-wave modes can be excited in the samples. With increasing the static magnetic field it is possible to observe the transition from one mode to another and also a superposition of the modes in-between the FMR signals, when a non-standing character of the spin-waves is visible. Financial support by the Austrian Science Fund (FWF), Project No. I-3050 is gratefully acknowledged.
[1] T. Schaffers et al., Nanomaterials 9, 940 (2019).