SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Spintronics (other effects)
MA 20.10: Vortrag
Dienstag, 28. März 2023, 17:30–17:45, HSZ 401
Driving a magnetic texture by magnon currents — •Michael Vogel1,2, Bernhard Zimmermann1, Johannes Wild1, Felix Schwarzhuber1, Claudia Mewes3, Tim Mewes3, Josef Zweck1, and Christian H. Back1,4 — 1Department of Physics, Regensburg University, Regensburg, Germany — 2Institute for Materials Science, Kiel University, Kiel, Germany — 3Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, USA — 4Department of Physics, Technical University Munic, Munich, Germany
Thermally-induced spin dynamics in solids have sparked broad interest in both fundamental physics and spintronic applications. As theoretically proposed, thermally excited magnons created by temperature gradients can be used to manipulate spin textures such as topological magnetic solitons. However, in practice, the effectiveness of such thermomagnonic torques has remained a problem. Here the dynamics of magnetic vortex cores driven by thermomagnonic torques are explored by high-resolution Lorentz Transmission Electron Microscopy. Large deflections of the magnetic vortex core transverse to the direction of the temperature gradient are observed. The magnitude of the contribution of the associated torques is determined using a generalized Thiele equation model. Our findings pave the path for thermomagnonic currents to manipulate magnetic domains and shed light on the relationship between temperature and spin. The authors gratefully acknowledge financial support from the DFG within SpinCaT (SPP 1538) and the BMBF.