Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Poster I
MA 20.43: Poster
Dienstag, 19. März 2024, 16:30–19:00, Poster A
Signatures of slow magnetization relaxation in current reversal method anomalous Hall effect measurements — Sebastian Beckert1, Richard Schlitz2, •Gregor Skobjin2, Antonin Badura3, Miina Leiviskä4, Dominik Kriegner1,3, Daniel Scheffler1, Kamil Olejník3, Eva Schmoranzerová5, Lisa Michez6, Vincent Baltz4, Andy Thomas1,7, Helena Reichlová1,3, and Sebastian T. B. Goennenwein2 — 1IFMP, TU Dresden, Germany — 2Department of Physics, University of Konstanz, Germany — 3Institute of Physics ASCR, Czech Republic — 4Université Grenoble Alpes, CNRS, CEA, IRIG-Spintec, France — 5Faculty of Mathematics and Physics, Charles University, Czech Republic — 6Aix-Marseille Université, CNRS, CINaM, France — 7IFW Dresden, Germany
Slow magnetization relaxation processes are an important time-dependent property of magnetic materials. We show that a current-reversal based measurement method commonly used in magneto-transport experiments can be harnessed for the quantitative study of slow relaxation processes in magnetic thin films. More specifically, we exploit the anomalous Hall effect response to electrically screen the magnetization relaxation dynamics in micropatterned magnetic thin films. We apply our technique to different thin film materials with perpendicular magnetic anisotropy, as well as a potential altermagnetic compound. We will critically discuss the experimental results, and compare them to lock-in based transport measurements.
Keywords: Magnetization Relaxation; Anomalous Hall Effect; Perpendicular Magnetic Anisotropy; Altermagnetism; Thin films