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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 Kriegner^1,3, Daniel Scheffler¹, Kamil Olejník³, Eva Schmoranzerová⁵, Lisa Michez⁶, Vincent Baltz⁴, Andy Thomas^1,7, Helena Reichlová^1,3, 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