Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 107: Focus Session: Spinorbitronics - From Efficient Charge/Spin Conversion Based on Spin-Orbit Coupling to Chiral Magnetic Skyrmions III (joint session MA/TT)
TT 107.3: Vortrag
Freitag, 16. März 2018, 10:15–10:30, H 1012
Skyrmions like it Hot - Temperature Dependence of the Skyrmion Hall Effect — •Kai Litzius1,2,3, Pedram Bassirian1, Jonathan Leliaert4, Sascha Kromin1, Jakub Zazvorka1, Ivan Lemesh5, Nico Kerber1,2, Alexandra Churikova5, Daniel Heinze1, Niklas Keil1, Markus Weigand3, Gisela Schütz3, Geoffrey S. D. Beach5, and Mathias Klaeui1,2 — 1Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany — 2Graduate School of Excellence Materials Science in Mainz, 55128 Mainz, Germany — 3Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany — 4Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, B-9000 Ghent, Belgium — 5Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
Magnetic skyrmions are topologically stabilized nanoscale spin structures that show promise for future spintronic devices. It was found very recently that during their dynamics a sizeable skyrmion Hall angle (SkHA) occurs that surprisingly depends on the skyrmion velocity. [1,2] Different theoretical models have been put forward for the creep [2] and viscous flow [1] regime. By X-ray microscopy, we investigate reproducible skyrmion trajectories at varying temperatures. We find that the angle is independent of the temperature when plotted against the skyrmion velocity and identify two different mechanisms that lead to distinctly different spin Hall angles in the creep and the flow regimes. References: [1] K. Litzius et al., Nat. Phys. 13, 170-175 (2017). [2] W. Jiang et al., Nat. Phys. 13, 162-169 (2017).