Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 15: Magnetism Poster A
MA 15.8: Poster
Dienstag, 2. April 2019, 10:00–13:00, Poster E
Optimizing spin-orbit torques and DMI in multilayer heterostructures — •Franziska Martin1, Joel Cramer1,2, Kyujoon Lee1, Tom Seifert3, Alexander Kronenberg1, Felix Fuhrmann1, Gerhard Jakob1,2, Martin Jourdan1,2, Tobias Kampfrath3,4, and Mathias Kläui1,2 — 1Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany — 2Graduate School of Excellence Materials Science in Mainz, 55128 Mainz, Germany — 3Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany — 4Department of Physics, Freie Universität Berlin, 14195 Berlin, Germany
The use of thin films in magnetic storage devices requires suitable materials that enable for instance ultra-fast and low power domain wall motion. The research of recent years has shown that tri-layers consisting of a heavy metal (HM), a ferromagnetic (FM) and an oxide layer are a promising system for spintronic applications [1]. In these, the combination of large spin-orbit torques [2] and chiral Néel domain walls due to the Dzyaloshinskii-Moriya interaction (DMI) [1] allow for fast domain wall motion. We have recently identified CuIr alloys with strong spin-orbit coupling leading to a large spin hall angle in the HM layer [2][3]. Making use of the large spin-orbit torques in Cu60Ir40, we quantify the DMI in a tri-layer system by current induced domain wall motion [4]. References: [1] A. Brataas et al., Nature Nano 9, 86 (2014), [2] J. Cramer et al., Nano Lett. 18, 1064 (2018), [3] T. Seifert et al., Nature Photon. 10, 483 (2016), [4] F. Martin et al., (in preparation)