Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.43: Poster
Tuesday, September 6, 2022, 17:30–20:00, P2
Spin-orbit torques in ferromagnetic heterostructures — •Misbah Yaqoob1, Fabian Kammerbauer2, Vitaliy Vasyuchka1, Gerhard Jakob2, Mathias Kläui2, and Mathias Weiler1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, Kaiserslautern, Germany — 2Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, Germany
Spin-orbit torques (SOTs) can be used to electrically control the spin dynamics, while inverse SOTs enable the electrical detection of spin dynamics. Here, based on theoretical predictions [1], we study the spin-to-charge conversion in ferromagnetic materials with high spin-orbit interaction. In particular, we chose the perpendicular magnetic anisotropy (PMA) multilayers CoNi and CoPt. We investigate the spin dynamics and SOTs of corresponding purely metallic ferromagnetic thin film in-plane anisotropy (IPA) / PMA hybrid systems using an inductive technique based on vector network analysis [2].
We observe substantial damping-like SOTs generated in the PMA layers. The SOTs in CoNi/Cu/CoFeB are comparable to those observed in Pt/CoFeB [3] and Pt/NiFe [4] heterostructures using the same technique and similar layer thicknesses.
References:
[1] A. Davidson et al., Phys. Lett. A 384, 126228 (2020).
[2] A. J. Berger et al., Phys. Rev. B 97, 94407 (2018).
[3] M. Meinert et al., Phys. Rev. Applied 14, 064011 (2020).
[4] A. J. Berger et al., Phys. Rev. B 98, 024402 (2018).