Dresden 2020 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 20: PhD Focus Session: Symposium on SStrange Bedfellows – Magnetism Meets Superconductivity" (joint session MA/AKjDPG)

MA 20.8: Vortrag

Dienstag, 17. März 2020, 12:30–12:45, HSZ 04

Inductive detection of field- and damping-like inverse spin-orbit torques in superconductor/ferromagnet heterostructures — •Manuel Müller1,2, Lukas Liensberger1,2, Luis Flacke1,2, Hans Huebl1,2,3, Akashdeep Kamra4, Wolfgang Belzig5, Rudolf Gross1,2,3, Mathias Weiler1,2, and Matthias Althammer1,21Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Munich Center for Quantum Science and Technology (MCQST), München, Germany — 4Norwegian University of Science and Technology, Trondheim, Norway — 5Fachbereich Physik, Universität Konstanz, Konstanz, Germany

Proximity effects at superconductor(SC)/ferromagnet(FM) interfaces provide novel functionality in the field of superconducting spintronics. We present experiments, where we probe the angular momentum transport across the SC/FM interface using a phase resolve broadband ferromagnetic resonance (bbFMR) technique that allows to measure both field- and damping-like inverse spin orbit torques (iSOT)[1]. We extend this iSOT analysis to make it applicable for SC/FM-bilayers and study iSOTs in a series of multilayers based on NbN/Ni80Fe20 as a function of temperature. We observe distinct changes in damping-like and field-like iSOT at the superconducting transition temperature Tc. Our findings reveal symmetry and strength of iSOTs at the SC/FM interface and provide guidance for future superconducting spintronics devices.   [1] A. Berger. Phys. Rev. B. 97: 94407. (2018).

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