Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 42: Posters Magnetism I
MA 42.39: Poster
Wednesday, March 18, 2020, 15:00–18:00, P3
Spin Hall Magnetoresistance in normal metal/yttrium iron garnet heterostructures — •E. Karadza1,2, T. Wimmer1,2, J. Gueckelhorn1,2, R. Gross1,2,3, H. Huebl1,2,3, and M. Althammer1,2 — 1Walther-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
In the field of spintronics, the generation and detection of pure spin currents, i.e. the flow of angular momentum without an accompanying charge current, is an important building block for future spin logic applications. For the generation and detection of pure spin currents the (inverse) spin Hall effect (SHE) in metals with spin-orbit coupling is conveniently utilized. The SHE allows to convert a charge current into a pure spin current. The efficiency of this process is characterized by the spin Hall angle (SHA). Over the last decade many different materials have been investigated to increase the SHA. Here, we present our recent results on determining the SHA via spin Hall magnetoresistance measurements in normal metal (Pt, PtAu)/yttrium iron garnet heterostructures. Our systematic investigation as a function of the normal metal thickness allows us to identify promising materials for efficient pure spin current injection into magnetically ordered insulators. Financial support by the DFG is gratefully acknowledged.