Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 48: Spin-dependent Transport Phenomena
MA 48.1: Vortrag
Freitag, 15. März 2013, 09:30–09:45, H23
Electrical detection of inverse spin Hall effect induced by spin pumping — •Yuriy Aleksandrov1,2, Jürgen Lindner1, Michael Farle3, Irina Rod3, and Horst Zähres3 — 1HZDR, Dresden, Germany — 2TU Dresden, Dresden, Germany — 3Universität Duisburg-Essen, Duisburg, Germany
Spin pumping driven by ferromagnetic resonance (FMR) injects a spin current through a simple ferromagnetic (FM)/paramagnetic (PM) interface into a PM layer [1]. Due to the inverse spin Hall effect (ISHE), arising from the spin-orbit coupling in the PM layer, the spin current is converted into a charge current. As a result transverse electromotive force perpendicular to the applied magnetic field and to the microwave field is produced [2]. Here we present direct measurements of the ISHE induced by spin pumping in Py/Pt bilayer. We observe a 4mT FMR linewidth broadening for the samples with Pt capping layers due to spin pumping. We also find that the electromotive force varies systematically with changing microwave power and frequency, magnetic-field angle, or temperature. This is consistent with the predictions based on the Landau-Lifshitz-Gilbert equation combined with the models of the ISHE and spin pumping.
Financially suppoted by DFG, SFB 491.
[1]Tserkovnyak et al. PRL., 88:117601, Feb 2002.
[2]Mosendz et al. PR B 82, 214403, 2010