Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 48: Poster Session II
MA 48.11: Poster
Donnerstag, 10. März 2016, 15:00–18:00, Poster B1
Spin pumping at structurally engineered interfaces — •Sascha Keller1, Laura Mihalceanu1, Andres Conca1, Matthias R. Schweizer1, Jörg Lösch2, Burkard Hillebrands1, and Evan-gelos Th. Papaioannou1 — 1Fachbereich Physik, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 56, 67663 Kaiserslautern, Germany — 2Institut für Oberflächen- und Schichtanalytik (IFOS), Trippstadter Str. 120, 67663 Kaiserslautern, Germany
The spin pumping effect allows for the injection of a spin current from a ferromagnetic (FM) layer at ferromagnetic resonance (FMR) into an attached non-magnetic metal (NM) layer. The spin current is then subsequently transformed into a charge current by the inverse spin Hall effect (ISHE) inside the NM layer. Epitaxially grown FM/NM interfaces can strongly affect the spin pumping effect due to the structural quality of the interface and the intrinsic magnetic anisotropy of the FM. In this work we address the manipulation of these effects by structurally engineering the interfaces in a Fe/Pt model system. We show how spin pumping is affected with respect to crystal symmetry of the interface, grain size, Pt layer thickness and different capping layers (MgO, Pd and Au). Furthermore we analyze the shielding effect of Pt in the sub-skin-depth regime as well as rectification effects that are occurring with microwave excitation which are superimposed to the ISHE signal. Financial support by the Carl Zeiss Stiftung is gratefully acknowledged.