Regensburg 2013 – scientific programme

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MA: Fachverband Magnetismus

MA 50: Poster II

MA 50.81: Poster

Friday, March 15, 2013, 10:30–13:30, Poster D

Correlation of Inverse Spin Hall Effect to the crystal growth of magnetic films — •Philipp Fuhrmann, Evangelos Papaioannou, and Burkard Hillebrands — Fachbereich Physik, Technische Universität Kaiserslautern, D-67663 Kaiserslautern, Germany

Spin transfer torque and spin pumping phenomena in magnetic hetero structures have attracted a lot of interest in the field of spintronics. Spin pumping and Inverse Spin Hall Effect (ISHE) in ferromagnetic / normal metal systems have been extensively investigated over the last years, covering dependencies on layer thickness and choice of material. However no systematic studies have been performed regarding the influence of the growth modes of the ferromagnetic / normal metal systems on spin pumping and ISHE.

In this work we present the correlation of crystal growth to ISHE. Structural properties of high quality epitaxial Fe films, covered with a Pt layer, are shown by Scanning Tunnel Microscopy and X-Ray Reflectivity. Characteristic roughness parameters are extracted by height-height correlation analysis. Magnetization properties are studied with the help of longitudinal Kerr effect. We show the dependence of ISHE on the crystal quality, and we correlate ISHE to surface roughness and magnetic anisotropies.