Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Spin-dependent Transport Phenomena

MA 48.12: Vortrag

Freitag, 15. März 2013, 12:30–12:45, H23

Spin Accumulation in transition Metal thin Films from First Principles — •Frank Freimuth, Stefan Blügel, and Yuriy Mokrousov — Peter Grünberg Institut & Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

We present first-principles calculations of the spin accumulation in paramagnetic transition metal thin films due to applied in-plane electric fields. Two contributions to the spin accumulation are identified: The first contribution is the accumulated spin current from the spin Hall effect and depends on the spin diffusion length. The second contribution arises from the surface Rashba and the bulk Rashba effects. It is not directly related to the spin current flowing towards the surfaces and independent of the spin diffusion length. The spatial distributions of spin accumulation and spin current are also discussed and compared to model predictions. Furthermore, we discuss spin accumulation and resulting torques in thin ferromagnetic layers stacked on top of paramagnetic layers. This work is supported by the HGF-YIG grant VH-NG-513.