Berlin 2012 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 52: Poster II - Magnetic Heusler compounds, Magnetic shape memory alloys, Thin Films, Micro-/Nano-structured magnetic materials, Graphene, Spins in organics, Magnetic imaging, Surface Magnetism, Spin excitations/Torque, Spincaloric transport

MA 52.67: Poster

Freitag, 30. März 2012, 11:00–14:00, Poster A

Observation of Spin Seebeck Effect in Magnetic Semiconductor — •Ivan Soldatov, Christian Hess, Ludwig Schultz, and Rudolf Schaefer — IFW Dresden, Helmholtzstraße 20, 01069 Dresden

If a temperature gradient is applied along or perpendicular to a ferromagnetic /nonmagnetic metal interface, one can observe a pure spin current injected into the normal metal in direction perpendicular to the interface. This effect, called Spin Seebeck Effect (SSE), occupies a central role in the field of spin caloritronics, which explores the possibility of controlling spin currents by means of heat currents. In this work we investigate the SSE in a semiconducting ferromagnetic layer in Pt/GaMnAs/GaAs structures in conventional setup, purposed in pioneering work by Uchida (K. Uchida et al. Nature 455, 778 (2008)). The results include the absolute temperature dependence of the SSE dependence on the applied temperature gradient and the direction of applied magnetic field. The work is supported by the DFG-priority program Spin Caloric Transport