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MA: Fachverband Magnetismus

MA 50: Poster II

MA 50.76: Poster

Freitag, 15. März 2013, 10:30–13:30, Poster D

Spin wave mediated heating in a magnetic insulator — •Vitaliy I. Vasyuchka, Alexander A. Serga, Andrii V. Chumak, and Burkard Hillebrands — FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

We present the results on spin wave mediated heating in films of a magnetic insulator using a thermography technique. The experiments were performed using a single-crystal yttrium iron garnet (YIG) film. We have found conditions when the direction of the heating of the sample can be controlled by an external magnetic field. In this case a large shift of the temperature maximum away from the excitation antenna of up to a few millimeters was observed. It was understood as a result of the interplay between the unidirectional heating and the diffusion of heat into the cold part of the YIG film. We found that the temperature maximum and its shift relative to the excitation antenna strongly depend on the speed of spin waves.

Financial support by the Deutsche Forschungsgemeinschaft (DFG) within Priority Program 1538 "Spin Caloric Transport" is gratefully acknowledged.