Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 64: Poster 1

MA 64.36: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-EG

Auto-oscillations in YIG/Pt microstructures driven by the spin Hall effect and the spin Seebeck effect — •Michael Schneider¹, Viktor Lauer¹, Thomas Meyer¹, Phillip Pirro¹, Thomas Brächer¹, Björn Heinz¹, Bert Lägel¹, Carsten Dubs², Caroline A. Ross³, Mehmet C. Onbasli³, Burkard Hillebrands¹, and Andrii V. Chumak¹ — ¹Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — ²INNOVENT e.V., Technologieentwicklung, 07745 Jena, Germany — ³Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

We report on the experimental results of the dynamics of spin Hall effect (SHE) and spin Seebeck effect (SSE) induced magnetization auto-oscillations in YIG/Pt microstructures. The investigated structures differ with respect to their geometry and fabrication methods. DC current pulses result in a generation of a spin current due to the SHE and in a Joule heating of the Pt layer. The heating leads to the formation of a thermal gradient and to the formation of a SSE spin current, which exerts an anti-damping torque and causes magnetization precession. Time-resolved Brillouin light scattering microscopy is used to investigate the magnetization precession as a function of time and spatial position. The interplay between different excited spin-wave modes is adressed. This research has been supported by: EU-FET Grant InSpin 612759, ERC Starting Grant 678309 MagnonCircuit, and DFG (DU 1427/2-1, and SE 1771/4-2 within SPP 1538).