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Temporal evolution of inverse spin Hall effect voltage in a magnetic insulator-nonmagnetic metal structure

2011; American Institute of Physics; Volume: 99; Issue: 18 Linguagem: Inglês

10.1063/1.3658398

1520-8842

M. Benjamin Jungfleisch, Andrii V. Chumak, Vitaliy I. Vasyuchka, A. A. Serga, Björn Obry, Helmut Schultheiß, P. A. Beck, A. D. Karenowska, Eiji Saitoh, B. Hillebrands,

Theoretical and Computational Physics

It is demonstrated that the temporal evolution of a spin-wave induced inverse spin Hall effect voltage in a magnetic insulator–nonmagnetic metal structure is distinctly different from that of the directly excited (microwave pulse driven) spin-wave mode from which it originates. The differences in temporal behavior provide compelling evidence that incoherent secondary spin-wave modes, having a range of different characteristic lifetimes, make an important contribution to spin pumping at the insulator-metal interface.