Picosecond Spin Seebeck Effect

Johannes Kimling, Gyung Min Choi, Jack T. Brangham, Tristan Matalla-Wagner, Torsten Huebner, Timo Kuschel, Fengyuan Yang, David G. Cahill

Research output: Contribution to journalArticle

Abstract

We report time-resolved magneto-optic Kerr effect measurements of the longitudinal spin Seebeck effect in normal metal/Y3Fe5O12 bilayers driven by an interfacial temperature difference between electrons and magnons. The measured time evolution of spin accumulation induced by laser excitation indicates transfer of angular momentum across normal metal/Y3Fe5O12 interfaces on a picosecond time scale, too short for contributions from a bulk temperature gradient in an yttrium iron garnet. The product of spin-mixing conductance and the interfacial spin Seebeck coefficient determined is of the order of 108 A m-2 K-1.

Original languageEnglish (US)
Article number057201
JournalPhysical review letters
Volume118
Issue number5
DOIs
StatePublished - Feb 1 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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