Picosecond Spin Seebeck Effect

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

doi:10.1103/PhysRevLett.118.057201

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 journal › Article

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 language	English (US)
Article number	057201
Journal	Physical review letters
Volume	118
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.118.057201
State	Published - Feb 1 2017

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ASJC Scopus subject areas

Physics and Astronomy(all)

Cite this

Kimling, J., Choi, G. M., Brangham, J. T., Matalla-Wagner, T., Huebner, T., Kuschel, T., Yang, F., & Cahill, D. G. (2017). Picosecond Spin Seebeck Effect. Physical review letters, 118(5), [057201]. https://doi.org/10.1103/PhysRevLett.118.057201

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AU - Choi, Gyung Min

AU - Brangham, Jack T.

AU - Matalla-Wagner, Tristan

AU - Huebner, Torsten

AU - Kuschel, Timo

AU - Yang, Fengyuan

AU - Cahill, David G.

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AB - 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.

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10.1103/PhysRevLett.118.057201