Picosecond Spin Seebeck Effect.
Phys Rev Lett
; 118(5): 057201, 2017 Feb 03.
Article
en En
| MEDLINE
| ID: mdl-28211731
ABSTRACT
We report time-resolved magneto-optic Kerr effect measurements of the longitudinal spin Seebeck effect in normal metal/Y_{3}Fe_{5}O_{12} 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/Y_{3}Fe_{5}O_{12} 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 10^{8} A m^{-2} K^{-1}.
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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2017
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Article
País de afiliación:
Estados Unidos