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Phonon driven spin distribution due to the spin-Seebeck effect

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arxiv 1102.1024 v1 pith:NSGG7OF6 submitted 2011-02-04 cond-mat.mtrl-sci

Phonon driven spin distribution due to the spin-Seebeck effect

C. M. Jaworski , J. Yang , S. Mack , D. D. Awschalom , R. C. Myers , J. P. Heremans This is my paper
classification cond-mat.mtrl-sci
keywords effectgamnasspinspin-seebeckconductivitydistributionpowertemperature
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Here we report on measurements of the spin-Seebeck effect of GaMnAs over an extended temperature range alongside the thermal conductivity, specific heat, magnetization, and thermoelectric power. The amplitude of the spin-Seebeck effect in GaMnAs scales with the thermal conductivity of the GaAs substrate and the phonon-drag contribution to the thermoelectric power of the GaMnAs, demonstrating that phonons drive the spin redistribution. A phenomenological model involving phonon-magnon drag explains the spatial and temperature dependence of the measured spin distribution.

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