title: Spin-seebeck effect: a phonon driven spin distribution.
abstract: Here we report on measurements of the spin-Seebeck effect in 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.
authors.affiliation: Department of Mechanical Engineering, The Ohio State University, Columbus, 43210, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Jaworski
authors.forename: J
authors.initials: J
authors.lastname: Yang
authors.forename: S
authors.initials: S
authors.lastname: Mack
authors.forename: D D
authors.initials: DD
authors.lastname: Awschalom
authors.forename: R C
authors.initials: RC
authors.lastname: Myers
authors.forename: J P
authors.initials: JP
authors.lastname: Heremans