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Paper detail

Giant Magneto-Seebeck Effect in Spin Valves

Giant magneto-Seebeck (GMS) effect was observed in Co/Cu/Co and NiFe/Cu/Co spin valves. Their Seebeck coefficients in parallel state was larger than that in antiparallel state, and GMS ratio defined as (SAP-SP)/SP could reach -9% in our case. The GMS originated not only from trivial giant magnetoresistance but also from spin current generated due to spin polarized thermoelectric conductivity in ferromagnetic materials and subsequent modulation of the spin current by spin configurations in spin valves. Simple Mott two-channel model reproduced a -11% GMS for the Co/Cu/Co spin valves, qualitatively consistent with our observations. The GMS effect could be applied simultaneously sensing temperature gradient and magnetic field and also be possibly applied to determine spin polarization of thermoelectric conductivity and Seebeck coefficient in ferromagnetic thin films.

preprint2015arXivOpen access
X. M. ZhangC. H. WanZ. H. YuanH. WuQ. T. ZhangX. ZhangB. S. TaoC. FangX. F. Han
cond-mat.mtrl-sci
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X. M. ZhangC. H. WanZ. H. YuanH. WuQ. T. ZhangX. ZhangB. S. TaoC. FangX. F. Han

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