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Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect

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arxiv 1211.0139 v2 pith:MU24A5TZ submitted 2012-11-01 cond-mat.mtrl-sci cond-mat.mes-hall

Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect

T. Kikkawa , K. Uchida , Y. Shiomi , Z. Qiu , D. Hou , D. Tian , H. Nakayama , X.-F. Jin
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E. Saitoh
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classification cond-mat.mtrl-sci cond-mat.mes-hall
keywords effectproximityevenfreelongitudinallsselssesnernst
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This letter provides evidence for intrinsic longitudinal spin Seebeck effects (LSSEs) that are free from the anomalous Nernst effect (ANE) caused by an extrinsic proximity effect. We report the observation of LSSEs in Au/Y3Fe5O12 (YIG) and Pt/Cu/YIG systems, showing that LSSE appears even when the mechanism of the proximity ANE is clearly removed. In the conventional Pt/YIG structure, furthermore, we separate the LSSE from the ANE by comparing the voltages in different magnetization and temperature-gradient configurations; the ANE contamination was found to be negligibly small even in the Pt/YIG structure.

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