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Author Yagmur, A. ♦ Iguchi, R. ♦ Karube, S. ♦ Otani, Y. ♦ Uchida, K. ♦ Kondou, K. ♦ Kikkawa, T. ♦ Saitoh, E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ BISMUTH OXIDES ♦ EFFICIENCY ♦ EQUIPMENT ♦ FERRITE GARNETS ♦ INTERFACES ♦ IRON OXIDES ♦ LAYERS ♦ L-S COUPLING ♦ SEEBECK EFFECT ♦ TEMPERATURE GRADIENTS ♦ THERMOELECTRIC CONVERSION ♦ THICKNESS
Abstract The longitudinal spin Seebeck effect (SSE) in Bi{sub 2}O{sub 3}/Cu/yttrium-iron-garnet (YIG) devices has been investigated. When an out-of-plane temperature gradient is applied to the Bi{sub 2}O{sub 3}/Cu/YIG device, a spin current is generated across the Cu/YIG interface via the SSE and then converted into electric voltage due to the spin–orbit coupling at the Bi{sub 2}O{sub 3}/Cu interface. The sign of the SSE voltage in the Bi{sub 2}O{sub 3}/Cu/YIG devices is opposite to that induced by the conventional inverse spin Hall effect in Pt/YIG devices. The SSE voltage in the Bi{sub 2}O{sub 3}/Cu/YIG devices disappears in the absence of the Bi{sub 2}O{sub 3} layer and its thermoelectric conversion efficiency is independent of the Cu thickness, indicating the important role of the Bi{sub 2}O{sub 3}/Cu interface. This result demonstrates that not only the bulk inverse spin Hall effect but also the spin–orbit coupling near the interface can be used for SSE-based thermoelectric generation.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-06-13
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 24


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