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スピンと熱の新しいかかわり

New interplay of spin and heat

安立 裕人; 前川 禎通

Adachi, Hiroto; Maekawa, Sadamichi

Recent progress in the field of thermoelectrics and thermo-spintronics is reviewed by focusing on the role of spins. Two topics are discussed, i.e., the manipulation of the spin degrees of freedom to enhance the thermoelectric effect, and the observation of the spin Seebeck effect. In the first part of the review, we introduce cobalt oxide as a superior thermoelectric material, and clarify why it has a large Seebeck effect. In the latter half, we discuss the recently observed spin Seebeck effect, and argue that a scenario based on thermal spin current mediated by spin-wave excitations can account for the observed phenomenon.

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