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Improvement of Mixing Conductance and Spin-Seebeck Effect at Fe Interface Treatment

  • Y. Iwasaki (a1), M. Ishida (a1) (a2), A. Kirihara (a1) (a2), K. Ihara (a1) (a2), H. Someya (a1) (a2), K. Uchida (a3) (a4), E. Saitoh (a2) (a3) (a5) (a6), T. Murakami (a1) and S. Yorozu (a1) (a2)...


In the previous work, it is reported that the Spin-Seebeck effect (SSE), which refer to the generation of a spin current from a temperature gradient, can be enhanced by Fe interface treatment. Here, we investigated the Fe thickness (d Fe ) dependency of spin-Seebeck voltage (V SSE ) and mixing conductance (g r ) in Pt/Fe/Bi:YIG/SGGG system. As a result, magnitude of V SSE had a peak at d Fe ≓ 1 ML (monolayer , ≓ 0.3 mm), and also increase of g r was saturated at this point. It suggests that V SSE increase with increasing g r when d Fe is smaller than 1.0 ML. For the case in which d Fe is larger than 1.0ML, however, V SSE decreases due to a spin current decay in Fe layer with a constant g r . These experimental results are consistent with previous theoretical works.


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