Enhancement of spin-Seebeck effect by inserting ultra-thin Fe70Cu30 interlayer

D. Kikuchi, M. Ishida, K. Uchida, Z. Qiu, T. Murakami, E. Saitoh

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31 Citations (Scopus)


We report the longitudinal spin-Seebeck effects (LSSEs) for Pt/Fe70Cu30/BiY2Fe5O12 (BiYIG) and Pt/BiYIG devices. The LSSE voltage was found to be enhanced by inserting an ultra-thin Fe70Cu30 interlayer. This enhancement decays sharply with increasing the Fe70Cu30 thickness, suggesting that it is not due to bulk phenomena, such as a superposition of conventional thermoelectric effects, but due to interface effects related to the Fe70Cu30 interlayer. Combined with control experiments using Pt/Fe70Cu30 devices, we conclude that the enhancement of the LSSE voltage in the Pt/Fe70Cu30/BiYIG devices is attributed to the improvement of the spin-mixing conductance at the Pt/BiYIG interfaces.

Original languageEnglish
Article number082401
JournalApplied Physics Letters
Issue number8
Publication statusPublished - 2015 Feb 23


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