Spin-Seebeck effects in Ni81 Fe19 / Pt films

K. Uchida; T. Ota; K. Harii; S. Takahashi; S. Maekawa; Y. Fujikawa; E. Saitoh

doi:10.1016/j.ssc.2009.10.045

Spin-Seebeck effects in Ni₈₁ Fe₁₉ / Pt films

K. Uchida, T. Ota, K. Harii, S. Takahashi, S. Maekawa, Y. Fujikawa, E. Saitoh

Research output: Contribution to journal › Article › peer-review

75 Citations (Scopus)

Abstract

The spin-Seebeck effect (SSE) converts a heat current into a spin current, a flow of spin angular momentum, and spin voltage, the driving force for nonequilibrium spin currents, in a ferromagnetic metal. In this study, the SSE in a ferromagnetic Ni₈₁Fe₁₉ film has been investigated by means of the inverse spin-Hall effect (ISHE) in a Pt film at room temperature. The experimental results measured in the Ni₈₁Fe₁₉/Pt system show that the sign of the thermally induced spin voltage is reversed between the higher- and lower-temperature ends of the Ni₈₁Fe₁₉ film. The ISHE in the Pt film allows us to detect the SSE signal with high sensitivity and to separate it from extrinsic thermoelectric effects.

Original language	English
Pages (from-to)	524-528
Number of pages	5
Journal	Solid State Communications
Volume	150
Issue number	11-12
DOIs	https://doi.org/10.1016/j.ssc.2009.10.045
Publication status	Published - 2010 Mar

Keywords

A. Metals
A. Thin films
C. Spin-orbit effects

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/j.ssc.2009.10.045

Cite this

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title = "Spin-Seebeck effects in Ni81 Fe19 / Pt films",

abstract = "The spin-Seebeck effect (SSE) converts a heat current into a spin current, a flow of spin angular momentum, and spin voltage, the driving force for nonequilibrium spin currents, in a ferromagnetic metal. In this study, the SSE in a ferromagnetic Ni81Fe19 film has been investigated by means of the inverse spin-Hall effect (ISHE) in a Pt film at room temperature. The experimental results measured in the Ni81Fe19/Pt system show that the sign of the thermally induced spin voltage is reversed between the higher- and lower-temperature ends of the Ni81Fe19 film. The ISHE in the Pt film allows us to detect the SSE signal with high sensitivity and to separate it from extrinsic thermoelectric effects.",

keywords = "A. Metals, A. Thin films, C. Spin-orbit effects",

author = "K. Uchida and T. Ota and K. Harii and S. Takahashi and S. Maekawa and Y. Fujikawa and E. Saitoh",

note = "Funding Information: The authors thank G. E. W. Bauer, B. J. van Wees, J. Ieda, W. Koshibae, G. Tatara, S. Murakami, K. M. Itoh, and M. Matoba for valuable discussions. This work was supported by a Grant-in-Aid for Scientific Research in Priority Area {\textquoteleft}Creation and control of spin current{\textquoteright} (19048028) from MEXT, Japan, a Grant-in-Aid for Scientific Research (A) from MEXT, Japan, the global COE for the {\textquoteleft}Materials integration international center of education and research{\textquoteright} from MEXT, Japan, a Grant for Industrial Technology Research from NEDO, Japan, and a Fundamental Research Grant from TRF, Japan. ",

year = "2010",

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doi = "10.1016/j.ssc.2009.10.045",

language = "English",

volume = "150",

pages = "524--528",

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T1 - Spin-Seebeck effects in Ni81 Fe19 / Pt films

AU - Uchida, K.

AU - Ota, T.

AU - Harii, K.

AU - Takahashi, S.

AU - Maekawa, S.

AU - Fujikawa, Y.

AU - Saitoh, E.

N1 - Funding Information: The authors thank G. E. W. Bauer, B. J. van Wees, J. Ieda, W. Koshibae, G. Tatara, S. Murakami, K. M. Itoh, and M. Matoba for valuable discussions. This work was supported by a Grant-in-Aid for Scientific Research in Priority Area ‘Creation and control of spin current’ (19048028) from MEXT, Japan, a Grant-in-Aid for Scientific Research (A) from MEXT, Japan, the global COE for the ‘Materials integration international center of education and research’ from MEXT, Japan, a Grant for Industrial Technology Research from NEDO, Japan, and a Fundamental Research Grant from TRF, Japan.

PY - 2010/3

Y1 - 2010/3

N2 - The spin-Seebeck effect (SSE) converts a heat current into a spin current, a flow of spin angular momentum, and spin voltage, the driving force for nonequilibrium spin currents, in a ferromagnetic metal. In this study, the SSE in a ferromagnetic Ni81Fe19 film has been investigated by means of the inverse spin-Hall effect (ISHE) in a Pt film at room temperature. The experimental results measured in the Ni81Fe19/Pt system show that the sign of the thermally induced spin voltage is reversed between the higher- and lower-temperature ends of the Ni81Fe19 film. The ISHE in the Pt film allows us to detect the SSE signal with high sensitivity and to separate it from extrinsic thermoelectric effects.

AB - The spin-Seebeck effect (SSE) converts a heat current into a spin current, a flow of spin angular momentum, and spin voltage, the driving force for nonequilibrium spin currents, in a ferromagnetic metal. In this study, the SSE in a ferromagnetic Ni81Fe19 film has been investigated by means of the inverse spin-Hall effect (ISHE) in a Pt film at room temperature. The experimental results measured in the Ni81Fe19/Pt system show that the sign of the thermally induced spin voltage is reversed between the higher- and lower-temperature ends of the Ni81Fe19 film. The ISHE in the Pt film allows us to detect the SSE signal with high sensitivity and to separate it from extrinsic thermoelectric effects.

KW - A. Metals

KW - A. Thin films

KW - C. Spin-orbit effects

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