Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures

Ken-ichi Uchida; Takashi Kikkawa; Asuka Miura; Junichiro Shiomi; Eiji Saitoh

doi:10.1103/PhysRevX.4.041023

Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures

Materials Science 2015-05-28 v2 Mesoscale and Nanoscale Physics

Authors: Ken-ichi Uchida , Takashi Kikkawa , Asuka Miura , Junichiro Shiomi , Eiji Saitoh

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Abstract

This article reports temperature-dependent measurements of longitudinal spin Seebeck effects (LSSEs) in Pt/Y $_3$ Fe $_5$ O $_{12}$ (YIG)/Pt systems in a high temperature range from room temperature to above the Curie temperature of YIG. The experimental results show that the magnitude of the LSSE voltage in the Pt/YIG/Pt systems rapidly decreases with increasing the temperature and disappears above the Curie temperature. The critical exponent of the LSSE voltage in the Pt/YIG/Pt systems at the Curie temperature was estimated to be 3, which is much greater than that for the magnetization curve of YIG. This difference highlights the fact that the mechanism of the LSSE cannot be explained in terms of simple static magnetic properties in YIG.

Keywords

longitudinal spin Seebeck effect high temperature YIG Pt/YIG/Pt Curie temperature critical exponent magnetization

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@article{arxiv.1408.2972,
  title  = {Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures},
  author = {Ken-ichi Uchida and Takashi Kikkawa and Asuka Miura and Junichiro Shiomi and Eiji Saitoh},
  journal= {arXiv preprint arXiv:1408.2972},
  year   = {2015}
}

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9 pages, 5 figures, 1 table

Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures

Abstract

Keywords

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