Spin Hall magnetoresistance at high temperatures

Ken Ichi Uchida; Zhiyong Qiu; Takashi Kikkawa; Ryo Iguchi; Eiji Saitoh

doi:10.1063/1.4907546

Spin Hall magnetoresistance at high temperatures

Ken Ichi Uchida, Zhiyong Qiu, Takashi Kikkawa, Ryo Iguchi, Eiji Saitoh

IMR - Integrated Research Division

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20 Citations (Scopus)

Abstract

The temperature dependence of spin Hall magnetoresistance (SMR) in Pt/Y₃Fe₅O₁₂ (YIG) bilayer films has been investigated in a high temperature range from room temperature to near the Curie temperature of YIG. The experimental results show that the magnitude of the magnetoresistance ratio induced by the SMR monotonically decreases with increasing the temperature and almost disappears near the Curie temperature. We found that, near the Curie temperature, the temperature dependence of the SMR in the Pt/YIG film is steeper than that of a magnetization curve of the YIG; the critical exponent of the magnetoresistance ratio is estimated to be 0.9. This critical behavior of the SMR is attributed mainly to the temperature dependence of the spin-mixing conductance at the Pt/YIG interface.

Original language	English
Article number	052405
Journal	Applied Physics Letters
Volume	106
Issue number	5
DOIs	https://doi.org/10.1063/1.4907546
Publication status	Published - 2015 Feb 2

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title = "Spin Hall magnetoresistance at high temperatures",

abstract = "The temperature dependence of spin Hall magnetoresistance (SMR) in Pt/Y3Fe5O12 (YIG) bilayer films has been investigated in a high temperature range from room temperature to near the Curie temperature of YIG. The experimental results show that the magnitude of the magnetoresistance ratio induced by the SMR monotonically decreases with increasing the temperature and almost disappears near the Curie temperature. We found that, near the Curie temperature, the temperature dependence of the SMR in the Pt/YIG film is steeper than that of a magnetization curve of the YIG; the critical exponent of the magnetoresistance ratio is estimated to be 0.9. This critical behavior of the SMR is attributed mainly to the temperature dependence of the spin-mixing conductance at the Pt/YIG interface.",

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T1 - Spin Hall magnetoresistance at high temperatures

AU - Uchida, Ken Ichi

AU - Qiu, Zhiyong

AU - Kikkawa, Takashi

AU - Iguchi, Ryo

AU - Saitoh, Eiji

PY - 2015/2/2

Y1 - 2015/2/2

N2 - The temperature dependence of spin Hall magnetoresistance (SMR) in Pt/Y3Fe5O12 (YIG) bilayer films has been investigated in a high temperature range from room temperature to near the Curie temperature of YIG. The experimental results show that the magnitude of the magnetoresistance ratio induced by the SMR monotonically decreases with increasing the temperature and almost disappears near the Curie temperature. We found that, near the Curie temperature, the temperature dependence of the SMR in the Pt/YIG film is steeper than that of a magnetization curve of the YIG; the critical exponent of the magnetoresistance ratio is estimated to be 0.9. This critical behavior of the SMR is attributed mainly to the temperature dependence of the spin-mixing conductance at the Pt/YIG interface.

AB - The temperature dependence of spin Hall magnetoresistance (SMR) in Pt/Y3Fe5O12 (YIG) bilayer films has been investigated in a high temperature range from room temperature to near the Curie temperature of YIG. The experimental results show that the magnitude of the magnetoresistance ratio induced by the SMR monotonically decreases with increasing the temperature and almost disappears near the Curie temperature. We found that, near the Curie temperature, the temperature dependence of the SMR in the Pt/YIG film is steeper than that of a magnetization curve of the YIG; the critical exponent of the magnetoresistance ratio is estimated to be 0.9. This critical behavior of the SMR is attributed mainly to the temperature dependence of the spin-mixing conductance at the Pt/YIG interface.

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Spin Hall magnetoresistance at high temperatures

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