Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures

Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures

We report temperature-dependent measurements of longitudinal spin Seebeck effects (LSSEs) in Pt/Y3Fe5O12 (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 sys...

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Bibliographic Details
Published in:Physical review. X Vol. 4; no. 4; p. 041023
Main Authors: Uchida, Ken-ichi, Kikkawa, Takashi, Miura, Asuka, Shiomi, Junichiro, Saitoh, Eiji
Format: Journal Article
Language:English
Published: College Park American Physical Society 01-11-2014
Subjects:
Angular momentum
Curie temperature
Current sources
Electric potential
High temperature
Insulators
Magnetic materials
Magnetic properties
Magnetism
Magnetization
Magnetization curves
Room temperature
Seebeck effect
Spintronics
Temperature
Temperature dependence
Temperature gradients
Temperature sensors
Thin films
Voltage
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Summary:We report temperature-dependent measurements of longitudinal spin Seebeck effects (LSSEs) in Pt/Y3Fe5O12 (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 is 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.
ISSN:2160-3308
2160-3308
DOI:10.1103/PhysRevX.4.041023