Journal
PHYSICAL REVIEW X
Volume 4, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.4.041023
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Funding
- PRESTO-JST Phase Interfaces for Highly Efficient Energy Utilization
- CREST-JST Creation of Nanosystems with Novel Functions through Process Integration [25707029]
- MEXT, Japan [26600067, 24244051, 26103005]
- LCIMR of Tohoku University
- Sumitomo Foundation
- Tanikawa Fund Promotion of Thermal Technology
- Casio Science Promotion Foundation
- Iwatani Naoji Foundation
- Grants-in-Aid for Scientific Research [26103005, 25707029, 26600067] Funding Source: KAKEN
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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.
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