Journal
APPLIED PHYSICS LETTERS
Volume 119, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0050205
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Funding
- Cambridge Trust
- Jardine Foundation
- Winton Programme for the Physics of Sustainability
- EPSRC
- Deutsche Forschungsgemeinschaft through the International Collaborative Research Center [TRR160, B8, B9]
- Royal Society
- COST Action MAGNETOFON [CA17123]
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In the YIG|Pt system, we observed an increase in the spin Seebeck effect as temperature decreased, contrary to the behavior observed in electrical measurements. By analyzing the different contributions, we isolated the temperature dependence of the spin-mixing conductance and observed features correlated with the magnon spectrum bands in YIG.
We performed temperature-dependent optical pump-THz emission measurements in Y3Fe5O12 (YIG)|Pt from 5 K to room temperature in the presence of an externally applied magnetic field. We study the temperature dependence of the spin Seebeck effect and observe a continuous increase as temperature is decreased, opposite to what is observed in electrical measurements, where the spin Seebeck effect is suppressed as 0 K is approached. By quantitatively analyzing the different contributions, we isolate the temperature dependence of the spin-mixing conductance and observe features that are correlated with the bands of magnon spectrum in YIG.
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