Temperature dependence of the picosecond spin Seebeck effect

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 decr...

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Bibliographic Details
Published in:Applied physics letters 2021-07, Vol.119 (3)
Main Authors: Kholid, Farhan Nur, Hamara, Dominik, Terschanski, Marc, Mertens, Fabian, Bossini, Davide, Cinchetti, Mirko, McKenzie-Sell, Lauren, Patchett, James, Petit, Dorothée, Cowburn, Russell, Robinson, Jason, Barker, Joseph, Ciccarelli, Chiara
Format: Article
Language:English
Subjects:
Applied physics
Electrical measurement
Magnons
Resistance
Room temperature
Seebeck effect
Temperature
Temperature dependence
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0050205