Temperature dependence of the Spin Seebeck effect in a mixed valent manganite

Abstract

We report on temperature dependent measurements of the Longitudinal Spin Seebeck Effect (LSSE) in the mixed valent manganite La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$. By disentangling the contribution arising due to the Anisotropic Nernst effect, we observe that these two thermally driven phenomena vary disparately with temperature. In a narrow low temperature regime, the LSSE exhibits a $T^{0.55}$ dependence, which matches well with that predicted by the magnon-driven spin current model. Across the double exchange driven paramagnetic-ferromagnetic transition, the LSSE exponent is significantly higher than the magnetization one. These observations highlights the importance of individually ascertaining the temperature evolution of different mechanisms which contribute to the measured spin Seebeck signal.

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Cited by in corpus (6)

• Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids
• Role of spin mixing conductance in determining thermal spin pumping near the ferromagnetic phase transition in EuO_{1-x} and La2NiMnO6
• Cryogenic spin Seebeck effect
• Vector spin Seebeck effect and spin swapping effect in antiferromagnetic insulators with non-collinear spin structure
• Intrinsic Berry Curvature Driven Anomalous Hall and Nernst Effect in Co${}_2$MnSn
• Crystal orientation dependent spin pumping in Bi0.1Y2.9Fe5O12/Pt interface