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arXiv · 1608.00702

Picosecond spin Seebeck effect

Johannes Kimling·Gyung-Min Choi·Jack T. Brangham·Tristan Matalla-Wagner·Torsten Huebner·Timo Kuschel·Fengyuan Yang·David G. Cahill
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Abstract

We report time-resolved magneto-optic Kerr effect measurements of the longitudinal spin Seebeck effect driven by an interfacial temperature difference between itinerant electrons and magnons. The measured time-evolution of spin accumulation induced by laser-excitation indicates transfer of angular momentum across Au/Y$_3$Fe$_5$O$_{12}$ and Cu/Y$_3$Fe$_5$O$_{12}$ interfaces on a picosecond time-scale. The product of spin-mixing conductance and interfacial spin Seebeck coefficient determined is of the order of $10^8$ A m$^{-2}$ K$^{-1}$.

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Johannes Kimling, Gyung-Min Choi, Jack T. Brangham, Tristan Matalla-Wagner, Torsten Huebner, Timo Kuschel, Fengyuan Yang, David G. Cahill. 2016-08-02. Picosecond spin Seebeck effect. https://doi.org/10.1103/physrevlett.118.057201

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