Picosecond spin Seebeck effect

Johannes Kimling; Gyung-Min Choi; Jack T. Brangham; Tristan Matalla-Wagner; Torsten Huebner; Timo Kuschel; Fengyuan Yang; David G. Cahill

doi:10.1103/PhysRevLett.118.057201

Picosecond spin Seebeck effect

Mesoscale and Nanoscale Physics 2017-02-07 v1

Authors: 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 $^{-1}$ .

Keywords

spin transport spin-orbit coupling ultrafast magnetization dynamics

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@article{arxiv.1608.00702,
  title  = {Picosecond spin Seebeck effect},
  author = {Johannes Kimling and Gyung-Min Choi and Jack T. Brangham and Tristan Matalla-Wagner and Torsten Huebner and Timo Kuschel and Fengyuan Yang and David G. Cahill},
  journal= {arXiv preprint arXiv:1608.00702},
  year   = {2017}
}

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16 pages, 4 figures, 1 table

Picosecond spin Seebeck effect

Abstract

Keywords

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