Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator.

  title={Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator.},
  author={Weiwei Lin and Kai Chen and Shufeng Zhang and C. L. Chien},
  journal={Physical review letters},
  volume={116 18},
We report a large enhancement of thermally injected spin current in normal metal (NM)/antiferromagnet (AF)/yttrium iron garnet (YIG), where a thin AF insulating layer of NiO or CoO can enhance the spin current from YIG to a NM by up to a factor of 10. The spin current enhancement in NM/AF/YIG, with a pronounced maximum near the Néel temperature of the thin AF layer, has been found to scale linearly with the spin-mixing conductance at the NM/YIG interface for NM=3d, 4d, and 5d metals… 

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