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Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator

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 Neel 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. Calculations of spin current enhancement and spin mixing conductance are qualitatively consistent with the experimental results.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/614754
Date05 May 2016
CreatorsLin, Weiwei, Chen, Kai, Zhang, Shufeng, Chien, C. L.
ContributorsUniv Arizona, Dept Phys
PublisherAMER PHYSICAL SOC
Source SetsUniversity of Arizona
LanguageEnglish
Detected LanguageEnglish
TypeArticle
Rights© 2016 American Physical Society
Relationhttp://link.aps.org/doi/10.1103/PhysRevLett.116.186601

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