Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator
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PhysRevLett.116.186601.pdf
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AMER PHYSICAL SOCCitation
Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator 2016, 116 (18) Physical Review LettersJournal
Physical Review LettersRights
© 2016 American Physical Society.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
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.ISSN
0031-90071079-7114