期刊
PHYSICAL REVIEW LETTERS
卷 116, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.186601
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资金
- U.S. Department of Energy, Office of Science, Basic Energy Science [DE-SC0009390]
- C-SPIN, one of six centers of STARnet
- SRC program - MARCO
- DARPA
- National Science Foundation [ECCS-1404542]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1404542] Funding Source: National Science Foundation
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.
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