Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator

被引：247

作者：

Lin, Weiwei ^{[1
]}

Chen, Kai ^{[2
]}

Zhang, Shufeng ^{[2
]}

Chien, C. L. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[2] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 18期

基金：

美国国家科学基金会;

关键词：

ROOM-TEMPERATURE; DEPENDENCE; ACCUMULATION; THICKNESS;

D O I：

10.1103/PhysRevLett.116.186601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：6

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