期刊
APPLIED PHYSICS LETTERS
卷 112, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5019934
关键词
-
资金
- Deutsche Forschungsgemeinschaft [SPP 1538, GO 944/4, TH 1399/5]
- BMBF Project GUC-LSE [FKZ: 01DK17007]
We study the evolution of magnetoresistance with temperature in thin film bilayers consisting of platinum and antiferromagnet Cr2O3 with its easy axis out of the plane. We vary the temperature from 20 degrees C to 60 degrees C, in the vicinity of the Neel temperature of Cr2O3 of approximately 37 degrees C. The magnetoresistive response is recorded during rotations of the external magnetic field in three mutually orthogonal planes. A large magnetoresistance having a symmetry consistent with a positive spin Hall magnetoresistance is observed in the paramagnetic phase of Cr2O3, which however vanishes when cooling to below the Neel temperature. Compared to analogous experiments in a Gd3Ga5O12/Pt bilayer, we conclude that a paramagnetic moment in the insulator induced by an applied magnetic field is not sufficient to explain the observed magnetoresistance. We speculate that the type of magnetic moment at the interface qualitatively impacts the spin angular momentum transfer, with the 3d moments of Cr sinking angular momentum much more efficiently as compared to the more localized 4f moments of Gd. Published by AIP Publishing.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据