Magnetotransport in metal/insulating-ferromagnet heterostructures: Spin Hall magnetoresistance or magnetic proximity effect
Magnetotransport in metal/insulating-ferromagnet heterostructures: Spin Hall magnetoresistance or magnetic proximity effect
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DOI：
10.1103/physrevb.92.060402
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发表时间：
2015-03
影响因子：
3.7
通讯作者：
Xiang Zhou;Li Ma;Zhong Shi;W. Fan;Jian‐Guo Zheng;R. Evans;Shiming Zhou
中科院分区：
文献类型：
--
作者：
Xiang Zhou;Li Ma;Zhong Shi;W. Fan;Jian‐Guo Zheng;R. Evans;Shiming Zhou
We study the anomalous Hall-like effect (AHLE) and the effective anisotropic magnetoresistance (EAMR) in antiferromagnetic $\ensuremath{\gamma}\ensuremath{-}{\mathrm{IrMn}}_{3}/{\mathrm{Y}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}\phantom{\rule{0.28em}{0ex}}(\mathrm{YIG})$ and Pt/YIG heterostructures. For $\ensuremath{\gamma}\ensuremath{-}{\mathrm{IrMn}}_{3}/\mathrm{YIG}$, the EAMR and the AHLE resistivity change sign with temperature due to the competition between the spin Hall magnetoresistance (SMR) and the magnetic proximity effect (MPE) induced by the interfacial antiferromagnetic uncompensated magnetic moment. In contrast, for Pt/YIG, the AHLE resistivity changes sign with temperature whereas no sign change is observed in the EAMR. This is because the MPE and the SMR play a dominant role in the AHLE and the EAMR, respectively. As different types of galvanomagnetic properties, the AHLE and the EAMR have proved vital in disentangling the MPE and the SMR in metal/insulating-ferromagnet heterostructures.
We study the anomalous Hall-like effect (AHLE) and the effective anisotropic magnetoresistance (EAMR) in antiferromagnetic $\ensuremath{\gamma}\ensuremath{-}{\mathrm{IrMn}}_{3}/{\mathrm{Y}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}\phantom{\rule{0.28em}{0ex}}(\mathrm{YIG})$ and Pt/YIG heterostructures. For $\ensuremath{\gamma}\ensuremath{-}{\mathrm{IrMn}}_{3}/\mathrm{YIG}$, the EAMR and the AHLE resistivity change sign with temperature due to the competition between the spin Hall magnetoresistance (SMR) and the magnetic proximity effect (MPE) induced by the interfacial antiferromagnetic uncompensated magnetic moment. In contrast, for Pt/YIG, the AHLE resistivity changes sign with temperature whereas no sign change is observed in the EAMR. This is because the MPE and the SMR play a dominant role in the AHLE and the EAMR, respectively. As different types of galvanomagnetic properties, the AHLE and the EAMR have proved vital in disentangling the MPE and the SMR in metal/insulating-ferromagnet heterostructures.