Interplay of Rashba effect and spin Hall effect in perpendicular Pt/Co/MgO magnetic multilayers

The interplay of the Rashba effect and the spin Hall effect originating from current induced spin–orbit coupling was investigated in the as-deposited and annealed Pt/Co/MgO stacks with perpendicular magnetic anisotropy. The above two effects were analyzed based on Hall measurements under external ma...

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Published inChinese physics B Vol. 25; no. 7; pp. 419 - 422
Main Author 赵云驰 杨光 董博闻 王守国 王超 孙阳 张静言 于广华
Format Journal Article
LanguageEnglish
Published 01.07.2016
Subjects
MgO
Rashba效应
垂直磁各向异性
直流电流
相互作用
磁性多层膜
自旋轨道耦合
霍尔效应
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/25/7/077501

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Abstract The interplay of the Rashba effect and the spin Hall effect originating from current induced spin–orbit coupling was investigated in the as-deposited and annealed Pt/Co/MgO stacks with perpendicular magnetic anisotropy. The above two effects were analyzed based on Hall measurements under external magnetic fields longitudinal and vertical to dc current,respectively. The coercive field as a function of dc current in vertical mode with only the Rashba effect involved decreases due to thermal annealing. Meanwhile, spin orbit torques calculated from Hall resistance with only the spin Hall effect involved in the longitudinal mode decrease in the annealed sample. The experimental results prove that the bottom Pt/Co interface rather than the Co/MgO top one plays a more critical role in both Rashba effect and spin Hall effect.
AbstractList The interplay of the Rashba effect and the spin Hall effect originating from current induced spin–orbit coupling was investigated in the as-deposited and annealed Pt/Co/MgO stacks with perpendicular magnetic anisotropy. The above two effects were analyzed based on Hall measurements under external magnetic fields longitudinal and vertical to dc current,respectively. The coercive field as a function of dc current in vertical mode with only the Rashba effect involved decreases due to thermal annealing. Meanwhile, spin orbit torques calculated from Hall resistance with only the spin Hall effect involved in the longitudinal mode decrease in the annealed sample. The experimental results prove that the bottom Pt/Co interface rather than the Co/MgO top one plays a more critical role in both Rashba effect and spin Hall effect.
Author 赵云驰 杨光 董博闻 王守国 王超 孙阳 张静言 于广华
AuthorAffiliation State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China
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Notes 11-5639/O4
spin Hall effect Rashba effect perpendicular multilayers
The interplay of the Rashba effect and the spin Hall effect originating from current induced spin–orbit coupling was investigated in the as-deposited and annealed Pt/Co/MgO stacks with perpendicular magnetic anisotropy. The above two effects were analyzed based on Hall measurements under external magnetic fields longitudinal and vertical to dc current,respectively. The coercive field as a function of dc current in vertical mode with only the Rashba effect involved decreases due to thermal annealing. Meanwhile, spin orbit torques calculated from Hall resistance with only the spin Hall effect involved in the longitudinal mode decrease in the annealed sample. The experimental results prove that the bottom Pt/Co interface rather than the Co/MgO top one plays a more critical role in both Rashba effect and spin Hall effect.
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SubjectTerms MgO
Rashba效应
垂直磁各向异性
直流电流
相互作用
磁性多层膜
自旋轨道耦合
霍尔效应
Title Interplay of Rashba effect and spin Hall effect in perpendicular Pt/Co/MgO magnetic multilayers
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