中国物理B ›› 2016, Vol. 25 ›› Issue (7): 77501-077501.doi: 10.1088/1674-1056/25/7/077501
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Yun-Chi Zhao(赵云驰), Guang Yang(杨光), Bo-Wen Dong(董博闻), Shou-Guo Wang(王守国), Chao Wang(王超), Young Sun(孙阳), Jing-Yan Zhang(张静言), Guang-Hua Yu(于广华)
Yun-Chi Zhao(赵云驰)1, Guang Yang(杨光)1,2, Bo-Wen Dong(董博闻)1,2, Shou-Guo Wang(王守国)1,2, Chao Wang(王超)1, Young Sun(孙阳)1, Jing-Yan Zhang(张静言)2, Guang-Hua Yu(于广华)2
摘要:
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.
中图分类号: (Dynamic properties?)