Interface effect of ultrathinWlayer on spin- orbit torque in Ta/W/CoFeB multilayers

doi:10.1063/1.5081965

IMR OpenIR

	Interface effect of ultrathinWlayer on spin- orbit torque in Ta/W/CoFeB multilayers
	Li, S. K.1,2; Zhao, X. T.1; Liu, W.1; Song, Y. H.1,2; Liu, L.1,2; Zhao, X. G.1; Zhang, Z. D.1
通讯作者	Liu, W.(wliu@imr.ac.cn)
	2019-02-25
发表期刊	APPLIED PHYSICS LETTERS
ISSN	0003-6951
卷号	114 期号:8 页码:5
摘要	The effect of an ultrathin W interlayer on the perpendicular magnetic anisotropy (PMA), spin orbit torque (SOT), and SOT-induced magnetization switching of Ta/CoFeB/MgO films has been investigated. Both the anisotropy energy density and the spin-torque efficiency are enhanced by inserting the ultrathin W interlayer. The results suggest that the large enhancement of the spin-torque efficiency originates from the increase in the interfacial spin transparency using a simplified drift-diffusion model. The minimum in-plane field required for SOT-induced complete switching is reduced to 12 Oe for the sample with the W interlayer, which is confirmed by polar Kerr microscopy. The reversed domain nucleation and propagation of the reversal processes have been observed by Kerr imaging. It is concluded that the ultrathin W interlayer increases the spin transmission and reduces the strength of the Dzyaloshinskii-Moriya interaction. Our result suggests that the interface modification is an efficient way to modulate the PMA and SOT. Published under license by AIP Publishing.
资助者	State Key Project of Research and Development of China ; National Nature Science Foundation of China ; Chinese Academy of Sciences
DOI	10.1063/1.5081965
收录类别	SCI
语种	英语
资助项目	State Key Project of Research and Development of China[2017YFA0206302] ; National Nature Science Foundation of China[51590883] ; National Nature Science Foundation of China[51331006] ; National Nature Science Foundation of China[51771198] ; National Nature Science Foundation of China[51801212] ; Chinese Academy of Sciences[KJZD-EW-M05-3]
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000460134000020
出版者	AMER INST PHYSICS
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/132105
专题	中国科学院金属研究所
通讯作者	Liu, W.
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Li, S. K.,Zhao, X. T.,Liu, W.,et al. Interface effect of ultrathinWlayer on spin- orbit torque in Ta/W/CoFeB multilayers[J]. APPLIED PHYSICS LETTERS,2019,114(8):5.
APA	Li, S. K..,Zhao, X. T..,Liu, W..,Song, Y. H..,Liu, L..,...&Zhang, Z. D..(2019).Interface effect of ultrathinWlayer on spin- orbit torque in Ta/W/CoFeB multilayers.APPLIED PHYSICS LETTERS,114(8),5.
MLA	Li, S. K.,et al."Interface effect of ultrathinWlayer on spin- orbit torque in Ta/W/CoFeB multilayers".APPLIED PHYSICS LETTERS 114.8(2019):5.