Enhanced spin-orbit torques and perpendicular magnetic anisotropy in CoFeB/MgO structures with Ta/W bilayer

doi:10.1063/1.5023192

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	Enhanced spin-orbit torques and perpendicular magnetic anisotropy in CoFeB/MgO structures with Ta/W bilayer
	Li, SK ; Zhao, XT ; Liu, W ; Wang, TT ; Zhao, XG ; Zhang, ZD
刊名	AIP ADVANCES
	2018-06-01
卷号	8 期号:6 页码:-
ISSN号	2158-3226
DOI	10.1063/1.5023192
英文摘要	Spin-orbit torques (SOTs) and the perpendicular magnetic anisotropy (PMA) in Ta/W/CoFeB/MgO structures have been investigated by varying the thickness of the W layer. Addition of the W layer gives rise to enhancement of the annealing stability and perpendicular anisotropy field. After annealing at high temperature, a high-resistivity is obtained for samples with W layer (up to 2 nm thickness), which indicates the existence of beta-W phase. A giant spin Hall angle of 0.50 is found in Ta/W/CoFeB/MgO structures with a 2 nm W layer by using the harmonic Hall voltage measurement. The lowest switching current density of 6 MA/cm(2) is achieved in the sample with 1 nm W layer, indicating that a strong interfacial spin Hall effect may exist in the CoFeB/W interface. The study may provide a way to obtain simultaneously a large PMA as well as a high efficiency of SOTs. (C) 2018 Author(s).
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
语种	英语
WOS记录号	WOS:000436855300007
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80165]
专题	金属研究所_中国科学院金属研究所
作者单位	1.[Li, S. K. 2.Zhao, X. T. 3.Liu, W. 4.Wang, T. T. 5.Zhao, X. G. 6.Zhang, Z. D.] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 7.[Li, S. K. 8.Wang, T. T.] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Li, SK,Zhao, XT,Liu, W,et al. Enhanced spin-orbit torques and perpendicular magnetic anisotropy in CoFeB/MgO structures with Ta/W bilayer[J]. AIP ADVANCES,2018,8(6):-.
APA	Li, SK,Zhao, XT,Liu, W,Wang, TT,Zhao, XG,&Zhang, ZD.(2018).Enhanced spin-orbit torques and perpendicular magnetic anisotropy in CoFeB/MgO structures with Ta/W bilayer.AIP ADVANCES,8(6),-.
MLA	Li, SK,et al."Enhanced spin-orbit torques and perpendicular magnetic anisotropy in CoFeB/MgO structures with Ta/W bilayer".AIP ADVANCES 8.6(2018):-.