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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
Corresponding AuthorLiu, W.(wliu@imr.ac.cn)
2019-02-25
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
Volume114Issue:8Pages:5
AbstractThe 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.
Funding OrganizationState Key Project of Research and Development of China ; National Nature Science Foundation of China ; Chinese Academy of Sciences
DOI10.1063/1.5081965
Indexed BySCI
Language英语
Funding ProjectState 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 Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000460134000020
PublisherAMER INST PHYSICS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/132105
Collection中国科学院金属研究所
Corresponding AuthorLiu, W.
Affiliation1.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
Recommended Citation
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.
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