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Interface effect of ultrathinWlayer on spin- orbit torque in Ta/W/CoFeB multilayers
Li, S. K.; Zhao, X. T.; Liu, W.; Song, Y. H.; Liu, L.; Zhao, X. G.; Zhang, Z. D.
2019-02-25
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
Volume114Issue:8
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.
Indexed BySCI
Language英语
WOS IDWOS:000460134000020
PublisherAMER INST PHYSICS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81359
Collection中国科学院金属研究所
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).
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).
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).
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