| 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 Author | Liu, W.(wliu@imr.ac.cn) |
| 2019-02-25 | |
| Source Publication | APPLIED PHYSICS LETTERS
 |
| ISSN | 0003-6951 |
| Volume | 114Issue:8Pages:5 |
| Abstract | 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. |
| Funding Organization | State Key Project of Research and Development of China ; National Nature Science Foundation of China ; Chinese Academy of Sciences |
| DOI | 10.1063/1.5081965 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Physics |
| WOS Subject | Physics, Applied |
| WOS ID | WOS:000460134000020 |
| Publisher | AMER INST PHYSICS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/132101 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, W. |
| Affiliation | 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 |
| 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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