Influence of rare earth metal Ho on the interfacial Dzyaloshinskii-Moriya interaction and spin torque efficiency in Pt/Co/Ho multilayers

doi:10.1039/d0nr02168g

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	Influence of rare earth metal Ho on the interfacial Dzyaloshinskii-Moriya interaction and spin torque efficiency in Pt/Co/Ho multilayers
	Liu, Long 1,2; Zhao, Xiaotian 1; Liu, Wei 1; Song, Yuhang 1,2; Zhao, Xinguo 1; Zhang, Zhidong 1
刊名	NANOSCALE
	2020-06-21
卷号	12 期号:23 页码:12444-12453
ISSN号	2040-3364
DOI	10.1039/d0nr02168g
通讯作者	Liu, Wei(wliu@imr.ac.cn)
英文摘要	Owing to the large spin-orbit coupling and tunable magnetization, heavy rare-earth metals Gd and Tb have great effects on the enhancement of spin-orbit torque (SOT) and fast domain wall (DW) motion. However, the reports on the heavy rare-earth metal Ho with more 4f electrons in the research of spintronics are limited. In this work, we found that the interfacial Dzyaloshinskii-Moriya interaction (DMI) and SOT in Pt/Co/Ho multilayers can be strongly influenced by changing the thickness of the Ho (t(Ho)) layer. Att(Ho)= 2.4 nm, DMI exchange constant \|D\| and spin torque efficiency xi(DL)reach maximum values of 1.24 mJ m(-2)and 0.137 respectively, which are comparable with those in other Pt/Co/nonmagnetic (NM) layer structures. Deterministic current-induced magnetization switching with a low critical current density of 10(6)A cm(-2)can be realized whent(Ho)is less than 5 nm. The Neel-type DW with left-handed chirality and positive signDcan be determined by observing the current-induced asymmetric DW motion. Our results are helpful to prompt the application of heavy rare-earth elements in the fields of the DMI, SOT and chiral DW dynamics.
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[51971219] ; National Nature Science Foundation of China[51801212]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000544063600021
资助机构	State Key Project of Research and Development of China ; National Nature Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139681]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Wei
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu, Long,Zhao, Xiaotian,Liu, Wei,et al. Influence of rare earth metal Ho on the interfacial Dzyaloshinskii-Moriya interaction and spin torque efficiency in Pt/Co/Ho multilayers[J]. NANOSCALE,2020,12(23):12444-12453.
APA	Liu, Long,Zhao, Xiaotian,Liu, Wei,Song, Yuhang,Zhao, Xinguo,&Zhang, Zhidong.(2020).Influence of rare earth metal Ho on the interfacial Dzyaloshinskii-Moriya interaction and spin torque efficiency in Pt/Co/Ho multilayers.NANOSCALE,12(23),12444-12453.
MLA	Liu, Long,et al."Influence of rare earth metal Ho on the interfacial Dzyaloshinskii-Moriya interaction and spin torque efficiency in Pt/Co/Ho multilayers".NANOSCALE 12.23(2020):12444-12453.