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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; Zhao, Xiaotian; Liu, Wei; Song, Yuhang; Zhao, Xinguo; Zhang, Zhidong
2020-06-21
Source PublicationNANOSCALE
Volume12Issue:23Pages:12444-12453
AbstractOwing 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.
DOI10.1039/d0nr02168g
WOS IDWOS:000544063600021
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82755
Collection中国科学院金属研究所
Recommended Citation
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.
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