Tuning the Dzyaloshinskii-Moriya interaction in Pt/Co/MgO heterostructures through the MgO thickness

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2018专题

	Tuning the Dzyaloshinskii-Moriya interaction in Pt/Co/MgO heterostructures through the MgO thickness
	Yan, Shaohua; Zhao, Weisheng; Yang, Hongxin; Cao, Anni; Zhang, Xueying; Koopmans, Bert; Peng, Shouzhong; Zhang, Yu; Wang, Zilu
刊名	NANOSCALE
	2018
卷号	10 期号:25 页码:12062-12067
关键词	Real-space Observation Magnetic-anisotropy Skyrmion Vortices Driven Torque Creep Film
英文摘要	The interfacial Dzyaloshinskii-Moriya interaction (DMI) in ferromagnetic/heavy metal ultra-thin film structures has attracted a lot of attention thanks to its capability to stabilize Neel-type domain walls (DWs) and magnetic skyrmions for the realization of non-volatile memory and logic devices. In this study, we demonstrate that magnetic properties in perpendicularly magnetized Ta/Pt/Co/MgO/Pt heterostructures, such as magnetization and DMI, can be significantly influenced by the MgO thickness. To avoid the excessive oxidation of Co, an ultrathin Mg layer is inserted to improve the quality of the Co-MgO interface. By using field-driven domain wall expansion in the creep regime, we find that non-monotonic tendencies of the DMI field appear when changing the thickness of MgO. With the insertion of a monatomic Mg layer, the strength of the DMI could reach a high level and saturate. We conjecture that the efficient control of the DMI is a result of subtle changes of both Pt/Co and Co/MgO interfaces, which provides a method to optimize the design of ultra-thin structures achieving skyrmion electronics.
学科主题	Chemistry ; Energy & Fuels ; Materials Science ; Physics
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/17326]
专题	2018专题
推荐引用方式 GB/T 7714	Yan, Shaohua,Zhao, Weisheng,Yang, Hongxin,et al. Tuning the Dzyaloshinskii-Moriya interaction in Pt/Co/MgO heterostructures through the MgO thickness[J]. NANOSCALE,2018,10(25):12062-12067.
APA	Yan, Shaohua.,Zhao, Weisheng.,Yang, Hongxin.,Cao, Anni.,Zhang, Xueying.,...&Wang, Zilu.(2018).Tuning the Dzyaloshinskii-Moriya interaction in Pt/Co/MgO heterostructures through the MgO thickness.NANOSCALE,10(25),12062-12067.
MLA	Yan, Shaohua,et al."Tuning the Dzyaloshinskii-Moriya interaction in Pt/Co/MgO heterostructures through the MgO thickness".NANOSCALE 10.25(2018):12062-12067.