Spin-Orbit Torque Driven Chiral Domain Wall Motion in Mn<sub>3</sub>Sn

doi:arXiv:2409.18554

	Spin-Orbit Torque Driven Chiral Domain Wall Motion in Mn₃Sn
	Xu, Zhengde1,2,3 ; Zhou, Yue 3,4; Zhang, Xue1,2,3 ; Qiao, Yixiao1 ; Xu, Zhuo1 ; Shao, Dingfu 5; Zhu, Zhifeng1,6
	2024-09-27
状态	已发表
摘要	Noncollinear chiral antiferromagnets, such as Mn3X (X = Sn, Ge), have garnered significant interest in spintronics due to their topologically protected Weyl nodes and large momentum-space Berry curvatures. In this study, we report rapid chirality domain-wall (CDW) motion in Mn3Sn, driven by spin-orbit torque at over 545.3 mÂ·s^{â 1} under a remarkably low current density of 9Ã 10¹⁰ AÂ·m^{â 2} . The results demonstrate that the chirality of the domain wall and the direction of the current collectively determine the displacement direction of the CDW. Theoretically, we provide an analysis of the effective field experienced by the octupole moment, uncovering the underlyingÂ motion mechanism based on the unique profile of the chiral spin structure. Notably, CDWs with opposite chirality can form within the same Dzyaloshinskii–Moriya interaction sample, and the NÃ©el-like CDW type is dictated by the orientation of the kagome plane rather than the negligible magnetostatic energy associated with the small magnetization (approximately 3.975Ã 10^{â 3} ). Additionally, the CDW, with a considerable width of 770 nm, is segmented into three 60Â° portions due to the six-fold anisotropy in Mn₃Sn. These emphasize that CDW motion in Mn3Sn cannot be quantitatively studied using ferromagnetic frameworks. We also demonstrate that a small external field can effectively regulate CDW velocity. Our comprehensive results and theoretical analysis provide crucial guidelines for integrating antiferromagnet CDWs into functional spintronic devices.
关键词	Noncollinear Antiferromagnet Chiral Domain-Wall Spin-Orbit Torque
语种	英语
DOI	arXiv:2409.18554
相关网址	查看原文
出处	Arxiv
收录类别	PPRN.PPRN
WOS记录号	PPRN:100702236
WOS类目	Physics, Condensed Matter
文献类型	预印本
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/433534
专题	信息科学与技术学院信息科学与技术学院_硕士生信息科学与技术学院_博士生信息科学与技术学院_PI研究组_祝智峰组
通讯作者	Shao, Dingfu; Zhu, Zhifeng
作者单位	1.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 5.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China 6.Shanghai Engn Res Ctr Energy Efficient & Custom AI IC, Shanghai 201210, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhengde,Zhou, Yue,Zhang, Xue,et al. Spin-Orbit Torque Driven Chiral Domain Wall Motion in Mn₃Sn. 2024.