Screw-pitch effect and velocity oscillation of a domain wall in a ferromagnetic nanowire driven by spin-polarized current

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	Screw-pitch effect and velocity oscillation of a domain wall in a ferromagnetic nanowire driven by spin-polarized current
	Li, ZD ; Li, QY ; Wang, XR ; liu, WM ; Liang, JQ ; Fu, GS
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2010
卷号	22 期号:21
关键词	MAGNETIC MULTILAYER ELECTRIC-CURRENT WAVE EXCITATIONS TRANSFER TORQUES DYNAMICS MOTION REVERSAL DEVICES FILMS
ISSN号	0953-8984
通讯作者	Li, ZD (reprint author), Hebei Univ Technol, Dept Appl Phys, Tianjin 300401, Peoples R China.
中文摘要	We investigate the dynamics of a domain wall in a ferromagnetic nanowire with spin-transfer torque. The critical current condition is obtained analytically. Below the critical current, we get the static domain wall solution, which shows that the spin-polarized current cannot drive a domain wall moving continuously. In this case, the spin-transfer torque plays both the anti-precession and anti-damping roles, which counteracts not only the spin precession driven by the effective field but also Gilbert damping of the moment. Above the critical value, the dynamics of the domain wall exhibits the novel screw-pitch effect characterized by the temporal oscillation of domain wall velocity and width, respectively. Both the theoretical analysis and numerical simulation demonstrate that this novel phenomenon arises from the conjunctive action of Gilbert damping and spin-transfer torque. We also find that the roles of spin-transfer torque are completely opposite for the cases below and above the critical current.
收录类别	SCI
资助信息	Hundred Innovation Talents Supporting Project of Hebei Province of China; NSF of China [10874038, 10775091, 90406017, 60525417]; NKBRSFC [2006CB921400]; RGC/CERG [603007]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52352]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Li, ZD,Li, QY,Wang, XR,et al. Screw-pitch effect and velocity oscillation of a domain wall in a ferromagnetic nanowire driven by spin-polarized current[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2010,22(21).
APA	Li, ZD,Li, QY,Wang, XR,liu, WM,Liang, JQ,&Fu, GS.(2010).Screw-pitch effect and velocity oscillation of a domain wall in a ferromagnetic nanowire driven by spin-polarized current.JOURNAL OF PHYSICS-CONDENSED MATTER,22(21).
MLA	Li, ZD,et al."Screw-pitch effect and velocity oscillation of a domain wall in a ferromagnetic nanowire driven by spin-polarized current".JOURNAL OF PHYSICS-CONDENSED MATTER 22.21(2010).