Nonadiabatic spin-torque and damping effects on vortex core switching triggered by a single current pulse

doi:10.1088/1674-1056/19/3/037001

Abstract Switching the orientation of a vortex core by spin-polarised pulse current introduces a promising concept for the reliable addressing of a single nanodisc element inside dense arrays. In this paper, micromagnetic simulations are employed to study the vortex core switching behaviour excited by a short in-plane Gaussian current pulse. We find that both the switching mechanism and the switching time are not sensitive to changes in the phenomenological parameters of spin-torque nonadiabaticity and Gilbert damping. The switching time, however, strongly depends on the current strength. In addition, we have theoretically predicted the parameter range of current pulses to achieve a single switching event.

Keywords: magnetic vortex spin torque micromagnetic simulation

Received: 20 August 2009
Revised: 11 September 2009
Accepted manuscript online:

PACS:	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)
	75.75.+a
	75.50.Bb	(Fe and its alloys)
	75.10.-b	(General theory and models of magnetic ordering)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.~50871075 and 10974142) and the Natural Science Foundation of Shanghai, China (Grant No.~08ZR1420500).

Cite this article:

Jin Wei(金伟) and Liu Yao-Wen(刘要稳) Nonadiabatic spin-torque and damping effects on vortex core switching triggered by a single current pulse 2010 Chin. Phys. B 19 037001

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Nonadiabatic spin-torque and damping effects on vortex core switching triggered by a single current pulse

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