Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4182
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Title: Micromagnetic simulations of current-induced magnetization switching in Co/Cu/Co nanopillars
Authors: Xiao, ZH
Ma, XQ
Wu, PP
Zhang, JX
Chen, LQ
Shi, SQ 
Issue Date: 1-Nov-2007
Source: Journal of applied physics, 1 Nov. 2007, v. 102, no. 9, 093907, p. 1-6
Abstract: We studied the current-induced magnetic switching in Co/Cu/Co nanopillars with an in-plane magnetization traversed by a perpendicular-to-plane spin-polarized current. The Landau-Lifshitz-Gilbert equation incorporating the spin transfer torque (STT) effect was employed. Magnetization switching was found to take place when the current density exceeds a threshold. It is accompanied by drastic oscillations near the magnetic reversal point. The switching time depends on the applied current density. The magnetization can also be switched by a sufficiently long square pulsed current. The roles of anisotropy, exchange, and demagnetization energies in the magnetization switching process of nanopillars are discussed. It is shown that the switching is mainly determined by the competition between STT and the Gilbert damping torque.
Keywords: Cobalt
Copper
Current density
Demagnetisation
Exchange interactions (electron)
Ferromagnetic materials
Magnetic anisotropy
Magnetic multilayers
Magnetic switching
Magnetisation reversal
Micromagnetics
Nanostructured materials
Spin polarised transport
Publisher: American Institute of Physics
Journal: Journal of applied physics 
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.2800999
Rights: © 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Z. H. Xiao et al., J. Appl. Phys. 102, 093907 (2007) and may be found at http://link.aip.org/link/?jap/102/093907.
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