Spin-transfer torque induced reversal in magnetic domains
arXiv:0809.2910 · doi:10.1016/j.chaos.2008.10.018
Abstract
Using the complex stereographic variable representation for the macrospin, from a study of the nonlinear dynamics underlying the generalized Landau-Lifshitz(LL) equation with Gilbert damping, we show that the spin-transfer torque is effectively equivalent to an applied magnetic field. We study the macrospin switching on a Stoner particle due to spin-transfer torque on application of a spin polarized current. We find that the switching due to spin-transfer torque is a more effective alternative to switching by an applied external field in the presence of damping. We demonstrate numerically that a spin-polarized current in the form of a short pulse can be effectively employed to achieve the desired macro-spin switching.
16 pages, 6 figures
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- Bifurcation and chaos in spin-valve pillars in a periodic applied magnetic field
- Phase locking of spin transfer nano-oscillators using common microwave sources
- Spin-Transfer-Torque Driven Magneto-Logic Gates Using Nano Spin-Valve Pillars
- Domain wall dynamics in the spinor Bose-Einstein condensates