Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields

Details Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields

2010-02-15

arxiv.org/abs/1002.2841v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures, to be appear on APL

Scientific paper

We have employed complete micromagnetic simulations to analyze dc current driven self-oscillations of a vortex core in a spin-valve nanopillar in a perpendicular field by including the coupled effect of the spin-torque and the magnetostatic field computed self-consistently for the entire spin-valve. The vortex in the thicker nanomagnet moves along a quasi-elliptical trajectory that expands with applied current, resulting in blue-shifting of the frequency, while the magnetization of the thinner nanomagnet is non-uniform due to the bias current. The simulations explain the experimental magnetoresistance-field hysteresis loop and yield good agreement with the measured frequency vs. current behavior of this spin-torque vortex oscillator.

Affiliated with

Also associated with

No associations

Rating

Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-145919