Spin-Torque-Induced Rotational Dynamics of a Magnetic Vortex Dipole

Details Spin-Torque-Induced Rotational Dynamics of a Magnetic Vortex Dipole Spin-Torque-Induced Rotational Dynamics of a Magnetic Vortex Dipole

2008-07-29

arxiv.org/abs/0807.4660v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

19 pages, 4 figures,

Scientific paper

10.1103/PhysRevB.78.174408

We study, both experimentally and by numerical modeling, the magnetic dynamics that can be excited in a magnetic thin-film nanopillar device using the spin torque from a spatially localized current injected via a 10s-of-nm-diameter aperture. The current-driven magnetic dynamics can produce large amplitude microwave emission at zero magnetic field, with a frequency well below that of the uniform ferromagnetic resonance mode. Micromagnetic simulations indicate that the physical origin of this efficient microwave nano-oscillator is the nucleation and subsequent steady-state rotational dynamics of a magnetic vortex dipole driven by the localized spin torque. These results show this novel implementation of a spintronic nano-oscillator is a promising candidate for microwave technology applications.

Affiliated with

Also associated with

No associations

Rating

Spin-Torque-Induced Rotational Dynamics of a Magnetic Vortex Dipole 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-Induced Rotational Dynamics of a Magnetic Vortex Dipole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin-Torque-Induced Rotational Dynamics of a Magnetic Vortex Dipole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-38815