Mechanism of Fast Axially--Symmetric Reversal of Magnetic Vortex Core
arXiv:1212.2183 · doi:10.15407/ujpe58.06.0596
Abstract
The magnetic vortex core in a nanodot can be switched by an alternating transversal magnetic field. We propose a simple collective coordinate model which describes comprehensive vortex core dynamics, including resonant behavior, weakly nonlinear regimes, and reversal dynamics. A chaotic dynamics of the vortex polarity is predicted. All analytical results were confirmed by micromagnetic simulations.
7 pages, 7 figures