Influence of perpendicular magnetic field and polarized current on the dynamics of coupled magnetic vortices in a thin nanocolumnar trilayer conducting structure

Abstract

A micromagnetic investigation of the dynamics of two dipole-coupled magnetic vortices in a magnetic tunnel nanocolumn under the action of an external magnetic field directed perpendicularly to the plane of the sample and of a spin-polarized electric current has been carried out. Three regimes of motion of the vortices have been shown to exist that differ in critical values of the current. The dependence of the magneticfield strength that separately switches the polarity of the cores of the vortices depending on the density of the spin-polarized current has been found. The possibility of controlling the frequency of the stationary motion of the vortices and of the fine adjustment of the amplitude of the controlling currents using an external magnetic field has been suggested.