Writing Vortex Memory Bits Using Electric Field

概要

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Magnetic inhomogeneities in dielectrics can be associated with certain electric polarization distribution since they locally reduce the symmetry of the magnetic crystal. This phenomenon known as spin flexoelectricity provides a way to electrically control micromagnetic structure. Our numerical simulations show that magnetic vortexes can be nucleated and stabilized in a magnetic nanodot by static electric field. The process of nucleation and dissipation of vortices is hysteretic. A material can be found, where both vortex and homogeneous states are stable in zero electric field, which provides a basis for an electrically controlled magnetic memory device.