Current manipulation of a vortex confined in a micron-sized Fe19Ni81 disk

Abstract

By measuring a rectifying planer Hall effect, we have manipulated a vortex core trapped in a single layered Fe19Ni81 disk dependent upon the magnitude of a dc current simultaneously applied with an rf current and a magnetic field. The observed behavior is attributed to a single vortex translational mode. The resonance frequency of the translational mode is found to be almost proportional to the magnitude of the dc current and to be governed by the shape of the energy potential well defined by the disk shape.