Evaluation of Domain-Wall's behavior in Ni-Fe magnetic nanowire with constriction

Abstract

In this study, we investigate the magnetization switching process of the Ni-20at%Fe nanowire with constriction through the motion of the domain wall. The motions of the domain wall in the nanowire have been clarified by Magnetic field sweeping magnetic force microscopy (MFS-MFM). MFS-MFM is directly measure the motion of the domain structure of the sample, without a disturbance of the magnetic structure of the sample by MFM tip stray field. The magnetization switching processes ware found to be strongly dependent on the thickness and the geometry of the nanowire.