Nucleation and Motion of Domain Walls in Glass-Coated Co-Based Amorphous Microwires

摘要

A method for the observation of domain wall motion in glass-coated Co-based amorphous microwires is proposed. Using this method, the magnetization reversal of the microwire induced by current pulses of high amplitude is studied. It is shown that the magnetization reversal occurs due to the nucleation of the domain walls at the sample ends and their subsequent motion along the microwire. The dependencies of the domain wall velocity on the current pulse amplitude and an external longitudinal de magnetic field are measured. A simple model describing the main features of the experimental data is presented.