Current-driven domain wall motion in magnetic wires with asymmetric notches

TL;DR

This study investigates how asymmetric notches in magnetic wires influence the current-driven motion of domain walls, revealing direction-dependent critical current densities and easier movement along less inclined slopes.

Contribution

It introduces the effect of asymmetric notches on domain wall motion and demonstrates direction-dependent critical current densities in magnetic wires.

Findings

Domain wall moves more easily along less inclined slopes.

Critical current density depends on propagation direction.

Asymmetric notches influence domain wall dynamics.

Abstract

Current-driven domain wall (DW) motion in magnetic wires with asymmetric notches was investigated by means of magnetic force microscopy. It was found that the critical current density necessary for the current-driven DW motion depended on the propagation direction of the DW. The DW moved more easily in the direction along which the slope of the asymmetric notch was less inclined.