Domain wall propagation in magnetic nanowires by spin polarized current injection

TL;DR

This paper demonstrates that electrical current injection can move domain walls in magnetic nanowires without external magnetic fields, enabling precise control of magnetic states for potential applications.

Contribution

It introduces a method for domain wall propagation driven solely by spin-polarized current, without external magnetic fields, and quantifies the effective force involved.

Findings

Domain walls can be moved by electrical current alone.

The effective force on the domain wall is 0.88x10^-9 N/A.

Propagation depends on current direction and magnitude.

Abstract

We demonstrate movement of a head-to-head domain wall through a magnetic nanowire simply by passing an electrical current through the domain wall and without any external magnetic field applied. The effect depends on the sense and magnitude of the electrical current and allows direct propagation of domain walls through complex nanowire shapes, contrary to the case of magnetic field induced propagation. The efficiency of this mechanism has been evaluated and the effective force acting on the wall has been found equal to 0.88x10-9 N.A-1.