Current-induced domain wall motion in a nanowire with perpendicular magnetic anisotropy

TL;DR

This paper theoretically investigates how perpendicular magnetic anisotropy in nanowires reduces the critical current needed for magnetic domain wall motion, aiding fundamental understanding and device development.

Contribution

It explains the mechanism behind the reduction of critical current density due to anisotropy and identifies conditions for maximal reduction.

Findings

Anisotropy reduces the critical current density for domain wall motion.

Mechanism for reduction involves anisotropy energy considerations.

Maximal reduction conditions are identified.

Abstract

We study theoretically the current-induced magnetic domain wall motion in a metallic nanowire with perpendicular magnetic anisotropy. The anisotropy can reduce the critical current density of the domain wall motion. We explain the reduction mechanism and identify the maximal reduction conditions. This result facilitates both fundamental studies and device applications of the current- induced domain wall motion.