Impact of Current on Static and Kinetic Depinning Fields of Domain Wall in Ferromagnetic Nanostrip

TL;DR

This paper investigates how current influences the static and kinetic depinning fields of domain walls in ferromagnetic nanostrips, revealing that current can reduce and tune these fields.

Contribution

It provides an analytical and numerical study of current effects on depinning fields, showing how they can be decreased and equalized, which was not previously detailed.

Findings

Depinning fields decrease with increasing current.

Static depinning field is higher than kinetic in absence of current.

Current can tune depinning fields to be equal.

Abstract

The impact of current on static and kinetic depinning fields of a domain wall in an one dimensional ferromagnetic nanostrip is investigated by solving the Landau-Lifshitz-Gilbert equation with adiabatic and non-adiabatic spin-transfer torques analytically and numerically. The results show that in the absence of current, the static depinning field is greater than the kinetic depinning field and both the depinning fields decrease by the increase of current applied in a direction opposite to the direction of the applied field. Both the depinning fields can also be tuned by the current to make them equal.