Supercurrent induced domain wall motion

TL;DR

This paper investigates how supercurrents can induce and enhance the motion of magnetic domain walls in superconductor-ferromagnet junctions, revealing regimes where supercurrents outperform traditional currents.

Contribution

It introduces a detailed analysis of domain wall dynamics driven by supercurrents in FSF junctions, highlighting regimes with increased velocity compared to FNF junctions.

Findings

Supercurrents can induce faster domain wall motion than conventional currents.

The domain wall velocity varies depending on the junction configuration and regime.

Supercurrent-driven domain wall motion can be more efficient in certain regimes.

Abstract

We study the dynamics of a magnetic domain wall, inserted in, or juxtaposed to, a conventional superconductor, via the passage of a spin polarized current through a FSF junction. Solving the Landau-Lifshitz-Gilbert equation of motion for the magnetic moments we calculate the velocity of the domain wall and compare it with the case of a FNF junction. We find that in several regimes the domain wall velocity is larger when it is driven by a supercurrent.