Universal pinning energy barrier for driven domain walls in thin ferromagnetic films

TL;DR

This study demonstrates that the thermally activated creep motion of domain walls in various thin ferromagnetic films can be described by a universal energy barrier function, revealing fundamental insights into their dynamics across different materials.

Contribution

It introduces a universal energy barrier model for domain wall creep motion applicable across different magnetic materials and conditions.

Findings

Universal energy barrier function describes creep motion.

Consistent behavior across multiple magnetic materials.

Relevance to other elastic interface systems.

Abstract

We report a comparative study of magnetic field driven domain wall motion in thin films made of different magnetic materials for a wide range of field and temperature. The full thermally activated creep motion, observed below the depinning threshold, is shown to be described by a unique universal energy barrier function. Our findings should be relevant for other systems whose dynamics can be modeled by elastic interfaces moving on disordered energy landscapes.