Universal pinning energy barrier for driven domain walls in thin ferromagnetic films
arXiv:1603.01674 · doi:10.1103/PhysRevLett.117.057201
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.
10 pages, 3 figures