Universal Pinning Energy Barrier for Driven Domain Walls in Thin Ferromagnetic Films

V. JEUDY,, A. MOUGIN, W. SAVERO TORRES, J. GORCHON, A. LEMAÎTRE, AND J.-P. JAMET; S. BUSTINGORRY, A. B. KOLTON

PHYSICAL REVIEW LETTERS

AMER PHYSICAL SOC

Lugar: New York; Año: 2016 vol. 117

0031-9007

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