Dynamic effect of overhangs and islands at the depinning transition in two-dimensional magnets

Abstract

With the Monte Carlo methods, we systematically investigate the short-time dynamics of domain-wall motion in the two-dimensional random-field Ising model with a driving field ?DRFIM?. We accurately determine the depinning transition field and critical exponents. Through two different definitions of the domain interface, we examine the dynamics of overhangs and islands. At the depinning transition, the dynamic effect of overhangs and islands reaches maximum. We argue that this should be an important mechanism leading the DRFIM model to a different universality class from the Edwards-Wilkinson equation with quenched disorder

9 pages, 6 figures

References in corpus (13)

• Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
• Width distribution of contact lines on a disordered substrate
• Dynamics below the depinning threshold
• Creep motion of an elastic string in a random potential
• Thermal rounding of the depinning transition
• Non-equilibrium relaxation of an elastic string in a random potential
• Short time relaxation of a driven elastic string in a random medium
• Field-Driven Domain-Wall Dynamics in GaMnAs Films with Perpendicular Anisotropy
• Short-time domain-wall dynamics in the random-field Ising model with a driving field
• Universal non stationary dynamics at the depinning transition
• Loss separation for dynamic hysteresis in magnetic thin films
• Nonequilibrium critical dynamics with domain wall and surface
• Short-time critical dynamics at perfect and non-perfect surface

Cited by in corpus (6)

• Recent advances and open challenges in percolation
• Universality class of the depinning transition in the two-dimensional Ising model with quenched disorder
• Relaxation-to-creep transition of domain-wall motion in two- dimensional random-field Ising model with ac driving field
• Depinning phase transition in two-dimensional clock model with quenched randomness
• Intrinsic anomalous scaling in a ferromagnetic thin film model
• Nonsteady dynamics at the dynamic depinning transition in the two-dimensional Gaussian random-field Ising model