Creep motion of a domain wall in the two-dimensional random-field Ising   model with a driving field
  With Monte Carlo simulations, we study the creep motion of a domain wall in the two-dimensional random-field Ising model with a driving field. We observe the nonlinear fieldvelocity relation, and determine the creep exponent {\mu}. To further investigate the universality class of the creep motion, we also measure the roughness exponent {\zeta} and energy barrier exponent {\psi} from the zero-field relaxation process. We find that all the exponents depend on the strength of disorder. 
R. H. Dong, B. Zheng and N. J. Zhou
cond-mat.dis-nn cond-mat.soft