Temperature dependence of switching curve for spatially oscillating field in antiferromagnetic Ising model

Abstract The switching magnetization process under influence of a magnetic field (+h,−h) applied to the two nearest-neighbors sublattices of Ising spins with antiferromagnetic coupling are studied. Monte Carlo simulations of the switching curve h(t) against temperature t is presented. The switching takes place through an uniform coherent rotation below a critical temperature t1. Above t1, nucleation of bubble domains takes place and the growth of the domains corresponds to a flat portion of the h(t) dependence till temperature t2. For t>t2 both mechanisms of local spin flips and domain wall motions are present, so monotone decrease of h(t) is observed.