MONTE-CARLO SIMULATIONS OF REMANENT MAGNETIZATION DECAY DRIVEN BY INTERACTIONS

Many physical systems, including ferromagnets, exhibit slow relaxation behavior. The usual explanation of this time dependence is to assume a distribution of energy barriers, i.e., disorder. A recent model [Phy s. Rev. Lett. 67, 362 (1991)] relies on a mean field approximation of magnetostatic interactions to be the driving force responsible for the decay. Following this work, we have simulated the dynamics interactin g Ising spin system key features found in the original model. In addit ion, it is shown that the interaction driven relaxation results in a f aster decay of the magnetization; a result reflecting the model system is being driven towards its equilibrium state by the interactions.