Effects of magnetic interactions on the distribution of energy barriers inthe time dependence of magnetization of a magnetic thin film

Influence of the magnetic interactions on distribution of energy barrier an d time dependent phenomena of magnetization are investigated by micromagnet ic and Monte Carlo simulation. For the magnetic thin film with randomly dis tributed easy axes in the film plane, the shape of the density function of the energy barrier is significantly changed with the varying magnetic inter actions. If the exchange or magnetostatic interaction is strong, the densit y function of energy barrier has a broad distribution, then magnetization d ecay with time shows a linear dependence on ln( t). (C) 1999 American Insti tute of Physics. [S0021-8979(99)62408-2].