Modeling of self-organized processes in the trimetric system of magnetic moments

Abstract The model of magnetization reversal dynamics in polycrystalline cubic ferrimagnets is presented allowing for grains interaction by internal stray fields, effective mass of domain walls, grain size distribution, hysteresis and saturation. The rate of change of each grain magnetization is given by nonlinear integro-differential equation. Computer program provides the self-consistent solution of the system of such equations. The evolution of angular distribution of the magnetic moments under the effect of the different series of rectangular field pulses is studied. The distributions arising as a result of self-organization during magnetic reversal differ radically from the distributions that can be induced by alone external field without magnetodipole interaction of grains.