ASYMMETRY OF PARTICULAR MAGNETIZATION CYCLES IN THE WEAK-FIELD REGION

The problem of the occurrence of asymmetry in particular cycles is con sidered by analyzing the magnetization of a model of a polycrystalline ferromagnetic material, representing three two-domain particles (the domains in which are separated by a plane 180 degrees domain boundary) , in which there are some defects in the structure. It is shown that t he reason for this asymmetry may be nonlinear dependence of a magnetiz ation on the external magnetic field for inverse displacements of the domain boundaries, which enables the experimental results of measureme nts of the dependence of the amplitude and phase of the second harmoni c component of the periodic magnetic-induction signal on the magnetizi ng field, when the ferromagnetic material is magnetized by a weak harm onic excitation field, to be explained.