Form of the hysteresis loop in a model of the remagnetization of ferromagnets by statistically nonsimultaneous irreversible displacements of boundaries between domains

The form (width, inclination) of the hysteresis loop of ferromagnets is cal culated with the use of the assumption that the distribution of the critica l fields obeys a normal law and that the lag in the displacement of the dom ain boundaries is due to fluctuations in the number of defects. The calcula ted loops and actual loops are compared for a copper-bearing iron alloy sub jected to preliminary quenching and subsequent aging at 730 degrees C for t he different amounts of time, when particles of different sizes are precipi tated from the solid solution.