On the angular and field distribution of the magnetization reversal in hard magnets

A measuring procedure for the determination of the switching behavior of hard magnetic particles is presented. For this end, the remanence vector is determined for increasing fields. In the first part of the presented analysis, the angular dependence of the switching field is calculated, neglecting the switching field distribution. In the second part, the portion of switching particles depending on the strength of the applied field and its orientation with respect to the particle easy axes is determined. This switching portion includes information on the angular dependence of the switching field and the switching field distribution for each particle orientation. The method is demonstrated on a magnetically diluted barium ferrite sample with noninteracting single-domain particles.