Effect of Surface Modification of Compacted Iron Powder Particles on Magnetization Processes According to the Landgraf Method of Hysteresis Loss Separation

Abstract

The aim of this work was to investigate the effect of surface modification of iron powder particles of two different size fractions in soft magnetic compacted powder on the results of direct current loss separation according to the Landgraf method. We found that the surface treatment of smaller iron powder particles leads to an increased contribution of domain wall displacements to the overall magnetization process, while the surface modification of larger iron powder particles results in an increased contribution of the rotation of the spontaneous magnetization vector to the magnetization process of the compacted soft magnetic powder.