LAUSR

Abstract Fe@Composite-Ferrite soft magnetic composites (SMCs) were successfully fabricated by ions doping on the surface of Fe@Fe3O4 powders which can improve the thermal stability and insulation. Compared with the traditional SMCs which were constructed by soft magnetic particle and non-magnetic boundary, this new material maintains high Bm of 1.3214 T at 5000 A/m, 50 Hz, high μmax of 625.14 and low Pcm of 10.02 W/kg at 50 Hz, 1.3 T. A three-dimensional simulation loss model and correlation theory of magnetic domain walls were used to analyze the relative loss mechanism and the effect of the new ferrite coating on the domain walls during magnetization. The novel composite-ferrite boundary greatly reduces the pinning, promoting domain wall motion and increasing the number of active magnetic objects.