The static and hyper-frequency magnetic properties of a ferromagnetic–ferroelectric composite

This paper reports the static and hyper-frequency magnetic properties, as well as their relationship with microstructure, of the ferromagnetic–ferroelectric co-fired composite ceramic, (1−x)Ba2Zn1.2Cu0.8Fe12O22–xPb(Ni1/3Nb2/3)0.8Ti0.2O3. The X-ray diffraction results did not detect any other phase in the co-fired ceramics, but found a crystal structural distortion of ferrite phase. Scanning electron microscopy photos showed that two phases’ grains matched well and stacked compactly and the hexagonal ferrite changed its grain morphology. The saturation magnetization increased with the reduction of magnetic phase in the range of 0<x<0.65 because of the stress-induced structural distortion. The permeability decreases monotonically with the reduction of magnetic phase in the whole composition range.