The Microstructure and Magnetoelectric Properties of Multiferroic Composites

Multiferroic composites are very promising materials because of their applicability because the magnetoelectric effect occurs in them. The subject of the study were two multiferroic ceramic composites: leaded obtained from powder of the composition PbFe_0.5 Nb_0.5 O₃ and ferrite powder of the composition Ni_0.64 Zn_0.36 Fe₂ O₄ and unleaded which was obtained from the powder of the composition BaFe_0.5 Nb_0.52 O₃ and the same ferrite powder Ni_0.64 Zn_0.36 Fe₂ O₄. For the both multiferroic materials the following studies were conducted: SEM, BSE, EDS, XRD and the temperature dependence of dielectric constant ε(T). Using the previously developed method of calculating the magnetoelectric coupling factor (g), based on dielectric measurements, the magnitude of the magnetoelectric effect in the multiferroic composites was determined.