Mössbauer Investigations of the 0.5BaTiO3–0.5(Ni,Zn)Fe2O4 Composites

A detailed Mossbauer study was performed in the ceramic composite 0.5BaTiO3– 0.5Ni0.5Zn0.5Fe2O4 in order to detect an indirect magnetoelectric coupling via possible Mossbauer spectra anomalies around the barium titanate phase transitions. Dielectric spectra show the existence of three phase transitions in this composite near the crystal BaTiO3 phase transitions temperatures. A few irregularities in the temperature dependence of the centre shift of Mossbauer spectra were observed near the phase transitions of BaTiO3 which are explained mainly by the contribution of iron atoms incorporated into BaTiO3 or located at the ceramic grain boundaries.