Effect of Processing Parameters on the Improvement of Ferroelectric and Dielectric Investigations in BiFeO₃ Multiferroic Ceramics

The present research describes a standard solid state reaction method for the preparation of BiFeO₃ multiferroic ceramics. Attempt has also been made to optimize the synthesis parameters in order to achieve good kind of ferroelectric and dielectric performance of BiFeO₃ ceramics. The X-ray diffraction pattern reveals the rhombhohedral perovskite structure of ceramics. The room temperature ferroelectric measurement demonstrates a well saturated hystersis loops with improved saturation and remnant polarizations. The dielectric measurement with temperature shows a small dielectric anomaly around 350°C in BiFeO₃ samples which indicates the antiferromagnetic Neel temperature (T_N) of BiFeO₃ ceramics. Therefore, BiFeO₃ ceramic exhibits good ferroelectric and dielectric properties at room temperature.