Abstract
Bismuth barium ferric titanate Bi(Ba0.25Ti0.25Fe0.5)O3 has been fabricated through a conventional solid-state reaction route. By means of various experimental techniques, the material has been characterized in different experimental conditions. Study of crystal structure using X-ray diffraction data determines the tetragonal system. The detailed studies of dielectric, impedance, conductivity of Bi(Ba0.25Ti 0.25Fe0.5)O3 in a broad range of temperature (25 – 380°C) and frequency (1kHz –1MHz) have provided a range of exciting results on structure and correlation properties, conduction mechanism, etc. The existence of ferroelectricity in the material is confirmed by the polarization-electric field loop analysis. At low-frequencies and high- temperatures, space charge polarization and the Maxwell–Wagner dielectric relaxation have been observed. The grain and grain boundary effects in the ceramic sample have been studied from the Nyquist plots. The study of temperature-frequency dependence of transport properties (conductivity) of the specimen has established type of conduction mechanism in it. The coefficient of magneto-electric coupling of the studied sample is found to be 3.79 mV cm−1Oe−1 at null magnetic field.
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