Electrical Properties of BiFeO₃ – BaTiO₃ Ceramics

S. Shankar¹ and Manish Kumar^2, *

¹ Department of Physics, ARSD college, University of Delhi, New Delhi, India.

^2,* Department of Ceramic Engineering, IIT, Banaras Hindu University, Varanasi, India.

BiFeO₃– BaTiO₃ ceramicshave been synthesized via solid state reaction method. The X-ray studies of structural parameters reveal that BiFeO₃– BaTiO₃ (BFO-BT) solid solutions undergo structural transformations from rhombhohedral to cubic system. The unit cell dimensions increases with higher doping of higher ionic radii dopant (BT). The electrical properties for different composition x=0.10,0.15 and 0.30 in (1-x)BFO-xBT ceramics were studied in the frequency range 1kHz-1MHz at room temperature. It is found that the BFO with higher BT concentrations show higher electrical resistivity as well as capacitance. The decrease in electrical resistance and capacitance has been observed with the increase of frequency of the applied field. The larger dispersion in resistivity is due to dominance of intra-well hopping over inter-well hopping indicating a strong dependence of material properties on BT doping.

Keywords: Capacitance. Resistivity. X-ray diffraction. SEM.

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