Abstract
Polycrystalline Bi1-xBaxFeO3(x=0.0, 0.1, 0.2and0.3) were prepared by citric acid sol-gel auto-ignition method to study the structural and dielectric propertied in multiferroics. Raman studies revealed that all 13 Raman modes predicted for rhombohedral structure (3Rc) of BFO, have been observed in work. To distinguish A1 and E modes, Raman measurements were carried out in both the parallel and crossed polarization configuration. In addition to E modes, intense peaks corresponding to A1-1, A1-2 and A1-3 modes at 128.8,166 and 211 cm-1 respectively observed in the polycrystalline BFO. The results of Raman studies match with reported literature. As Ba doping concentration was increased the structure of BFO changed from rhombohedral to tetragonal. In dielectric studies, dielectric constant (both ε’ and ε”) and dielectric loss decreases with increases in frequency (100Hz to 1MHz) at room temperature. Dielectric constant and loss dispersion increases with increases in temperature. Leakage current density increases with Ba doping.
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