Studies on Structural and Electrical Characteristics of (Co / Ti ) Modified Bismuth Ferrite

Abstract

The polycrystalline sample of Bi(Co0.35Ti0.35Fe0.30)O3 ceramic has been synthesized using high temperature solid-state reaction technique. A preliminary X-ray diffraction analysis (at room temperature) suggests that the compound possesses orthorhombic structure. Average particles size is calculated to be about 29 nm. Surface morphologies of the sintered samples were recorded by a scanning electron microscope (SEM). It reveals the uniform distribution of grains on the surfaces of the sample. The dielectric
analysis for dielectric parameters, dielectric constant and tangent loss, has been analyzed at various temperature (RT – 773 K) and frequency (1 kHz – 1 MHz) ranges. However, no phase transition is observed for Bi(Co0.35Ti0.35Fe0.30)O3 ceramic in the above experimental temperature range. Analysis of the frequency dependence of the real and imaginary impedance shows the existence of non-Debye type of relaxation in the material.