- Conference date: 2–4 January 2008
- Location: Bhubaneswar (India)
where ferroelectrics and magnetic order coexist exhibits has very high dielectric constant and therefore it is an attractive candidate for multilayer capacitors. In view of the above, we have synthesized Polycrystalline samples of Pb 0.5,0.1,0.15 by a high temperature solid‐state reaction technique at 800 °C. Preliminary structural analysis suggests that the compounds have been formed in single‐phase monoclinic crystal system. Scanning electron micrographs of the compounds show that the grains are uniformly and densely distributed over the entire surface of the sample. Detailed studies of die‐electric properties (die‐electric constant and tangent loss) as a function of frequency and temperature (30–330C) suggest that the compounds undergo ferroelectric‐paraelectric phase transition with lowering in transition temperature on increasing vanadium content. Electrical parameters (impedance and conductivity) of all the compounds were measured using complex impedance spectroscopy (CIS) technique in the above said temperature and frequency range. The complex impedance plots show that there is only bulk (grain) contribution in the compounds in the mentioned temperature range. The ac and dc conductivities were found to increase on increasing temperature suggesting NTCR behavior of the materials.
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