Structural and electrical behavior of Pb(Mg1/4Cd1/4Mo1/2)O3 ceramics Original Research Article

Preliminary X-ray structural analysis of polycrystalline Pb(Mg1/4Cd1/4Mo1/2)O3 ceramics, prepared by a solid-state reaction technique, provides single-phase orthorhombic structure at room temperature. Detailed dielectric studies of the material as a function of temperature reveal a sharp phase transition at temperature Tc=49°C obeying Curie–Weiss behavior. Scanning electron microscope (SEM) studies of the sample show the uniform distribution of grains in the samples. A dielectric anomaly and ferroelectric phase transition observed at 49°C was supported by polarization studies. The activation energy of the sample was calculated from the dielectric data. The variation of dc resistivity with temperature suggests that the compound behaves as a negative temperature coefficient resistor (NTCR).