Studies of structural, dielectric, and electrical characteristics of 0.5(BiMn1/2Ti1/2O3)–0.5PbTiO3 electronic system

Abstract

Detailed studies of structural, dielectric, and electrical characteristics of a precursor solution method synthesized, bismuth and lead titanate modified manganese titanate (MnTiO3) are reported in this communication. Analysis of X-ray diffraction data shows that MnTiO3 goes through a structural change on the addition of Bi and PbTiO3 (PT). At room temperature, MnTiO3 has a rhombohedral crystal system, which changes to an orthorhombic crystal system with the addition of bismuth in it (i.e., BiMn1/2Ti1/2O3 = BMT). On further addition of PT in BMT (i.e., 0.5 BiMn1/2Ti1/2O3–0.5PbTiO3), a stable perovskite structure with tetragonal symmetry was obtained. It is found that the addition of bismuth and lead titanate effectively reduces the grain size, and hence enhances the relative permittivity of the compound. It is further found that ferroelectricity can be induced in a non-ferroelectric MnTiO3 on the addition of Bi and PbTiO3 in it. However, the addition of bismuth and lead titanate increases the leakage current density of the compound.