Dielectric and ferroelectric properties of multicomponent equiatomic calcium lead strontium titanate (Ca0.33Pb0.33Sr0.33)TiO3

Abstract

Perovskite oxides are well-known for their dielectric and ferroelectric properties. In this work, the dielectric properties of calcium lead strontium titanate synthesized by reverse co-precipitation process with two different solvent concentrations were studied. Formation of single phase was confirmed by X-ray diffraction and tetragonality present in the lattice was analysed through Rietveld refinement. The grain size, morphology and composition were studied using scanning electron microscope and energy dispersive spectroscopy. The influence of frequency in the range of 1 ​Hz–107 ​Hz and temperature range -100 ​°C to 300 ​°C on dielectric response were studied. Curie-Weiss fits showed both the systems to be relaxor ferroelectrics. The dielectric relaxation mechanism and activation energy were determined from the electric modulus. The relaxation time and the dissipation factors were obtained from Cole-Cole analysis. The ferroelectric properties were assessed using a polarization-electric field loop tracer and efficiencies of memory storage were analysed.

Keywords

• Multicomponent oxide
• Dielectric properties
• Perovskite
• Cole-cole analysis
• Ferroelectric
• P-E loop