Structural Influence on Conductivity and Dielectric Properties of Ferroelectric Crystals

Abstract

The study examines the structural effect on electrical conductivity and dielectric properties of perovskite-based architecture of ferroelectric crystals. Ferroelectric materials are non-Centro symmetrically crystallized substances that are spontaneously polarized, as such, the functionality of these materials is very sensitive to lattice symmetry, microstructure and defect chemistry. The ferroelectric crystals in this paper have been prepared by controlled solid-state methods, and they were systematically studied by X-ray diffraction and scanning electron microscopy in order to determine phase purity, lattice distortions, grain morphology, and microstrain. Complex impedance spectroscopy and dielectric spectroscopy of large temperature and frequency ranges were studied to examine the electrical conductivity and dielectric behavior.

The structure analysis was used to establish the existence of stable ferroelectric phases of varying tetragonality and microstructural homogeneity. Electrical studies showed that a conglomeration of thermally activated DC transport of conductivity and frequency-dependent AC conduction processes such as hopping and space-charge processes controlled conductivity.

The findings provide a clear structure property correlation between crystallographic symmetry, microstructural aspects, and defect landscapes with electrical and dielectric performance in ferroelectric crystals. Such combined knowledge can be useful in the rational design and optimization of ferroelectric materials to be used in capacitors, sensors, actuators, and energy-storage devices, where controlled structural engineering is the key to reliable and high-performance functional behavior. The results are also applicable in the future to incorporate lead-free ferroelectric technologies at the global level.