Effect of Electrical Properties on Gd modified BiFeO3-PbZrO3

TL;DR

This study investigates the electrical properties of Gd-modified BiFeO3-PbZrO3 composites, revealing insights into their dielectric behavior, conduction mechanisms, and impedance characteristics across various temperatures and frequencies.

Contribution

It provides new experimental data on the dielectric and electrical transport properties of Gd-modified BiFeO3-PbZrO3 composites synthesized via solid-state reaction.

Findings

Bulk resistance decreases with temperature.

Electrical conduction follows thermally activated hopping and Small Polaron tunneling.

Material exhibits lossy dielectric behavior.

Abstract

The 0.5(BiGdxFe1-xO3)-0.5(PbZrO3) composite was synthesized using a high temperature solid-state reaction technique. Preliminary X-ray structural analysis confirms the formation of the composite. The dielectric constant and loss tangent have been studied. The hysteresis loop suggest that the material is lossy. The impedance parameters were studied using an impedance analyzer in a wide range of frequency (102-106 Hz) at different temperatures for all samples. The Nyquist plot suggests the contribution of bulk effect as well as grain boundary effect and the bulk resistance deceases with rise in temperature for all samples. The electrical transport confirms the presence of hopping mechanism in the material. The dc conductivity increases with rise in temperature. The frequency variation of ac conductivity shows that the compound obeys Jonschers universal power law and confirms the Small Polaron (SP) tunneling effect due to low activation energy for all samples. Temperature dependence of dc and ac conductivity indicates that electrical conduction in the materials are thermally activated process.