Complex Impedance Spectroscopy studies to unravel electrical properties and processes in Al+3-modified PLZT

• Published in: Journal of materials science. Materials in electronics 2022-12, Vol.33 (36), p.26943-26953
• Main Authors: Jalaja, M. A., Dutta, Soma
• Format: Article
• Language: English
• Subjects: Bulk modulus; Characterization and Evaluation of Materials; Chemistry and Materials Science; Electric properties; Electrical conduction; Electrical properties; Electrical resistivity; Grain boundaries; Grain growth; Grain size; High temperature; Impedance spectroscopy; Materials Science; Optical and Electronic Materials; Spectroscopic analysis; Spectrum analysis; Temperature
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-09358-4

The complex impedance spectroscopy studies on Al +3 -modified PLZT (PLAZT) were carried out to understand the electrical properties and conduction phenomena in the system. The role of temperature on the grain and grain boundary resistances was interpreted and consequent relaxation times were evaluated to verify the investigation of complex impedance spectra. AC field-dependent dielectric response and conductivity of PLAZT were studied for a wide range of frequencies at different temperatures. Microstructure-dependent electrical conduction in the material at high temperatures (400–500 °C) was verified from frequency-dependent electrical data using conductivity and modulus formalism. The values of bulk, grain boundary conductivities, and activation energies of PLAZT were considered for interpreting the impedance data. A thermally activated electric conduction of ions and electrons was revealed in PLAZT for temperatures above 400 °C, which was evident from the frequency-dependent double relaxation process at these temperatures.