Conduction Mechanisms and Permittivity: Conductivity Correlation in the Gd-Based Perovskite Structure

Abstract

This chapter investigates the dielectric properties of GdCa2Cu3Oδ, a recently discovered material showcasing colossal permittivity. Through a detailed examination, we explore the original mechanisms behind its remarkable dielectric behavior, crystal structure, and microstructure properties. The temperature-dependent dielectric measurements revealed a constant permittivity value at room temperature (104), indicative of colossal permittivity behavior. We discuss the origin of this phenomenon in terms of intrinsic and extrinsic mechanisms, including defect-related effects, charge carrier hopping, and Maxwell-Wagner polarization. By highlighting the latest research advancements, this chapter aims to provide readers with a thorough understanding of the possibilities presented by this innovative material in the ever-evolving field of functional materials and their applications. Moreover, it explores the diverse range of applications enabled by GdCa2Cu3Oδ, from high-capacitance devices to energy storage systems. Our findings provide valuable insights into the understanding and utilization of colossal permittivity in GdCa2Cu3Oδ perovskite for advanced electronic applications (capacitors Y5R and Y6R).