Fe3+-substitution effect on the thermal variation of J–E characteristics and DC resistivity of quadruple perovskite CaCu3Ti4O12. (1st March 2022)

• Record Type: Journal Article
• Authors: Modi, Kunal B.; Raval, Pooja Y.; Parekh, Dolly J.; Modi, Shrey K.; Joshi, Niketa P.; Makadiya, Akshay R.; Vasoya, Nimish H.; Joshi, Utpal S.
• Is Part Of: Journal of semiconductors. Volume 43:Number 3(2022)
• Publication Date: 2022-03-01
• Subjects: perovskites -- magnetic materials -- J–E characteristics -- capacitor; Semiconductors -- Periodicals; 621.38152
• DOI: 10.1088/1674-4926/43/3/032001
• Languages: English
• ISSNs: 1674-4926

Abstract

Abstract: The electrical properties of cubic perovskite series, CaCu3– x Ti4– x Fe2 x O12 with x = 0.0, 0.1, 0.3, 0.5, and 0.7, have been studied by employing current density as a function of electric field characteristics registered at different temperatures and thermal variations of direct current electrical resistivity measurements. All of the compositions exhibit strong non-ohmic behavior. The concentration dependence of breakdown field, the temperature at which switching action takes place, and maximum value of current density ( J max ) has been explained on account of structural, microstructural, and positron lifetime parameters. The highest ever reported value of J max = 327 mA/cm 2 has been observed for pristine composition. The values of the nonlinear coefficient advise the suitability of ceramics for low-voltage varistor applications. The Arrhenius plots show typical semiconducting nature. The activation energy values indicate that electric conduction proceeds through electrons with deformation in the system.