1. Impedance spectroscopic studies on six-layered Bi7Ti4NbO21 Aurivillius intergrowth ferroelectric ceramic.
- Author
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Jhansi, G. and Prasad, N. V.
- Subjects
- *
FERROELECTRIC ceramics , *CHARGE carriers , *LATTICE constants , *DIELECTRICS , *TEMPERATURE - Abstract
We focus on the conductivity analysis of Aurivillius family of six-layered intergrowth compound, namely Bi7Ti4NbO21. The compound was prepared by solid state intergrowth route. The product compound belongs to orthorhombic structure and the lattice parameters were found to be: (a = 5.442 A0, b = 5.404 A0, c = 57.990 A0). The frequency dependent impedance measurements were made on the sample over a frequency range of 100 - 1MHz, right from room temperature to 500°C. A detailed study on ac-conductivity and complex impedance analysis was carried out on the said above intergrowth compound. The depressed and asymmetric semicircles of Cole-Cole plots suggest that the charge carriers are of non-Debye (multiple) type. The charge carriers were found to be controlled by thermally-activated process. Temperature dependent ac-conductivity data show change of slopes in the vicinity of intermediate and higher frequency domain. Finally, results were corroborated to the dielectric and FTIR data. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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