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Influence of Fe substitution on structural and electrical properties of Gd orthochromite ceramics

Shanker, Jada and Venkataramana, K and Prasad, Vittal B and Kumar, Vijaya R and Babu, DS (2018) Influence of Fe substitution on structural and electrical properties of Gd orthochromite ceramics. In: JOURNAL OF ALLOYS AND COMPOUNDS, 732 . pp. 314-327.

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Official URL: http://dx.doi.org/10.1016/j.jallcom.2017.10.085


Structural and dielectric properties of GdCr1-xFexO3 perovskite ceramic nanoparticles prepared by sol-gel auto-combustion method are presented. The structural investigations of these samples confirmed the single-phase orthorhombic symmetry with Pbnm space group. Lattice parameters and unit cell volume were calculated and found to increase with an increase in Fe concentration. The estimated average grain size from SEM is found to be 80 nm and increased with an increase in Fe content. Impedance spectroscopy has been employed to investigate the frequency (1 Hz-1MHz), temperature (RT-500 degrees C) and composition dependent impedance, dielectric and conductivity of compounds. All these materials are found to be semiconducting in nature. All the materials except x = 1 showed colossal dielectric constant (epsilon' > 10(3)) at room temperature. Both electrical conductivity and dielectric constant were found to be maximum for x = 0.4 sample. (C) 2017 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Depositing User: Id for Latest eprints
Date Deposited: 23 Dec 2017 06:25
Last Modified: 21 Feb 2019 11:17
URI: http://eprints.iisc.ac.in/id/eprint/58497

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