Hashim, Mohd and Raghasudha, M. and Shah, Jyoti and Shirsath, Sagar E. and Ravinder, D. and Kumar, Shalendra and Meena, Sher Singh and Bhatt, Pramod and -, Alimuddin and Kumar, Ravi and Kotnala, R. K. (2018) High temperature dielectric studies of indium-substituted NiCuZn nanoferrites. Journal of Physics and Chemistry of Solids, 112. pp. 29-36. ISSN 0022-3697

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Abstract

In this study, indium (In3+)-substituted NiCuZn nanostructured ceramic ferrites with a chemical composition of Ni0.5Cu0.25Zn0.25Fe2-xInxO4 (0.0 <= x <= 0.5) were prepared by chemical synthesis involving sol-gel chemistry. Single phased cubic spinel structure materials were prepared successfully according to X-ray diffraction and transmission electron microscopy analyses. The dielectric properties of the prepared ferrites were measured using an LCR HiTester at temperatures ranging from room temperature to 300 degrees C at different frequencies from 10(2) Hz to 5 x 10(6) Hz. The variations in the dielectric parameters epsilon' and (tan delta) with temperature demonstrated the frequency- and temperature-dependent characteristics due to electron hopping between the ions. The materials had low dielectric loss values in the high frequency range at all temperatures, which makes them suitable for high frequency microwave applications. A qualitative explanation is provided for the dependences of the dielectric constant and dielectric loss tangent on the frequency, temperature, and composition. Mossbauer spectroscopy was employed at room temperature to characterize the magnetic behavior.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Chemistry Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	21 Nov 2019 07:01
Last Modified:	21 Nov 2019 07:01
URI:	http://npl.csircentral.net/id/eprint/3914

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