High temperature dielectric studies of indium-substituted NiCuZn nanoferrites

Hashim, M. and Raghasudha, M and Shah, J. and Shirsath, S.E. and Ravinder, D. and Kumar, S. and Meena, S.S., and Bhatt, P. and Alimuddin, . and Kumar, R. 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 223697

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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 °C at different frequencies from 102 Hz to 5 × 106 Hz. The variations in the dielectric parameters ε′ and (tanδ) 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. Mӧssbauer spectroscopy was employed at room temperature to characterize the magnetic behavior.

Item Type: Article
Uncontrolled Keywords: Ceramics; Chemical synthesis; Dielectric properties; Mössbauer spectroscopy; X-ray diffraction
Subjects: T Technology > T Technology (General)
Divisions: Faculties > Faculty of Engineering and Technology > Zakir Husain College of Engineering & Technology > Department of Applied Physics
Depositing User: AMU Library
Date Deposited: 20 Jan 2018 06:55
Last Modified: 20 Jan 2018 06:55
URI: http://ir.amu.ac.in/id/eprint/10887

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