Gallium induced effect on magnetic, magnetostrictive and electrical properties of sintered NiFe2O4

Shashanka, HM and Singh, DN and Chelvane, JA and Anantharamaiah, PN (2024) Gallium induced effect on magnetic, magnetostrictive and electrical properties of sintered NiFe2O4. In: Inorganic Chemistry Communications, 161 (161).

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Abstract

This study investigates how the incorporation of Ga ions into the tetrahedral coordination sites affects the magnetic, magnetostrictive, and electrical properties of sintered NiFe2O4. All characterization was performed on the sintered NiFe2-xGaxO4 samples, which were synthesized using the autocombustion method. The sintered samples exhibit a single phase, wherein the lattice parameter decreases, and the particle size increases with the augmentation of Ga-content within the Ni-ferrite lattice. Saturation magnetization (MS) was found to be higher for x = 0.25 compared to the parent sample (x = 0), while for x = 0.5, MS was slightly lower than that of the parent sample. Both coercivity (HC) and Curie temperature (TC) exhibited a decrease with increasing 'x,' which can be attributed to the weakening of superexchange interactions (A-O-B) due to the presence of non-magnetic Ga ions. Furthermore, the maximum magnetostriction (λmax) also decreased with increasing 'x,' reflecting a magnetic dilution effect within the system. Electric modulus analysis of the dielectric response and the Jonscher power law fits AC conductivity propounded the long-range hoping for charge transportation. Also, the Cole-Cole fit of impedance spectra showed a combined effect of electrode-grain boundary, grain interior, and grain-grain boundary. © 2024 Elsevier B.V.

Item Type:	Journal Article
Publication:	Inorganic Chemistry Communications
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	29 Feb 2024 12:16
Last Modified:	29 Feb 2024 12:16
URI:	https://eprints.iisc.ac.in/id/eprint/83889

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