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Ni2+-substituted Mg–Cu–Zn ferrites: a colloidal approach of tuning structural and electromagnetic properties

Ni2+-substituted Mg–Cu–Zn ferrites: a colloidal approach of tuning structural and electromagnetic... A robust synthesis approach to Ni2+-substituted Mg0.25-x Ni x Cu0.25Zn0.5Fe2O4 (0 ≤ x ≤ 0.25 mol.) ferrimagnetic oxides using citrate assisted sol–gel process is reported. The route utilizes simple metal nitrate precursors in aqueous solution, thus eliminating the need for organometallic precursors. Citric acid acts as a fuel for the combustion reaction and forms stable complexes with metal ions preventing the precipitation of hydroxilated compounds to yield the composite ferrite structure by auto-combustion process. The XRD signatures, especially (3 1 1) plane, confirmed the formation of spinel structure. The linear growth of lattice constant from 8.385 to 8.409 Å was observed by Ni2+ substitution from 0 to 0.25. The dense microstructure is observed with the average grain size of 0.42–2.18 µm. The transport properties revealed the semiconducting behavior of as-prepared ferrite material, with an increase in the DC-electrical resistivity by the incorporation of nickel. The magnetic properties viz. initial permeability (µ i) and magnetic moment (n B) are explained, based on the deviation in saturation magnetization (M s), anisotropy constant (K 1), density values, and exchange interactions. Furthermore, the effect of adding Ni2+ on the Curie temperature, frequency-dependent dielectric properties of the ferrite material are also discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Sol-Gel Science and Technology Springer Journals

Ni2+-substituted Mg–Cu–Zn ferrites: a colloidal approach of tuning structural and electromagnetic properties

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Ceramics, Glass, Composites, Natural Materials; Inorganic Chemistry; Optical and Electronic Materials; Nanotechnology
ISSN
0928-0707
eISSN
1573-4846
DOI
10.1007/s10971-018-4665-3
Publisher site
See Article on Publisher Site

Abstract

A robust synthesis approach to Ni2+-substituted Mg0.25-x Ni x Cu0.25Zn0.5Fe2O4 (0 ≤ x ≤ 0.25 mol.) ferrimagnetic oxides using citrate assisted sol–gel process is reported. The route utilizes simple metal nitrate precursors in aqueous solution, thus eliminating the need for organometallic precursors. Citric acid acts as a fuel for the combustion reaction and forms stable complexes with metal ions preventing the precipitation of hydroxilated compounds to yield the composite ferrite structure by auto-combustion process. The XRD signatures, especially (3 1 1) plane, confirmed the formation of spinel structure. The linear growth of lattice constant from 8.385 to 8.409 Å was observed by Ni2+ substitution from 0 to 0.25. The dense microstructure is observed with the average grain size of 0.42–2.18 µm. The transport properties revealed the semiconducting behavior of as-prepared ferrite material, with an increase in the DC-electrical resistivity by the incorporation of nickel. The magnetic properties viz. initial permeability (µ i) and magnetic moment (n B) are explained, based on the deviation in saturation magnetization (M s), anisotropy constant (K 1), density values, and exchange interactions. Furthermore, the effect of adding Ni2+ on the Curie temperature, frequency-dependent dielectric properties of the ferrite material are also discussed.

Journal

Journal of Sol-Gel Science and Technology – Springer Journals

Published: May 11, 2018

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