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Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique

Hussain, Mudassar, Misbah-ul-Islam, Misbah-ul-Islam, Meydan, Turgut, Cuenca, Jerome A., Melikhov, Yevgen, Mustafa, Ghulam, Murtaza, Ghulam and Jamil, Yasir 2018. Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique. Ceramics International 44 (6) , pp. 5909-5914. 10.1016/j.ceramint.2017.12.145

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Abstract

A series of co-precipitated Zn1−xCoxGdyFe2−yO4 spinel ferrites (x =0.0–0.5, y=0.00–0.10) sintered at 1000 °C were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), vibrating sample magnetometery (VSM) and microwave cavity perturbation (MCP). XRD patterns and FTIR spectra reveal formation of the spinel phase along with few traces of GdFeO3 second phase. The lattice constant decreases with an increasing amount of CoGd ions due to the segregation of Gd3+on the grain boundaries and due to replacement of lager Zn2+ ions with smaller Co2+ ions. SEM shows grain size to decrease with the increase of CoGd contents due to grain growth inhibition by the second phase. VSM results show remanence and saturation magnetization to exhibit an increasing trend due to Co substitution on octahedral sites and presence of a second phase. The coercivity increases with the increase of CoGd contents due to anisotropic nature of Co. MCP shows the complex magnetic permeability to increase with CoGd concentration while the complex permittivity decreases.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: Q Science > QC Physics
Publisher: Elsevier Ltd and Techna Group
ISSN: 0272-8842
Date of First Compliant Deposit: 14 February 2018
Date of Acceptance: 20 December 2017
Last Modified: 03 Jul 2019 08:22
URI: http://orca.cf.ac.uk/id/eprint/109107

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