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We report the synthesis of Co2+ substituted Mg–Cu–Zn ferrite via citrate gel combustion process and thereby its structural, transport, and magnetic properties for the use in electromagnetic energy absorption application. The polycrystalline ferrite system is investigated by interplay of stoichiometric composition with Mg0.25–xCoxCu0.25Zn0.5Fe2O4 (0 ≤ x ≤ 0.25). Structural investigations using X-ray diffraction (XRD) and selected area electron diffraction (SAED) reveal the formation of spinel structure with linear growth of lattice constant due to Co2+ substitution. The microstructural analysis (TEM and SEM) depicts the dense microstructure with the average grain size of 0.42– 1.25 µm. The elemental analysis (EDS) confirms the elemental composition of the as-prepared ferrite with respect to the initial concentrations of the synthetic composition used. The observed variations in initial permeability ( μi) and magnetic moment ( nB) are explained based on deviation in saturation magnetization ( Ms), anisotropy constant ( K1), density values, and exchange interaction. The temperature dependence of DC resistivity confirms the semiconducting behavior of the as-prepared ferrite material, with an increase in the DC resistivity by an incorporation of cobalt. Furthermore, the effects of adding Co2+ on the Curie temperature, frequency dependent dielectric properties of the ferrite material are also discussed.


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Co2+ substituted Mg–Cu–Zn ferrite: Evaluation of structural, magnetic, and electromagnetic properties

Show Author's information L. M. THORATaJ. Y. PATILbD. Y. NADARGIbU. R. GHODAKEcR. C. KAMBALEdS. S. SURYAVANSHIb( )
Department of Electronics, S. M. Dnyandeo Mohekar Mahavidyalaya, Kalamb - 413507, Maharashtra, India
School of Physical Sciences, Solapur University, Kegaon, Solapur - 413255, Maharashtra, India
Department of Electronics, Shri Shivaji Mahavidyalaya, Barshi - 413401, Solapur, Maharashtra, India
Department of Physics, Savitribai Phule Pune University, Ganeshkhind, Pune - 411007, Maharashtra, India

Abstract

We report the synthesis of Co2+ substituted Mg–Cu–Zn ferrite via citrate gel combustion process and thereby its structural, transport, and magnetic properties for the use in electromagnetic energy absorption application. The polycrystalline ferrite system is investigated by interplay of stoichiometric composition with Mg0.25–xCoxCu0.25Zn0.5Fe2O4 (0 ≤ x ≤ 0.25). Structural investigations using X-ray diffraction (XRD) and selected area electron diffraction (SAED) reveal the formation of spinel structure with linear growth of lattice constant due to Co2+ substitution. The microstructural analysis (TEM and SEM) depicts the dense microstructure with the average grain size of 0.42– 1.25 µm. The elemental analysis (EDS) confirms the elemental composition of the as-prepared ferrite with respect to the initial concentrations of the synthetic composition used. The observed variations in initial permeability ( μi) and magnetic moment ( nB) are explained based on deviation in saturation magnetization ( Ms), anisotropy constant ( K1), density values, and exchange interaction. The temperature dependence of DC resistivity confirms the semiconducting behavior of the as-prepared ferrite material, with an increase in the DC resistivity by an incorporation of cobalt. Furthermore, the effects of adding Co2+ on the Curie temperature, frequency dependent dielectric properties of the ferrite material are also discussed.

Keywords:

Co–Mg–Cu–Zn ferrite, spinel phase, electrical resistivity, saturation magnetization, anisotropy constant, Curie temperature
Received: 06 January 2018 Revised: 27 March 2018 Accepted: 28 March 2018 Published: 10 October 2018 Issue date: September 2018
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Publication history

Received: 06 January 2018
Revised: 27 March 2018
Accepted: 28 March 2018
Published: 10 October 2018
Issue date: September 2018

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© The author(s) 2018

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