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Structural and Electrical Properties of Magnesium-Doped CoFe2O4

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Powder Metallurgy and Metal Ceramics Aims and scope

In this paper, magnesium-doped CoFe2O4 (Co0.5Mg0.5Fe2O4) compound was synthesized by a solidstate reaction route. The impact of Mg inclusion on the structural parameters of the obtained compound and the subsequent development of thermally-assisted electro-active areas has been systematically examined, as this compound has a fit composition for doping at the site of Co due to its relevantly equal atomic radius. Also, Mg was established as highly ferroelectric and low-weight material. The compound structure and microstructure have been analyzed using the method of scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The dielectric properties were studied over a broad spectrum of frequency and temperature, and quite low dielectric loss was recorded. In the context of impedance and conductivity formalism, frequency-dependent electrical information has been evaluated at varying temperatures. The Nyquist plot represents the effect of grain and grain boundary. Thermally activated non-Debye type relaxation processes were observed in the composites. Jonscher universal power law follows the frequency-dependent AC conductivity at different temperatures. Temperature dependence of AC conductivity at various frequencies indicates a negative temperature coefficient of resistance (NTCR) behavior. Estimating the magnitudes of activation energies in different temperature ranges enables defining the nature of the species involved in the conduction system.

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Authors and Affiliations

  1. Centurion University of Technology and Management, Odisha, India

    D. Mohanty, P.K. Nayak & S.K. Satpathy

  2. Materials Research Laboratory, School of Physics, Sambalpur University, JyotiVihar, Burla, Odisha, 768019, India

    A.U. Naik & Banarji Behera

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  1. D. Mohanty
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  2. A.U. Naik
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  3. P.K. Nayak
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  4. Banarji Behera
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  5. S.K. Satpathy
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Correspondence to S.K. Satpathy.

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Published in Poroshkova Metallurgiya, Vol. 59, Nos. 9–10 (535), pp. 32–40, 2020.

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Mohanty, D., Naik, A., Nayak, P. et al. Structural and Electrical Properties of Magnesium-Doped CoFe2O4. Powder Metall Met Ceram 59, 507–514 (2021). https://doi.org/10.1007/s11106-021-00190-9

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