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Physical properties, magnetic measurements, dielectric relaxation, and complex impedance studies of cobalt-doped zinc ferrite nanoparticles

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Abstract

Pure and cobalt-doped zinc nanoferrites (Zn1−xCoxFe2O4, x = 0.00, 0.03, 0.06, 0.09) have been successfully prepared by cost-effective co-precipitation method. The formation of single spinel ferrites, purity, structure, and cation distribution of the material was determined by the X-ray diffraction method at room temperature. The phase formation, elemental composition and surface morphology were confirmed from the FTIR spectroscopy and SEM. The significant difference between the theoretical and experimental values of magnetic moments recommends that the magnetic order of the existing system is Yafet–Kittle (Y–K) type magnetic order. The complex impedance spectroscopy was performed in the range of frequency from 100 Hz to 2 MHz at various temperature ranges from 300 to 570 K with the step of 30 K. The experimental data are fitted to equivalent circuits to obtain grain and grain boundaries capacitance and resistance. The alternating current (a.c) and direct current (d.c) conductivities are estimated from measured data of the dielectric parameters. The application of plots of Jonscher’s power law showed the correlation barrier hop** (CBH) process can explain the conduction phenomenon in Zn1−xCoxFe2O4 nanoferrites system.

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Acknowledgements

This research is financially supported by the Pakistan Academy of Sciences (PAS). Dr. M. Nawaz Khan is acknowledged for useful discussion.

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  1. Nano-Scale Physics Laboratory, Department of Physics, Faculty of Basic and Applied Sciences, Air University, Islamabad, Pakistan

    Aamir Mahmood & Asghari Maqsood

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Mahmood, A., Maqsood, A. Physical properties, magnetic measurements, dielectric relaxation, and complex impedance studies of cobalt-doped zinc ferrite nanoparticles. Appl Nanosci 11, 2311–2336 (2021). https://doi.org/10.1007/s13204-021-02007-y

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