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Tunable structures of copper substituted cobalt nanoferrites with prospective electrical and magnetic applications

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Abstract

Spinel ferrites (SFs) show high potential in different aspects of modern technology. Particularly, copper ferrite represents a promising electrode material for supercapacitors and lithium based batteries. This paper is devoted to synthesizing and characterizing nanostructured copper substituted cobalt ferrites using an eco-friendly sol–gel method. Energy dispersive X-ray (EDX) and FT-IR analyses confirm the chemical composition and the successful formation of the cubic phase of CuFe2O4, respectively. XRD analyses based on Williamson–Hall (W–H) method indicate that the average crystallite size drops from 25.1 to 12.1 nm dependent on the Cu2+ content in the samples. Further, scanning electron microscopy (SEM) reveals that the CoFe2O4 (CFO) has a honeycomb structure, which gradually disappears with the soaring of Cu2+ content in the samples and converts to a porous sponge-like shape structure. The investigated copper substituted CFO holds a high specific surface area equals to 102.5139 m2 g−1 which satisfies the contaminant adsorption applications. The measured DC resistivity (ρDC = 108 Ω m) is high enough to meet the requirements of transformer cores applications. Due to the difference in the magnetic moment between Cu2+ and Co2+ cations, the coercivity of the CFO significantly depends on the Cu2+ content; it has declined by more than 50% for the system Co0.25Cu0.75Fe2O4 in comparison to the pure CFO (Hc = 1617.30 Gauss).

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Acknowledgements

The authors thank the Materials Science Unit, Radiation Physics Department, National Center for Radiation Research and Technology, Egypt, for financing and supporting this study under the project Synthesizing and Characterizations of Nanostructured Magnetic Materials.

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Authors and Affiliations

  1. Materials Science Lab., Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt

    M. I. A. Abdel Maksoud, M. M. Atta & A. H. Ashour

  2. Center of Photonics and Smart Materials, Zewail City of Science and Technology, 6th of October, Giza, Egypt

    Ahmed El-ghandour

  3. Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt

    Gharieb S. El-Sayyad & Ahmed I. El-Batal

  4. Physics Department, Faculty of Science, Damietta University, New Damietta, Damietta, Egypt

    A. S. Awed

  5. Radiation Protection and Dosimetry Department, National, Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt

    Ramy Amer Fahim

  6. Chemical Engineering Department, Military Technical College, Egyptian Armed Forces, Cairo, Egypt

    Mohamed Gobara

  7. Physics Department, Faculty of Science (Boys Branch), Al-Azhar University, Cairo, Egypt

    E. K. Abdel-Khalek & M. M. El-Okr

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  1. M. I. A. Abdel Maksoud
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Correspondence to M. I. A. Abdel Maksoud.

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Maksoud, M.I.A.A., El-ghandour, A., El-Sayyad, G.S. et al. Tunable structures of copper substituted cobalt nanoferrites with prospective electrical and magnetic applications. J Mater Sci: Mater Electron 30, 4908–4919 (2019). https://doi.org/10.1007/s10854-019-00785-4

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