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- Title
Tunable structures of copper substituted cobalt nanoferrites with prospective electrical and magnetic applications.
- Authors
Maksoud, M. I. A. Abdel; El-ghandour, Ahmed; El-Sayyad, Gharieb S.; Awed, A. S.; Fahim, Ramy Amer; Atta, M. M.; Ashour, A. H.; El-Batal, Ahmed I.; Gobara, Mohamed; Abdel-Khalek, E. K.; El-Okr, M. M.
- 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).
- Subjects
COBALT; MAGNETIC fields; MAGNETIC properties; FERROMAGNETIC materials; X-ray diffraction
- Publication
Journal of Materials Science: Materials in Electronics, 2019, Vol 30, Issue 5, p4908
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-019-00785-4