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    Synthesis of Ce3+ substituted Ni-Co ferrites for high frequency and memory storage devices by sol-gel route

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    Publication date
    2022-03
    End of Embargo
    2023-12-28
    Author
    Sheikh, F.A.
    Noor ul Huda Khan Asghar, H.M.
    Khalid, M.
    Gilani, Z.A.
    Ali, S.M.
    Khan, N.
    Shar, Muhammad A.
    Alhazaa, A.
    Keyword
    Ni-Co ferrites
    Sol-gel method
    FE-TEM
    Magnetic properties
    Dielectric properties
    Memory storage devices
    Rights
    © 2022 Elsevier B.V. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    Yes
    Open Access status
    embargoedAccess
    
    Metadata
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    Abstract
    Cerium (Ce3+) substituted Ni-Co ferrites with composition Ni0.3Co0.7CexFe2−xO4 (x = 0.0–0.20, with step size 0.05) were synthesized by sol-gel method. Face-centered cubic (FCC) spinel structure was revealed by X-ray analysis. The crystalline size was calculated ranging between 17.1 and 18.8 nm, lattice constant showed a decreasing trend with increase of Ce3+ contents, furthermore, X-ray density was calculated between 5.30 and 5.69 g/cm3. The two characteristic spinel ferrites absorption bands were seen around 550 (cm−1) and 415 (cm−1) in Fourier transform infra-red (FTIR) spectroscopy. The microstructural and elemental studies were carried out by field emission transmission electron microscopy (FE-TEM) and energy dispersive X-ray (EDX) respectively, the average particle size was calculated around 21.83 nm. Magnetic studies were per- formed by vibrating sample magnetometer (VSM), which showed that saturation magnetization Ms and remanence Mr decreased with substitution up to x = 0.10 due to small magnetic moment of Ce3+ than Fe3+. The coercivity Hc increased with substitution up to 908.93 Oe at x = 0.05, then it decreased following the trend of anisotropy constant. The dielectric studies exhibited decrease in dielectric parameters with fre- quency due to decreasing polarization in material. The dielectric loss was significantly decreased in material at high frequency. The Cole-Cole interpretation exhibited conduction mechanism being caused by grain boundary density. These attributes of Ce3+ substituted Ni-Co ferrites suggest their possible use in memory storage, switching and high frequency devices like antenna and satellite systems.
    URI
    http://hdl.handle.net/10454/19309
    Version
    Accepted manuscript
    Citation
    Sheikh FA, Noor ul Huda Khan Asghar HM, Khalid M et al (2023) Synthesis of Ce3+ substituted Ni-Co ferrites for high frequency and memory storage devices by sol-gel route. Journal of Alloys and Compounds. 938: 168637.
    Link to publisher’s version
    https://doi.org/10.1016/j.jallcom.2022.168637
    Type
    Article
    Notes
    The full-text of this article will be released for public view at the end of the publisher embargo on 28 Dec 2023.
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