Yes / 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. / The authors would like to acknowledge the Researcher's Supporting Project Number (RSP-2021/269) King Saud University, Riyadh, Saudi Arabia, for their support in this work.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/19309 |
| Date | 28 December 2022 |
| Creators | 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. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article, Accepted manuscript |
| 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., CC-BY-NC-ND |
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