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Synthesis of Ce3+ substituted Ni-Co ferrites for high frequency and memory storage devices by sol-gel route
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.
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.
Publication Date
2022-03
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© 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.
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openAccess
Accepted for publication
2022-12-26
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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.
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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.
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Article