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Structural, magnetic and dielectric properties of magnesium doped nickel ferrite nanoparticles


Citation

H., Moradmard and S., Farjami Shayesteh and P., Tohidi and Abbas, Zulkifly and M., Khaleghi (2015) Structural, magnetic and dielectric properties of magnesium doped nickel ferrite nanoparticles. Journal of Alloys and Compounds, 650. pp. 116-122. ISSN 0925-8388; ESSN: 1873-4669

Abstract

Magnesia doped nickel ferrite nanopowders (Ni1−xMgxFe2O4, x = 0, 0.1, 0.3, 0.5, 0.7) have been synthesized by co-precipitation method and all samples were annealed at 900 °C. The structural, morphological and magnetic properties of the products were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX) spectroscopy and vibrating sample magnetometer (VSM). Also microwave dielectric properties were measured at frequencies 1 GHz–12 GHz. XRD analysis indicates that all samples have spinel structure and there is not any extra phase in all samples. The increase in magnesia concentration caused to variation in the average crystallite size and lattice constant. Doping magnesia in nickel ferrite gave rise to a decrease in the saturation magnetization whereas doping led to increase in coercivity field. The parameters like dielectric constant, dielectric loss and ac conductivity of the nanoparticles samples are studied in the frequency range from 1 to 12 GHz. All these parameters show, size dependent variations. Complex dielectric permittivity of samples was decreased by increasing in frequency.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1016/j.jallcom.2015.07.269
Publisher: Elsevier
Keywords: Mg-doped nickel ferrite; Spinel structure; Dielectric permittivity; Magnetic properties
Depositing User: Nida Hidayati Ghazali
Date Deposited: 27 Mar 2018 07:13
Last Modified: 27 Mar 2018 07:13
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.jallcom.2015.07.269
URI: http://psasir.upm.edu.my/id/eprint/46403
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