Impact of Mn-substitution on structural, optical, and magnetic properties evolution of sodium–cobalt ferrite for opto-magnetic applications

Mixed-metal oxide spinel ferrite nanoparticles of composition Na 0.5 Mn x Co (0.5− x ) Fe 2 O 4 (where x  = 0.0, 0.1, 0.3, and 0.5) were synthesized successfully through a well-known citrate sol–gel autocombustion method. X-ray diffraction approach, transmission electron microscope, scanning electro...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2020-04, Vol.31 (8), p.6224-6232
Main Authors: ElNahrawy, Amany M., Mansour, A. M., ElAttar, Hoda A., Sakr, Elham M. M., Soliman, Aisha A., Hammad, Ali B. Abou
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cobalt ferrites
Crystallites
Electron microscopes
Energy gap
Fourier transforms
Magnetic properties
Magnetic saturation
Magnetometers
Manganese
Materials Science
Metal oxides
Nanoparticles
Optical and Electronic Materials
Optical properties
Sodium
Sol-gel processes
Spinel
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Summary:Mixed-metal oxide spinel ferrite nanoparticles of composition Na 0.5 Mn x Co (0.5− x ) Fe 2 O 4 (where x  = 0.0, 0.1, 0.3, and 0.5) were synthesized successfully through a well-known citrate sol–gel autocombustion method. X-ray diffraction approach, transmission electron microscope, scanning electron microscope, and spectroscopic Fourier transform infrared were used to investigate the microstructure and the formation of the composites. Diffuse reflectance was employed to investigate the optical properties and estimating of optical band gap type and value. The magnetic analysis was made by employing a vibrating sample magnetometer. It was found that the average crystallite size increases with the increase of manganese (Mn) content. The formation of the spinel structure of Mn-doped Na-CFO was confirmed by FTIR spectra. The direct optical band gap was observed through the Kubelka–Munk function calculation of diffusely reflected light. The saturation magnetization decreases with the addition of Mn cations.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-020-03176-2