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The influence of Cd doping on the microstructure and optical properties of nanocrystalline copper ferrite thin films

[Display omitted] ► The structural and optical properties of Cu1−xCdxFe2O4 thin films were studied. ► The micro structural parameters of the films have been determined. ► The room temperature reflectance and transmittance data are analyzed. ► The refractive index and energy gap are determined. ► The...

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Bibliographic Details
Published in:Materials research bulletin 2013-06, Vol.48 (6), p.2279-2285
Main Authors: El-Hagary, M., Matar, A., Shaaban, E.R., Emam-Ismail, M.
Format: Article
Language:English
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Summary:[Display omitted] ► The structural and optical properties of Cu1−xCdxFe2O4 thin films were studied. ► The micro structural parameters of the films have been determined. ► The room temperature reflectance and transmittance data are analyzed. ► The refractive index and energy gap are determined. ► The single oscillator parameters were calculated. Nanocrystalline thin films of mixed Cu–Cd ferrites, Cu1−xCdxFe2O4 (x=0, 0.2, 0.3, 0.5, 0.7, 0.8, 0.9 and 1), were deposited by electron beam evaporation technique. The films were annealed at 450°C for 1h. The effect of Cd doping on the structural and optical properties of the deposited films has been investigated by using X-ray diffraction (XRD) and optical spectrophotometry. XRD patterns of the annealed films show spinal cubic structure. The lattice parameter was found to increase with the increase of cadmium concentration. The crystallite size of the films was found to vary from 8nm to 30nm. The optical transition was found to be direct and indirect transitions with energy gaps decrease from 2.466 (x=0) to 2.00 (x=1)eV and from 2.148 (x=0) to 1.824 (x=1)eV, respectively. The refractive index dispersion of the films was found to increase with Cd content and discussed in terms of the Wemple–DiDomenico single oscillator model.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2013.02.065