Impact of composition ratio on the structure and optical properties of (1-x)MnFe₂O₄/(x)ZnMn₂O₄ nanocomposite

Abstract (1-x)MnFe2O4 (MFO)/xZnMn2O4 (ZMO) (x=0, 0.2, 0.5, 0.8, 1) nanocomposite samples were prepared using co-precipitation procedure. The phase percentage, cell parameters, and crystallite size of MFO and ZMO phases in each nanocomposite sample was calculated using Rietveld refinement procedure. X-ray diffraction analysis and Fourier-transform infrared spectroscopy techniques established the variation in the lattice parameters of each phase is due to permutation all cations among the octahedral and tetrahedral sites of MFO and ZMO. The different oxidation states of different ions in all samples were determined using X-ray photoelectron spectroscopy (XPS) technique. The variation in absorbance of the nanocomposite samples with composition parameter (x) is dependent on the wavelength region. The optical bandgap of the nanocomposite samples is decreased as the content of ZMO phase increased. The effect of alloying on the refractive index, extinction coefficient, dielectric constant, optical conductivity and the nonlinear optical behaviors of all samples was studied in detail. The nanocomposite sample x=0.5 disclosed upgraded optical parameters with the highest refractive index, optical conductivity, and PL intensity, which nominate it to be functional in various application fields.