Structural, optical and morphological properties of zinc -doped cobalt-ferrites CoFe2−xZnxO4 (x=0.1-0.5)

Abstract

Cobalt-ferrite (CoFe2O4) based nanoparticles are appropriate candidates for electrical, optical, and magnetic applications for electrical appliances. In the current study, a coprecipitation technique was used to prepare Zinc doped cobalt ferrites with compositions CoFe2−xZnxO4 (x=0.1-0.5) at various percentages using Zinc and Co-nitrate as precursors. The analysis of crystal phase structure, hkl planes, average crystalline size, volume, and lattice parameters of the unit cell of CoFe2-xZnxO4 doped (NPs) was carried under X-ray diffraction (XRD). X-ray spectra analysis, FT-IR Spectra, UV Visible Spectra, and SEM studies shown that the as-synthesized powders were contained of nano-crystallite size (42– 53nm) cubic-spinel phase with irregularly-structure. Calcination at low temperature (80˚C) of the precursor followed through sintering (500°C for 3h) con-sequence in a single-phase cubic-spinel shape with an average particle size of 42-53nm, as shown by scanning electron micrographs images. Sharp peaks and intense diff raction features in XRD pattern show that an increase in Zn doping concentration in cobalt spinel ferrite increases the crystalline behavior of the cubical spine phase. In cubical structure ferrites crystal lattices, the absorption band at low frequency is noticed above 400cm-1 but in the range of 300- 600cm-1 of the Fourier Transform Infrared bands were attributed to the tremblant of the ions of metal. The absorbance results of UV Spectra indicate that Zinc doped Cobalt Ferrite specimen had symbolic absorbance in the range of 660-900nm wavelength range of the conspicuous region. The Zn-doped cobalt-ferrite have a high strain derivative that could be a prospective material for electrical devices.