Studies on Structural, Infrared and Optical Properties of Cobalt Ferrite Thin Film Grown by Spray Pyrolysis Technique

Abstract

Thin film of cobalt ferrite has been deposited on glass substrate by a chemical spray pyrolysis technique using methanol solutions at 400◦C substrate temperature. The uniformly deposited thin film were annealed at 500 ◦C and studied their structural, infrared and optical properties using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and UV-Vis spectroscopy (UV-Vis), respectively. The X-ray diffraction patterns revealed single phase cubic spinel structure with space group Fd-3m. The fundamental absorption bands related to octahedral and tetrahedral sites were confirmed by Fourier-transform infrared spectroscopy (FTIR) spectrum.The formation of cubic spinel crystal structure of the CoFe2O4 thin filmwere confirmed from exhibited strong absorption peaks around 530.21 and 451.48 cm−1 by FT-IR spectra.The optical properties of the deposited thin film were studied by an absorbance spectrum found at 315 nm. The value of energy bandgap (2.4 eV) wasinvestigated by Tauc plot.The obtained results indicate the fabricated thin film is promising material for various applications.