Fourier transform infrared spectroscopy study of Cr3+ ions substituted copper ferrite nanoparticles

Abstract

A series of multi crystalline nano ferrites having the chemical formula CuCrxFe2- xO4 (x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) were successfully synthesized by using self-propagating sol-gel auto combustion method. The X-ray diffraction patterns were recorded at room temperature. in 2 range 20° to 80°. The X-ray diffraction pattern confirms the formation of a single-phase cubic spinel structure of Cr3+ ions substituted copper ferrite. The Fourier transform infrared (FTIR) spectroscopy also shows two significant bands due to interatomic vibrations tetrahedral and octahedral coordination compound. The FTIR analysis explains the two absorption bands 1 and 2 assigned at tetrahedral (A) and octahedral (B) sites respectively. The values of 1 are lower as compared to 2, so there is an impact produced on force constant K1 and K2. The nature of absorption bands in the spectra depends on the distribution and type of cations among octahedral and tetrahedral sites.