In this work nanometric spinel Co1−xCuxFe2O4 powders were obtained by polymeric precursors method at several annealing temperatures between 700 and 1200 ∘C. The samples were characterized by means of X-ray powder diffraction, confirming the ideal inverse spinel structure for CoFe2O4 sample and the tetragonal distorted inverse spinel structure for CuFe2O4 sample. Based on FWHM evaluation, we estimated that crystallite sizes varies between 27 and 37 nm for the non-substituted samples. The optical-active modes were determined by infrared and Raman spectroscopies. The phonon spectra showed a local tetragonal distortion for mixed samples.
@article{arxiv.1301.7716,
title = {Cobalt Substitution in CuFe$_{2}$O$_{4}$ spinel and its influence on the crystal structure and phonons},
author = {M. D. P. Silva and F. C. Silva and F. S. M. Sinfrônio and Alexandre Rocha Paschoal and E. N. Silva and Carlos William de Araujo Paschoal},
journal= {arXiv preprint arXiv:1301.7716},
year = {2013}
}