CoFe2O4 nanostructures have successfully via the auto-combustion sol-gel method. The effects of the calcined temperatures (600, 700 and 800 degrees C) on the structural and magnetic properties of CoFe2O4 were studied by XRD and VSM analysis. Well defined and sharp peaks corresponding to the CoFe2O4 were developed by increasing the calcination temperature in the XRD pattern. The functional groups of as prepared and calcined sample were identified by the FTIR spectra analysis. The VSM measurements showed that the saturation magnetization and coercivity increase with increasing calcination temperature. Significant differences in the magnetic properties of the CoFe2O4 nanoparticles have been observed and these differences seem to result from the calcination temperature of the spinel ferrite nanoparticles. (C) 2018 Elsevier B. V. All rights reserved.