Ni0.7Cu0.3Fe2O4 nanoparticles were synthesized via sol-gel combustion technique, co-precipitation method and solid state milling method. Simultaneous thermogravimetric and differential thermal analysis (TG-DTA) was carried out to monitor the decomposition process of the precursors. The samples were characterized by Fourier transform infrared (FT-IR), inductively coupled plasma spectroscopy (ICPS), X-ray diffraction (XRD), BET surface area measurement, scanning electron microscopy (SEM), transmission electron microscopy (TEM), temperature progra...