Fabrication and characterization of CoFe2O4/CoFe2/SiO2 nanocomposite particles

In this paper, we chose nonmagnetic SiO2 to coat on CoFe2O4/CoFe2 nanoparticles by reducing CoFe2O4/SiO2 nanoparticles in hydrogen at different temperatures. The effects of the reduction time (tr) and calcination temperature (Tc) on structural and magnetic properties of samples are investigated.