Controlled preparation of monodisperse CoFe sub(2)O sub(4) nanoparticles by a facile method

CoFe sub(2)O sub(4) nanoparticles (NPs) were synthesized by coprecipitation method using FeCl sub(3).6H sub(2)O and CoCl sub(2).6H sub(2)O as precursors. The synthesized conditions were optimized, such as added means of precipitator, quantity of precipitator, the mol ratio of Fe super(3+) to Co super(2+), reaction temperature and pH value. The synthesized material was characterized by XRD, TEM, FTIR, EDS, Raman and its magnetic properties were studied by VSM. The experimental results confirm that the sample is cubic spinel structure CoFe sub(2)O sub(4) with a narrow size distribution and a good dispersion feature. CoFe sub(2)O sub(4) NPs with well-controlled shape and size was obtained at 70 degree C. The magnetic properties indicate superparamagnetic behavior and good saturated magnetization.