Preparation of γ-Fe₂O₃/Ni₂O₃/FeCl₃(FeCl₂) Composite Nanoparticles by Hydrothermal Process Useful for Ferrofluids

Figure 2

XRD patterns of the precursor (a) and the processed sample in 0.25 M (b), 0.50 M (c), and 1.00 M (d) FeCl₂ solution, respectively.