In-situ synthesis of magnetic (NiFe2O4/CuO/FeO) nanocomposites

In-situ synthesis of magnetic nanocomposites with (NiFe2O4/CuO/FeO) crystal phases has been done using a sol–gel method by taking a non-stoichiometric composition of the precursors. The average particle size of the nanocomposites was calculated using X-ray diffraction (XRD) and high resolution tunneling electron microscope (HR-TEM) and it turns out to be ∼20 nm. The vibrating sample magnetometer (VSM) measurements demonstrate the ferromagnetic nature of the nanocomposites. The synthesized nanocomposite was used to prepare magnetic fluid using tetramethylammonium hydroxide as a surfactant and its stability in the solution was also discussed.