Tailoring magnetic properties of CoNi-Ferrite/SiO2 nanocomposite

A series of CoNi-Ferrite/SiO 2 Nanocomposite with diluted magnetic properties is synthesized using a modified self-combustion approach. Comprehensive structural characterization, including X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FESEM), reveals a ferrite-SiO 2 interface. XRD analysis confirms the presence of both crystalline ferrite and amorphous SiO 2 phases, while FESEM images show uniform particle distribution and morphology. The incorporation of SiO 2 into the CoNi-Ferrite matrix creates a phase interface, leading to a linear decrease in saturation magnetization and magnetic remanence with increasing SiO 2 content, due to diluted magnetic interactions and the non-magnetic SiO₂ barrier controls inter-particle distance and surface spin effects. Raman intensity decreases with increasing SiO 2 content is due to non-magnetic SiO 2 dilution. The modified solution self-combustion method offers a scalable and cost-effective route for producing these nanocomposites. These findings have significant implications for developing magnetic materials with controlled properties for emerging technologies, including magnetic storage and magnetic sensors.