▎ 摘　　要

Nickel-substituted cobalt ferrite-reduced graphene oxide (NCF-RGO) composite was synthesized using a facile one-pot chemical coprecipitation method. The addition of graphene oxide (GO) leads to the decrease in the size of NCF nanoparticles (< 10 nm) present in the nanocomposite, which plays role in controlling their magnetic and dielectric properties. Nickel with a lower ionic radius compared to cobalt, and its substitution in the composite along with the incorporation of GO, exhibits superparamagnetic properties in the blend. A large magnetization of 51.63 emu/g and a high dielectric constant of 3.92 x 10(6) (at 100 Hz) were also determined for the nanocomposite. High charge-storing capability and tunable magnetization have been developed in this work. Thus the NCF-RGO nanocomposite finds potential application in flexible magnetic storage devices. [GRAPHICS]