Enhanced magnetic properties of polymer-magnetic nanostructures synthesized by ultrasonication

Polymer based nickel (Ni) and cobalt (Co) co-doped ferrites were prepared by adept ultrasonication route. Different concentrations of polymer [polyvinyl alcohol (PVA)] (0.2 g and 0.5 g) was added as a surfactant to the magnetic particles. The phase purity of Ni-Co ferrites (spinel structure) was confirmed by X-ray diffraction (XRD). Enhanced saturation magnetization of polymer based magnetic nanoparticles due to shape anisotropy and size. 0.2 wt% doped ferrite showed superparamagnetic characteristics with blocking temperature above room temperature. Hence, ultrasonication route is a rapid and effective technique for tailoring size and morphology of magnetic nanostructure that could be useful in magnetic-sensor applications. [Display omitted] •Ultrasonication technique simple rapid and effective for polymer nanocomposites (NCs).•Nickel (Ni) and cobalt (Co) ferrites to Polymer NCs with Different Concentrations.•Polymer [polyvinyl alcohol (PVA)] (0.2 g and 0.5 g) added as a surfactant to ferrites materials.•Phase purity of Ni-Co ferrites (spinel structure) confirmed by Finger-print XRD, FTIR, Raman techniques.•Polymer NCs magnetic materials useful for future magnetic-sensor applications.