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The magnetic Ni 0.3  Zn 0.7  Fe 2  O 4  nanoparticles were expected to have wide applications in bionanoscience and electronic devices technology. In this work, Ni 0.3  Zn 0.7  Fe 2  O 4  nanoparticles were synthesized successfully by a redox chemical reaction in an aqueous solution of nickel chloride, zinc chloride and ferric chloride. Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the shape, structure and size of the synthesized magnetic nanoparticles. The magnetic properties of Ni 0.3  Zn 0.7  Fe 2  O 4  nanoparticles were studied using a vibrating sample magnetometer (VSM). The XRD patterns of the synthesized nanoparticles revealed the formation of the single phase spinel structure of the synthesized materials. The synthesized Ni 0.3  Zn 0.7  Fe 2  O 4  nanoparticles were used for the preparation of Ni 0.3  Zn 0.7  Fe 2  O 4 /polyvinyl acetate (PVAC) nanocomposites by an  in situ  emulsion polymerization method. The synthesized Ni 0.3  Zn 0.7  Fe 2  O 4  nanoparticles exhibited superparamagnetic behavior at the room temperature under an applied magnetic field. Magnetization measurements indicated that the saturation magnetization of synthesized Ni 0.3  Zn 0.7  Fe 2  O 4 /PVAc nanocomposites was markedly less than that of Ni 0.3  Zn 0.7  Fe 2  O 4  magnetic nanoparticles.

Synthesis and characterization of magnetic Ni 0.3 Zn 0.7 Fe 2 O 4 /polyvinyl acetate (PVAC) nanocomposite