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SODIUM -COBALT FERRITE NANOSTRUCTURE STUDY: SOL-GEL SYNTHESIS, CHARACTERIZATION, AND MAGNETIC PROPERTIES

The citrate sol gel reactions occurring in sodium co-doped cobalt ferrite nanoparticles (CFO NPs) with the chemical composition NaxCo(1-x)Fe2O4 (where x = 0.25, 0.5, 0.75) were synthesized and calcinated at 800 o C for 3h. The crystalline phase and morphological analyses were investigated by using X-ray diffraction (XRD), high resolution scanning and transmission electron microscopy (HRSEM/HRTEM), Fourier transform infrared spectrometer (FT-IR) and vibrating sample magnetometer (VSM). The X-ray diffraction (XRD) pattern confirms a single phase cubic structure of pure and doped (CFO NPs). HRSEM and HRTEM results reveal that the prepared nanomagnetic are wall porous structures and spherical particles. The coercivity (Hci) varies from 1272.0 Oe to 625.93 Oe and the saturation magnetization (Ms) ranges between 81.84 emu/g to 33.06 emu/g. The obtained results indicate that the citrate sol gel process is effective, low-cost and environment-friendly and play an important role in the synthesis, morphology, crystalline structure and magnetic property of spinel Na-CoFe2O4 nanostructure.