Abstract

Meenakshi Bansal, Praveen Aghamkar and Dharamvir Singh Ahlawat

DOI : http://dx.doi.org/10.13005/ojc/3404045

Silica coated cobalt ferrite (CoFe₂O₄:SiO₂) nanocomposites were synthesized by co-precipitation technique using metal nitrates as precursors. The as-prepared sample has been further heat treated at 250°C, 500°C,750°C and 1000°C. Their structure and morphology related properties were desirably investigated by XRD, FTIR, TEM characterization techniques. Further, with the help of vibrating sample magnetometer (VSM) the magnetic properties have been successfully analysed. Furthermore, the structure and magnetism related properties of these nanocomposites are also understood with heating effects. With increasing calcinations temperature, crystallite size of CoFe₂O₄:SiO₂ nanocomposites was also found to increase. The room temperature magnetic measurements have shown a strong relation of saturation magnetization, retentivity and coercivity with annealing temperature.

Annealing Temperature; CoFe2O4:SiO2 Nanocomposites; Co-Precipitation; Magnetic; Structural

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