Synthesis of Dy doped Co–Zn ferrite by sol–gel auto combustion method and its characterization

Dysprosium doped Co–Zn ferrites were synthesized by sol–gel auto combustion method. These synthesized compounds were characterized by using XRD, SEM, FTIR, EDS, TGA-DTA and TEM. TGA weight loss in the region of 100–200 °C and this loss is due to autocatalytic oxidation reduction reactions of nitrates with glycine. The composition Co0.5Zn0.5Fe2−xDyxO4 (x=0.075) shows fibrous reticulated mesh like morphology. The average grain size increases with increasing the Dy content in the Co–Zn ferrite. The XRD study of Dy doped Co–Zn ferrite shows in Cubic spinel phase. Particle size obtained from TEM analysis was found to be 30–40 nm. The FTIR spectra showed the characteristic of two strong absorption bands at 560 cm−1 corresponds to intrinsic stretching vibrations of the metal at the tetrahedral site and lowest band is observed at 455 cm−1 corresponds to octahedral site.

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