Abstract
Nanocrystalline CoFe2O4 ferrite samples have been synthesized by co precipitation method. The prepared samples were irradiated by second harmonic diode pumped Nd:YAG laser with average power 150 m W of wavelength 532 nm for 5 min at a distance of 30 cm. The prepared samples were characterized to study the different properties of samples. X-ray diffraction analysis reveals a single-phase cubic spinel structure before/after irradiation. The broadening of the peaks indicates a reduction in crystallite size with ultra-fine nature for irradiated samples. EDAX analysis shows that the predictable composition present in the samples agrees well with the nominal compositions. Nd:YAG laser irradiation shows remarkable changes on structural as well as magnetic properties. The decreasing of the coercivity for the irradiated samples suggests that laser-irradiation and roughness can be used to tune the magnetic hardness of the ferrite materials.
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