Synthesis, Characterization and Magnetic Properties of Mn2+ Doped Cdga2-2xo4 Oxide Spinels
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 6
Abstract
Mn2+ doped CdGa2-2xO4 oxide spinels with ‘x’ values ranging from 0.15, 0.30, 0.45, and 0.60 were synthesized by sol – gel method via nitrate citrate route. X-ray powder diffraction analysis confirms the presence of cubic structure with lattice parameters 8.5856, 8.6200, 8.6266 and 8.6469 Å for respective values of ‘x’, having space group Pm-3m. Average crystallite size values are determined by Scherrer’s relation, which are found to be in the range of 26 to 59 nm. Cell volume increases with increase in Mn2+ concentration which confirms the successful incorporation of bigger size Mn2+ in the host Ga3+ ion. VSM results confirm weak ferromagnetic behaviour of prepared samples with low values of coercivity, retentivity and magnetic saturation at room temperature. TGA-DSC results reveal no phase transition in the range 100 – 800C. Absorption spectroscopy plays an important role in determining the optical property of spinels. Optical properties of synthesized oxide are studied by using UV–Vis absorption spectroscopy. FT-IR spectra of the sample are recorded at room temperature in the range 4000 – 400 cm-1 which show characteristic absorption at 604 cm-1 and 473 cm-1. Morphology of the samples shows particles are agglomerated having void space. Elemental analysis by EDX confirms the presence of individual element in the expected range. EPR spectra were recorded in X- band spectrometer at room temperature and 5 K, 94 K which are found to be isotropic in nature.
Authors and Affiliations
K. Chandru, G. Selvanathan, B. B. Das
Keywords
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