Infrared absorption spectroscopic study of Cu2+ substituted NiZn ferrites

Ni-Cu-Zn ferrites with general formula Ni0.52Cux/2Zn0.5-x/2Fe2O4 (with x = 0.3, 0.4, 0.5 and 0.6) have been synthesized using oxalate precursor method with different precursor reaction temperatures in the range 10oC to 70oC. The structural analysis has been carried out using Xray diffraction and IR absorption studies which reveal the formation of ferrite structure. Far infrared absorption spectra show two significant absorption bands, first at about 550cm-1 and second at about 415 cm-1, which were respectively attributed to tetrahedral (A) and octahedral (B) sites of the spinel. The position of bands, are found to be composition dependent. The force constants Kt and Ko, were calculated as a function of Zn2+ concentration. Compositional dependence of force constants is explained on the basis of cation distribution and magnetic moment.

Author(s): N. S. Shinde 1, S. S. Khot1, B. P. Ladgaonkar2, B. B. Kale3, S. Apte3, P. M. Tamhankar4 and S. C. Watawe4

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