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1 International Letters of Chemistry, Physics and Astronomy

1 2015

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Pre and Post Effect of Swift Heavy Ion Irradiation on Infrared Spectral Evolution of Y3+xFe5-xO12 (x = 0.0 – 1.0) System

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Modi K. B. , Shah S. J. , Kathad C. R. , Sharma P. U.

International Letters of Chemistry, Physics and Astronomy

2015

tom Vol. 44

66--72

Present work aims to investigate the effect of Y3+ - substitution and 50 MeV, Li3+ ion irradiation (fluence: 5 x 1013 ions/cm2) on infrared spectral evolution of Y3+xFe5-xO12 (x = 0.0, 0.2 0.4, 0.6, 0.8 and 1.0) garnet system. Infrared absorption spectra for x = 0.0 – 0.6 compositions show three absorption bands while x = 0.8 – 1.0 compositions are characterized by two absorption bands, identical with IR spectra of rare earth ortho ferrites. The position and intensity of bands are found to be influenced by Y3+ - substitution. The intensity of absorption bands for x = 0.0 – 0.4 compositions is found to increase, while for x = 0.6 – 1.0 compositions no effect of swift heavy ion irradiation has been observed. The results have been explain in the light of SHII induced defect states, partial removal of un-wanted YFeO3 phase and change in structural parameters. It seems that YFeO3 phase is irradiation hard phase.