Kunal B. Modi, Suraj J. Shah, Chetan R. Kathad, Pooja U. Sharma, Pre and Post Effect of Swift Heavy Ion Irradiation on Infrared Spectral Evolution of Y3+xFe5-xO12 (x = 0.0 - 1.0) System, ILCPA Volume 44, International Letters of Chemistry, Physics and Astronomy (Volume 44)
    Present work aims to investigate the effect of Y<sup>3+</sup> - substitution and 50 MeV, Li<sup>3+</sup> ion irradiation (fluence: 5 x 10<sup>13</sup> ions/cm<sup>2</sup>) on infrared spectral evolution of Y<sub>3+</sub><i><sub>x</sub></i>Fe<sub>5-</sub><i><sub>x</sub></i>O<sub>12</sub> (<i>x</i> = 0.0, 0.2 0.4, 0.6, 0.8 and 1.0) garnet system. Infrared absorption spectra for <i>x</i> = 0.0 – 0.6 compositions show three absorption bands while <i>x</i> = 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 Y<sup>3+</sup> - substitution. The intensity of absorption bands for <i>x</i> = 0.0 – 0.4 compositions is found to increase, while for <i>x</i> = 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 YFeO<sub>3</sub> phase and change in structural parameters. It seems that YFeO<sub>3</sub> phase is irradiation hard phase.
    IR Spectroscopy, Swift Heavy Ion Irradiation, Yttrium Iron Garnet