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Effect of iron doping and oxygen stoichiometry on infrared absorption in Y1Ba2Cu3O7−δ |
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| Authors: | A K Sood K Sankaran Y Hariharan S Vijayalakshmi V Sankara Sastry S Kalavathi J Janaki |
| Affiliation: | (1) Materials Science Laboratory, Indira Gandhi Centre for Atomic Research, 603 102 Kalpakkam, India;(2) Radiochemistry Programme, Indira Gandhi Centre for Atomic Research, 603 102 Kalpakkam, India;(3) Present address: Department of Physics, Indian Institute of Science, 560 012 Bangalore, India |
| Abstract: | We report infrared absorption of Y1Ba2Cu3O7−δ as a function of oxygen stoichiometry (0<δ<1) and copper substitution by iron in the spectral range of 450–700 cm−1. The strong bands associated with Cu-O vibrations undergo significant changes in their frequencies and intensities asδ is varied across the orthorhombic to tetragonal phase. These changes coupled with those arising as a result of doping with iron has helped in identifying the nature of the vibrational modes. |
| Keywords: | YBCO iron-doped YBCO oxygen stoichiometry superconductivity infrared absorption |
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