Effect of heavy atom disorder on the intensities of powder XRD lines of YBa2Cu3O7-y |
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Authors: | V. S. Tiwari Sangeeta Chaudhry Dhananjai Pandey |
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Affiliation: | School of Materials Science and Technology, Banaras Hindu University , Varansi, 221005, India |
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Abstract: | Abstract It is shown that heavy atom disorder resulting from Y ? Ba, Ba ? Cu and Y ? Cu interchanges due to local stoichiometric constraints can cause significant changes in the intensities of X-ray powder diffraction lines of YBa2Cu3O7-y . A comparison of the theoretically predicted intensities with published patterns for specimens prepared by the conventional dry route reveals that Ba ? Cu interchanges involving copper atoms in the CuO2 planes can occur quite frequently and may be mistaken for (00l) texture. |
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Keywords: | Heavy atom disorder high T c superconductor YBa2Cu3O7-y |
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