Residual surface stress measurements in YBa2Cu3Ox superconductors |
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| Authors: | Kh.A. Ziq S.N. Alfaer |
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| Affiliation: | a Physics Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
b Faculty of Engineering and Applied Science, S.J. Carew Building, 4019-300 Arctic Avenue, Memorial University of Newfoundland, St. John's, NF, Canada A1B 3X5 |
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| Abstract: | XRD and residual surface stress (sin2 ψ) measurements were carried out on YBa2Cu3Ox superconductors with varying oxygen stoichiometry (6.3 < x < 7.0). Slopes of the surface strain versus sin2 ψ were plotted against oxygen content for certain reflections. Compressional surface stress has been found along the c-axis, while a tensile surface stress has been observed along the ab-plane. Both surface stresses were found to vary slightly with oxygen content. These findings qualitatively agree with a very small hydrostatic pressure effect on Tc for fully oxygenated YBa2Cu3Ox (x = 7) compared to oxygen deficient material at the surface. |
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| Keywords: | 61.10.&minus i 61.10.Yh |
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