25 September 1995 Direct observation of microscopic inhomogeneities in high-Tc superconductors using energy-dispersive diffraction of synchrotron-produced xrays
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Abstract
Evidence of micron-sized structural inhomogeneities in several high transition temperature (Tc) superconductors is presented. By illuminating samples with high energy, highly collimated x rays produced on a synchrotron wiggler, small changes in the lattice were detected over a spatial scale as small as 10 micrometer. In the YBa2Cu3O7-(delta ) crystals, these changes are interpreted as evidence of variations in the oxygen content and in the Nd2-xCexCuO4-y crystal, as a variation in the cerium content. Each type of inhomogeneity can affect the superconducting properties.
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Earl F. Skelton, Earl F. Skelton, Syen B. Qadri, Syen B. Qadri, Michael S. Osofsky, Michael S. Osofsky, A. R. Drews, A. R. Drews, P. R. Broussard, P. R. Broussard, J. Z. Hu, J. Z. Hu, L. W. Finger, L. W. Finger, Terrell A. Vanderah, Terrell A. Vanderah, D. Kaiser, D. Kaiser, J. L. Peng, J. L. Peng, Steven M. Anlage, Steven M. Anlage, Richard L. Greene, Richard L. Greene, John Giapintzakis, John Giapintzakis, "Direct observation of microscopic inhomogeneities in high-Tc superconductors using energy-dispersive diffraction of synchrotron-produced xrays", Proc. SPIE 2516, X-Ray Microbeam Technology and Applications, (25 September 1995); doi: 10.1117/12.221669; https://doi.org/10.1117/12.221669
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