Diffraction evidence for oxygen-vacancy ordering in annealed Ba2YCu3O7- (0.30.4) superconductors

D. J. Werder, C. H. Chen, R. J. Cava, B. Batlogg

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Diffuse streaks centered at q=(0,(2/5,0) and (0,(1/2,0) have been observed in annealed Ba2YCu3O7- with 0.30.4, which has a Tc of 60 K and a Meissner effect equivalent to the 90 K phase. We interpret the presence of the diffuse streaking as a result of short-range oxygen vacancy ordering. The vacancy ordering has a short correlation length along the copper-oxygen chains (b direction) and a long correlation length perpendicular to the chains along the a direction. The ordered structure is completely uncorrelated parallel to the c axis.

Original languageEnglish (US)
Pages (from-to)2317-2319
Number of pages3
JournalPhysical Review B
Issue number4
StatePublished - 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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