Oxygen-vacancy ordering and microstructure in annealed YBa2Cu3O7-δ superconductors

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

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105 Scopus citations


We present the results of a systematic electron diffraction study of short-range oxygen-vacancy ordering in ceramic YBa2Cu3O7-δ superconductors with 0.08≤δ≤0.67, prepared by a Zr-getter technique. In addition to the two types of orderings with reduced wave vectors ((1/2,0,0) and ((2/5,0,0), a new vacancy ordering with reduced wave vector((1/3,0,0) has been found. We have observed in samples with δ=0.5 a vacancy ordering with a large correlation length (∼150 A) in the c-axis direction. We have also observed a tweedlike microstructure at δ=0.61, which is caused by a high density of microtwins.

Original languageEnglish (US)
Pages (from-to)5130-5133
Number of pages4
JournalPhysical Review B
Issue number7
StatePublished - 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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