EPR in Gd-doped YBa2Cu3O6+y (0≤y≤1): local method to determine oxygen ordering

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The Gd3+9GHz EPR spectra of a series of 10 magnetic field oriented Y0.999Gd0.001Ba2Cu3O6+y (0≤y ≤1) compounds show 7 well resolved fine structure sets corresponding to various configurations of oxygen in the Cu(1) planes. The oxygen contents are confirmed by X-ray diffraction lattice constants. The data suggest that for y≥0.3 oxygen on the O(1) sites forms alternating occupied and vacant chains. The chains themselves are at least partially ordered. The relation between oxygen order at intermediate y and the superconducting transition temperature is briefly discussed.

Original languageEnglish
Pages (from-to)457-464
Number of pages8
JournalPhysica C: Superconductivity and its applications
Issue number5-6
Publication statusPublished - Nov 15 1990

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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