Observation by electron spin resonance of a pseudo-cubic site in YBa2Cu3O7-x.

F. Mehran, Stewart Barnes, T. R. McGuire, T. R. Dinger, D. L. Kaiser, F. Holtzberg

Research output: Contribution to journalArticle

38 Scopus citations


We report electron paramagnetic resonance experiments in single crystals of the high Tc superconductor YBa2Cu3O7-x. No EPR signal is observed in the spectra of the properly annealed crystals with Tc≅90K. However, we observe a strong, almost isotropic Cu2+ signal in the spectra of the as-grown (unannealed) single crystals with Tc≅40K. The observed signal has a slightly anisotropic g-factor which becomes totally isotropic at T≅90K. The linewidth, dominated by the hyperfine interaction, remains anisotropic at all temperatures, showing that the signal originates from a site which does not have real cubic symmetry.

Original languageEnglish (US)
Pages (from-to)299-302
Number of pages4
JournalSolid State Communications
Issue number3
StatePublished - 1988
Externally publishedYes


ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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