EPR in YBa2Cu3O7-δ and YBa2Cu3O6+x

F. J. Owens, B. L. Ramakrishna, Z. Iqbal

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Abstract

Electron paramagnetic resonance (EPR) measurements on polycrystalline YBa2Cu3O7-δ prepared via the citrates and the usual ceramic route of firing the oxides and BaCO3 are reported. The single phase samples of orthorthombic YBa2Bu3O6.9 and tetragonal YBa2Cu3O6 obtained from a citrate precursor do not exhibit an EPR signal. However, a sample of the tetragonal and non-superconducting YBa2Cu3O6.15 prepared from a master sample of citrate-route synthesized YBa2Cu3O6.9 displays an EPR signal whose intensity peaks near 460 K in agreement with neutron diffraction data that show an antiferromagnetic transition in the 400 to 500 K temperature range. A probable explanation for these results is discussed.

Original languageEnglish (US)
Pages (from-to)221-224
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume156
Issue number2
DOIs
StatePublished - Sep 1 1988

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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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