Oxygen induced phase changes in YBa2Cu3O6+δ. transport, structural and spectroscopic evidence

H. Kuzmany, M. Kuzmany, E. Faulques, S. Pekker, G. Y. Hutiray, Zsoldos, L. Mihàly

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4 Citations (Scopus)


YBa2Cu3O6+δwas prepared for various values of δ by equilibrating pieces of fully oxidized orthorhombic and fully reduced tetragonal material at 600°C.T cwas found to decrease rapidly with decreasing δ and reached zero comptely wihin the orthorhombic phase. Strong changes in frequency and intensity of Raman and IR spectra were observed and could be correlated to the structural changes. In particular two IR-active modes at 580cm-1and at 630cm-1were observed which allowed to observe directly the doping process by the O(1)-oxygen. Also, the ratio of two special Raman lines was found to be a critical function of the oxygen concentration. From the experiments an assignmnt of vibrational modes was obtained in very good agreement with a recent normal coordinate calculation.

Original languageEnglish
Pages (from-to)82-87
Number of pages6
JournalPhysica Scripta
Issue numberT25
Publication statusPublished - Jan 1 1989

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mathematical Physics
  • Atomic and Molecular Physics, and Optics

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