Effect of Sr and Co doping on structure and phonon raman spectra of YBa2Cu3O7-d

Masato Kakihana, Lars Börjesson, Sten Eriksson

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of cosubstitution of Sr for Ba and Co for Cu in the superconductor YBa2-ySryCu3-xCoxO7-d on Raman spectra and relevant bond distances deduced with neutron diffraction measurements has been investigated. Specifically the 0(4) stretching 500 cm-1 Raman frequency shifts, on the one hand, upward upon Sr doping, on the other hand downward upon Co doping. The net effect is interpreted by a weakening of the net force constant for the O(4) atom involving both the Cu(1)-O(4) and Cu(2)-O(4) bonds, and the O(4) stretching vibration is found to systematically change with the Cu(1)-Cu(2) bond distance. A brief discussion is made on the relationship between Tc and the structural changes induced by the dopants.

Original languageEnglish
Pages (from-to)1247-1248
Number of pages2
JournalPhysica B: Condensed Matter
Volume165-166
DOIs
Publication statusPublished - 1990 Jan 1
Externally publishedYes

ASJC Scopus subject areas

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

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