Phase stability of the mixed rare-earth yttrium/erbium and yttrium/ytterbium barium cuprates, RE0.5 RE′0.5 Ba2Cu3O 7-x (RE = rare-earth ), and 'YBa2Cu3O7-x (YBCO) + BaF2'

J. L. MacManus-Driscoll, J. A.G. Nelstrop, A. Berenov, X. Qi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A thermodynamic study of the phase stability of the mixed rare-earth barium cuprates, RE0.5RE′0.5Ba2Cu3O7-x (RE/RE′BCO, RE = Y, RE′ = Er, Yb) and 'YBCO + 25 wt.% BaF2' was carried out over the temperature range 800-960 °C and pO2 range 3.0 × 10-4 to 2.1 × 10-1 atm O2, using a coulometric titration technique. At temperatures, T, less than the peritectic temperature, Tp, the phase stabilities of the mixed rare-earth compounds lie between the two single rare-earth parent systems. However, at T > Tp the phase stabilities of the mixed rare-earth compounds depend on the solubilities of the rare-earths in the melt. The stability of 'YBCO + BaF2' is reduced compared to pure YBCO and is very close to pure ErBa2Cu3O7-x (ErBCO).

Original languageEnglish
Pages (from-to)507-513
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume384
Issue number4
DOIs
Publication statusPublished - 2003 Feb 15

All Science Journal Classification (ASJC) codes

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

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