Observation and identification of a 107 K superconducting family in the CaBa2Ca2Cu3O9-δ system

N. L. Wu, Z. L. Du, Y. Y. Xue, I. Rusakova, D. K. Ross, L. Gao, Y. Cao, Y. Y. Sun, C. W. Chu, M. Hervieu, B. Raveau

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A new family of C-free high-temperature superconducting oxides in the Ba-Ca-Cu-O system showing a Tc up to 107 K has been synthesized under high pressure. Structural analyses, based on X-ray and electron diffractions and high resolution electron microscopy, have revealed that these oxides can be represented by CaBa2Ca2Cu3O9-δ [Ca-1223-Ba] with a tetragonal subcell that has lattice constants α approximately 3.85 angstroms and c approximately 16.5 angstroms and is isostructural to Tl-1223-Ba with the Tl sites occupied mainly by Ca. These oxides have the same active block of [(CuO2)(Ca)(CuO2)(Ca)(CuO2)] but with cation mixing and substitution of Ca by Cu within the charge reservoir block [(BaO)(CaO)(BaO)]. This results in the observed variations in composition and superstructure but has only minor influence on Tc.

Original languageEnglish
Pages (from-to)227-234
Number of pages8
JournalPhysica C: Superconductivity and its applications
Issue number3
Publication statusPublished - 1999 Apr 20

All Science Journal Classification (ASJC) codes

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


Dive into the research topics of 'Observation and identification of a 107 K superconducting family in the CaBa2Ca2Cu3O9-δ system'. Together they form a unique fingerprint.

Cite this