New phases in the YBa(SR)Cu and BiSR, CACU oxides

Z. Iqbal, J. Barry, B. L. Ramakrishna, F. Reidinger, A. Bose, H. Eckhardt

Research output: Contribution to journalArticle


The superconducting properties and structure of Y(Ba2-xYx)Cu3O7+δ and Bi2 Sr2-x Cax Cu2O7+δ are described. In the former material the Ba sites in the YBa2Cu3O7 structure is doped by the smaller sized Y3+ ion to give a non-superconducting phase. Similar doping by Sr2+ ions can also be achieved to give a structure which shows a broadened bulk superconducting transition with Tc = 85K. When the Ba:Sr ratio is 1:1 a resistive anomaly is observed near ∼200K. The Bi -superconductor becomes superconducting near 90K with a resistive and diamagnetic transition at 112K. The structure of the ordered phase of the Bi superconductor has been obtained by high resolution electron microscope imaging and electron diffraction.

Original languageEnglish (US)
Pages (from-to)395-396
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 1
Publication statusPublished - 1988


ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Iqbal, Z., Barry, J., Ramakrishna, B. L., Reidinger, F., Bose, A., & Eckhardt, H. (1988). New phases in the YBa(SR)Cu and BiSR, CACU oxides. Physica C: Superconductivity and its Applications, 153-155(PART 1), 395-396.