Structure and composition of the 115 K superconducting phase in the Bi-Ca-Sr-Cu-O system
- 8 August 1988
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 53 (6) , 520-522
- https://doi.org/10.1063/1.100623
Abstract
Results of convergent beam electron diffraction and energy dispersive x‐ray (EDX) microanalysis of Bi1.2Ca0.9Sr0.9Cu2Oy superconductor are reported. The structure is orthorhombic with a=5.63 Å, b=5.4 Å, and c=38.2 Å. The c parameter is different from those reported by other workers and suggests that two extra perovskite units ap, where ap=3.82 Å, have been introduced leading to c=10ap. EDX microanalysis shows that the Cu content of this phase is higher than that reported by other workers. It is suggested that the phase with c=38.2 Å may be the higher temperature (115 K) superconductor.Keywords
This publication has 6 references indexed in Scilit:
- Superconductivity in the Bi-Sr-Ca-Cu-O compounds with noble metal additionsApplied Physics Letters, 1988
- Electron microscopy on the Tc = 110 K (midpoint) phase in the system Bi2O3–SrO–CaO–CuONature, 1988
- Superconductivity in the high-Bi-Ca-Sr-Cu-O system: Phase identificationPhysical Review Letters, 1988
- A New High-Temperature Superconductor: Bi 2 Sr 3-x Ca x Cu 2 O 8+yScience, 1988
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986