Lattice Stability of the Bi4(Sr1-yCay)6Cu4Ox Structure under the Change of Sr-Ca Ratio
- 1 November 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (11A), L2044-2047
- https://doi.org/10.1143/jjap.27.l2044
Abstract
The Ca composition y in the Bi4(Sr1-y Ca y )6Cu4O x (B-phase) was found to change from 0.24 to 0.61 as the initial composition of the mixture changed. By the heating of the mixture with y0.75, the Bi2(Sr, Ca)2CuO x (A-phase) was produced. The lattice parameter of the B-phase along the c-axis changed from 30.9 Å to 30.6 Å (Δ c/c=1.0%) depending on y, while the change of the lattice parameter along the a-axis was within 0.2%. It was pointed out that the agreement of the lattice parameter of the Cu-O and (Sr, Ca)-O planes was important to stabilize the perovskite structure composed by Cu, Sr, Ca and O.Keywords
This publication has 6 references indexed in Scilit:
- Assignment of the Powder X-Ray Diffraction Pattern of Superconductor Bi2(Sr, Ca)3-xCu2OyJapanese Journal of Applied Physics, 1988
- Electron diffraction and electron microscopy of the high Tc superconductive phase in the BiCaSrCuO systemSolid State Communications, 1988
- On the 110 K Superconductor in the Bi-Ca-Sr-Cu-O SystemJapanese Journal of Applied Physics, 1988
- Identification of the Superconducting Phase in the Bi-Ca-Sr-Cu-O SystemJapanese Journal of Applied Physics, 1988
- A New High-Tc Oxide Superconductor without a Rare Earth ElementJapanese Journal of Applied Physics, 1988
- Superconductivity in the Bi - Sr - Cu - O systemZeitschrift für Physik B Condensed Matter, 1987