Subsolidus phase relationships and superconductivity in the Gd2O3-BaO-CuO system
- 14 October 1987
- journal article
- letter
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 20 (10) , 1324-1326
- https://doi.org/10.1088/0022-3727/20/10/019
Abstract
The 960 degrees C subsolidus phase relationships in the Gd2O3-BaO-CuO system were determined by means of X-ray diffraction as well as superconductive properties measurements. In the measured partial diagram, two ternary compounds occur: GdBa2Cu3O7-y and Gd2BaCuO5. GdBa2Cu3O7-y has an orthorhombic distorted perovskite structure with a=3.909 AA, b=3.847 AA and c=11.682 AA. It has a high-Tc superconductive phase with a zero resistivity transition temperature of 94.5 K. Gd2BaCuO5 also has an orthorhombic structure with a=7.225 AA, b=12.316 AA and c=5.722 AA. The possible space group is either Pbbm or Pbn2. Only the compound GdBa2Cu3O7-y is superconducting under the condition employed. The relationships between composition and superconductivity are also reported.Keywords
This publication has 6 references indexed in Scilit:
- Crystal structure and superconductivity of BaGdCuO systemSolid State Communications, 1987
- Phase diagram and superconductivity in the Y-Ba-Cu-O systemApplied Physics Letters, 1987
- Superconductivity above 90 K in the square-planar compound system A with A=Y, La, Nd, Sm, Eu, Gd, Ho, Er and LuPhysical Review Letters, 1987
- Superconducting and Structural Properties of the New Ba1-xLnxCuO3-y Compound System (Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Yb)Japanese Journal of Applied Physics, 1987
- 位错心线性膨胀模型的正电子湮没特性Chinese Science Bulletin, 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987