Valence Study of Orthorhombic and Tetragonal Ba2YCu3Oy: The Role of Oxygen Vacancies in High-Tc Superconductivity
- 1 September 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (9A), L1561
- https://doi.org/10.1143/jjap.26.l1561
Abstract
The valency of Cu ions in the orthorhombic and tetragonal phases of high-T c superconductor Ba2YCu3O y (6.22<y1 sites on the z=1/2 plane is strongly correlated with the high-T c (90 K) superconductivity, while the Cu valency of Cu2 sites on the basal planes affects the low-T c (50-60 K) superconductivity of the orthorhombic phase.Keywords
This publication has 9 references indexed in Scilit:
- Evidence of Critical Oxygen Concentration at y=6.7∼6.8 for 90 K Superconductivity in Ba2YCu3OyJapanese Journal of Applied Physics, 1987
- Local Structure in Orthorhombie and Tetragonal Ba2YCu3O7-y: The Role of Oxygen Vacancies for High Tc SuperconductivityJapanese Journal of Applied Physics, 1987
- Characterization of Metamorphic Phases of Ba2YCu3O9-δJapanese Journal of Applied Physics, 1987
- Rietveld Refinement of the Structure of Ba2YCu3O7-x with Neutron Powder Diffraction DataJapanese Journal of Applied Physics, 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987
- Bulk superconductivity at 36 K inPhysical Review Letters, 1987
- Evidence for superconductivity above 40 K in the La-Ba-Cu-O compound systemPhysical Review Letters, 1987
- High TcSuperconductivity of La-Ba-Cu OxidesJapanese Journal of Applied Physics, 1987
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986