High-temperature superconductivity in the multiphase compound system Y-Ba-Cu-O
- 1 May 1987
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 17 (5), L91-L96
- https://doi.org/10.1088/0305-4608/17/5/004
Abstract
The measurement of AC and DC magnetic susceptibilities, DC electrical resistance and magnetic hysteresis confirms the existence of a superconducting phase transition well above 77 K in the compound system Y1.2Ba0.8CuO4. The method of preparation followed yields a zero-resistance temperature of 87 K and a deviation from high-temperature linear electrical resistance behaviour at 140 K in the system Y-Ba-Cu-O. These values are, to the authors' knowledge, the highest ever reported in any stable superconducting compound. The width of the transition is also very narrow ( approximately 2K) in the specimens. The sensitivity of these materials to different heat treatments is described.Keywords
This publication has 8 references indexed in Scilit:
- Superconductivity in the compound system La-Ca(Sr)-Cu-OJournal of Physics F: Metal Physics, 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987
- High-pressure study of the new Y-Ba-Cu-O superconducting compound systemPhysical Review Letters, 1987
- Susceptibility Measurements Support High- T c Superconductivity in the Ba-La-Cu-O SystemEurophysics 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
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986
- High temperature superconductivity in the LiTiO ternary systemMaterials Research Bulletin, 1973