Angewandte Chemie International Edition in English · 1987 · 33 citations · 6 references
Superconducting MaterialEngineeringBismuth-based SuperconductorsChemistrySuperconducting PropertiesNovel SuperconductorsTopotactic Oxygen IntercalationSuperconductivityQuantum MaterialsHigh Tc SuperconductorsCu 3Low-temperature SuperconductivityMaterials ScienceHigh-tc SuperconductivityPhysicsHigh MobilityNiobium-based SuperconductorsHigh-temperature SuperconductivityNatural SciencesCondensed Matter PhysicsApplied PhysicsTopotactic Redox Reactions
The critical temperature of the phase transition normal conductivity/superconductivity can be controlled continuously and reversibly between 93 K and 30 K for the high‐temperature superconductor YBa 2 Cu 3 O 7 over a nonstoichiometric range Yba 2 Cu 3 O x (7 ≥ x ≥ 6.5) by means of topotactic oxygen intercalation and deintercalation. Hydrogen and lithium can also be inserted into the lattice of the superconductor at low temperatures. 7 Li‐NMR investigations revealed a high mobility of the Li ions at room temperature.
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Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure
Meiying Wu, J. R. Ashburn, C. J. Torng et al. · Physical Review Letters · 1987 · 7.1K citations · Full text
Oxygen stoichiometry in Ba2YCu3Ox
P.K. Gallagher, H. M. O’Bryan, S. A. Sunshine et al. · Materials Research Bulletin · 1987 · 427 citations
Variations of stoichiometry and cell symmetry in YBa2Cu3O7−x with temperature and oxygen pressure
P. Strobel, J.J. Capponi, M. Marezio et al. · Nature · 1987 · 145 citations