Crystal growth and annealing experiments of the high Tc superconductor Bi2Sr2CaCu2O8 + δ
| Autor: | S.K.J. Lenczowski, Jhj Hans Dalderop, V.A.M. Brabers, J.H.P.M. Emmen |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
chemistry.chemical_classification
Superconductivity High-temperature superconductivity Annealing (metallurgy) Chemistry Analytical chemistry chemistry.chemical_element Crystal growth Condensed Matter Physics Oxygen law.invention Inorganic Chemistry law Materials Chemistry Limiting oxygen concentration Single crystal Inorganic compound Nuclear chemistry |
| Zdroj: | Journal of Crystal Growth. 118:477-482 |
| ISSN: | 0022-0248 |
| DOI: | 10.1016/0022-0248(92)90100-w |
| Popis: | Annealing experiments in an environment of 1 bar oxygen have been performed on large single crystals of Bi2Sr2CaCu2O8 + δ which are grown with a travelling solvent floating zone technique. The superconducting onset temperature Tc and the width of the Xac transition ΔTc, both indications for the distribution of the excess oxygen concentration δ, have been determined as a function of the annealing temperature Tann. Tc increases approximately linearly with Tann and has been tuned between 80 and 94 K. After annealing, very narrow transitions (0.5 < ΔTc < 1.5 K) are obtained, indicating the homogeneity of the crystals with regard to the oxygen concentration. |
| Databáze: | OpenAIRE |
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