The study of critical current density of superconducting thallium oxide films from spray-deposited precursors
| Autor: | Allen M. Hermann, Y. T. Wang, Raghu N. Bhattacharya, R. D. Blaugher |
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| Rok vydání: | 2001 |
| Předmět: |
Superconductivity
Argon Renewable Energy Sustainability and the Environment Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element Crucible Condensed Matter Physics Epitaxy Magnetic field Fuel Technology chemistry Thallium Deposition (phase transition) Thallium oxide Nuclear chemistry |
| Zdroj: | International Journal of Hydrogen Energy. 26:1289-1293 |
| ISSN: | 0360-3199 |
| Popis: | Spray deposition is a promising and economic approach for fabricating high-temperature superconducting films for the Tl-oxide superconductors. The Tl-oxides provide the potential for operation at 77 K in practical magnetic fields of 3– 5 T , which has been demonstrated by measurements on the irreversibility behavior of the Tl-1223 single layer compound with Bi and Sr substitution. In this report, we present the preparation and characterization of Tl0.78Bi0.22Sr1.6Ba0.4Ca2Cu3O9 superconducting films fabricated from spray-deposited Tl-free, Ag-containing and Cu-rich precursors and reacted with thallium vapor using a two-step crucible process at 650°C/815°C in flowing argon for only 10/10 min . An epitaxial superconducting film was synthesized successfully and critical current densities of 8×10 5 A / cm 2 at 77 K in zero-field were obtained with excellent in-field performance. |
| Databáze: | OpenAIRE |
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