Oxidizing-reducing effects in yttrium doped Bi2Sr2CaCu2O8+δ (Bi-2212) superconductor
| Autor: | André Perrin, E. Laxmi Narsaiah, Marcel Sergent, U. V. Subba Rao, Octavio Peña |
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| Rok vydání: | 1992 |
| Předmět: |
Controlled atmosphere
Materials science Annealing (metallurgy) Mechanical Engineering Analytical chemistry chemistry.chemical_element Yttrium Condensed Matter Physics Copper Magnetic susceptibility chemistry Mechanics of Materials Oxidation state Oxidizing agent General Materials Science Crystallite Nuclear chemistry |
| Zdroj: | Materials Science and Engineering: B. 15:40-43 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/0921-5107(92)90027-7 |
| Popis: | A polycrystalline sample of Bi2Sr2Ca0.8Y0.2Cu2O8+δ was prepared by a solid state reaction method. The effect of annealing temperatures on Tc both in oxygen flow and secondary vacuum were investigated using a.c. susceptibility measurements. The onset of Tc increases from 60 K to 82 K as a result of oxygen annealing. The results obtained are explained on the basis of a small change in oxygen content and/or average oxidation state of copper. |
| Databáze: | OpenAIRE |
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