| Autor: |
Rudolf P. Huebener, L. Kan, R. Kiemel, M. Schlichenmaier, H.R. Khan, S. Kemmler-Sack, S. Lösch, Ch.J. Raub, S. Döttinger, A. Ehmann, W. Schäfer, C. Schöll, W. Forkel, B. Elschner, K. Hipler, Rudolf Gross |
| Rok vydání: |
1989 |
| Předmět: |
|
| Zdroj: |
Journal of the Less Common Metals. 151:55-61 |
| ISSN: |
0022-5088 |
| DOI: |
10.1016/0022-5088(89)90296-8 |
| Popis: |
The physical properties and stability of the high Tc members of the series Bi2Sr2Can − 1CunO2n + 4 are strongly influenced by the substitution of lead for bismuth (system Bi2 − xPbxSr2Can − 1CunO2n + 4 + z). For n = 2 (Bi2 − xPbxSr2CaCu 2O8 + z) a continuous series is formed with 0 ⩽ x $ 0.75. Reduction of the oxygen content by argon treatment yields, for x = 0.25 and 0.5, an increase in Tc from approximately 70 K (air preparation) to approximately 90 K; the amount of superconducting phase in the 90 K compound is approximately 40%. Nearly pure members of the n = 3 series (Bi2 − xPbxSr2Ca2Cu3O10 + z) are formed for x = 0.25 and 0.5 with Tc between approximately 100 and 110 K. For x = 0.5 the amount of superconducting phase is approximately 35%. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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