Liu, H. B. ; Morris, D. E. ; Sinha, A. P. B. ; Tang, X. X. (1991) Superconductivity in La2-xSrxCaCu2O6 at 60 K: investigation of doping and high pressure annealing Physica C: Superconductivity, 174 (1-3). pp. 28-32. ISSN 0921-4534
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0921-4534(91)90417-W
Abstract
A systematic investigation of the effect of oxygen pressure during annealing and of varying Sr content on the structural and superconducting properties of La2-xSrxCaCu2O6 has been carried out. To get the highest Tc of 60 K, the required annealing pressure was 200 bar of oxygen at 970° C. This Tc=60 K sample has FACV ~2.17 and an oxygen content of 6.02-6.05 per formula unit. Although many variations in the preparation conditions were tried, the 60 K superconductor was always found to be associated with an impurity phase La(8-xSrxCu8O20. The amount of this impurity phase increased with increasing Sr content and with increasing oxygen pressure.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 48941 |
| Deposited On: | 18 Jul 2011 10:21 |
| Last Modified: | 18 Jul 2011 10:21 |
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