Vijayaraghavan, R. ; Rao, C. N. R. (1992) Superconducting properties of Tl1−yPbyCaSr2Cu2O7: role of Pb and oxygen stoichiometry Solid State Communications, 83 (1). pp. 73-76. ISSN 0038-1098
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/003810...
Related URL: http://dx.doi.org/10.1016/0038-1098(92)90016-3
Abstract
In the Tl1−yPbyCaSr2Cu2O7 system, monophasic superconducting compositions are formed in the range 0.25<y<0.60 and the minimum Pb content required to stabilize the tetragonal 1122 phase is about 25%. Maximum Tc is found when y=0.5, at which composition the hole concentration is optimal. Metallic compositions of Tl1−yPbyCaSr2Cu2O7 (y=0.25) and Tl0.75Pb0.25Y1−xCaxSr2Cu2O7 (0.80≤X≤1.0) become superconducting on decreasing the oxygen content by vacuum annealing.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 41886 |
| Deposited On: | 31 May 2011 12:32 |
| Last Modified: | 31 May 2011 12:32 |
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