Ganguli, A. K. ; Nagarajan, R. ; Nanjundaswamy, K. S. ; Rao, C. N. R. (1989) Superconductivity in Bi---Ca---Y---Sr---Cu---O (2122) and Tl---Ca---Y---Ba---Cu---O (1122) systems: effect of substitution of Ca by Y Materials Research Bulletin, 24 (1). pp. 103-109. ISSN 0025-5408
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/002554...
Related URL: http://dx.doi.org/10.1016/0025-5408(89)90015-9
Abstract
Effect of substitution of Ca by Y on the properties of TlCaBa2Cu2O7 (1122) and Bi2CaSr2Cu2O8+δ (2122) has been studied. Lattice parameters vary progressively with increase in Y concentration in both the systems. In TlCa1−xYxBa2Cu2O7+δ, compositions with x≤0.5 are superconducting. In Bi2Ca1−xYxSr2Cu2O8+δ, compositions with x<0.5 are superconducting; oxides of both these systems become semiconducting for higher values of x. In Bi-(Ca, Y, Sr)3 Cu2O8+δ, Tc decreases with the increasing Y/Ca ratio becoming zero at a finite value of the ratio.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Bismuth; Thallium; Calcium; Strontium; Barium; Yttrium; Copper; Oxides; Superconductors |
| ID Code: | 41872 |
| Deposited On: | 31 May 2011 12:17 |
| Last Modified: | 31 May 2011 12:17 |
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