Thomas, K. A. ; Varadaraju, U. V. ; Subba Rao, G. V. ; Tomy, C. V. ; Malik, S. K. (1990) Superconductivity studies on the M---Tl---Sr---Ca---Cu---O (M = Rate Earth, Sc, Y, Pb, Bi, Th) system Materials Research Bulletin, 25 (4). pp. 465-476. ISSN 0025-5408
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0025-5408(90)90182-2
Abstract
Studies on MTl2 Sr2 Ca2 Cu3 Oy (M = Rare Earth, Y, Sc, Pb, Bi and Th) show that superconductivity in the range 40-77K can be achieved in this system depending on the M-ion. The minimum amount of rare earth required to show a Tc ~ 70K appears to be 25 mole percent. X-ray studies confirm the single phase material responsible for high Tc superconductivity to be 1212 type. It appears that Pb, Bi and Th substitute at the Tl- site whereas the rare earths, Y and Sc prefer the Ca− site.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Thallium; Calcium; Strontium; Rare Earths; Thorium; Copper; Oxides; Superconductors |
| ID Code: | 52028 |
| Deposited On: | 02 Aug 2011 08:13 |
| Last Modified: | 02 Aug 2011 08:13 |
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