Superconductivity in Tl1−xCdxBaLaCuO5

Subramanian, M. A. ; Ganguli, A. K. (1991) Superconductivity in Tl1−xCdxBaLaCuO5 Materials Research Bulletin, 26 (1). pp. 91-95. ISSN 0025-5408

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Cadmium substituted thallium cuprates of the type Tl1−xCdxBaLaCuO5 (R = La and Nd) have been synthesized for various values of x. A single phase region exists for x = 0 to 0.4. Superconductivity was observed over the region 0.2 ≤ x ≤ 0.4 with transition temperatures in the range 38-48 K. X-ray diffraction data suggest that cadmium substitutes for thallium, thereby increasing the number of holes in the Cu---O dx2y2*) conduction band. A plot of Tc versus x showed a maximum when the formal oxidation state of copper is close to 2.3 as observed in other superconducting copper oxide systems.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Superconductors; Thallium; Strontium; Cadmium; Copper
ID Code:62033
Deposited On:16 Sep 2011 03:44
Last Modified:16 Sep 2011 03:44

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