Synthesis and characterization of (Tl0.5Pb0.5)Sr3−xNdxCu2O7 (0.5≤× ≤0.9)

Ganguli, A. K. ; Subramanian, M. A. (1991) Synthesis and characterization of (Tl0.5Pb0.5)Sr3−xNdxCu2O7 (0.5≤× ≤0.9) Materials Research Bulletin, 26 (6). pp. 449-453. ISSN 0025-5408

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Rare earth substituted thallium cuprates of the type Tl0.5Pb0.5Sr3−xNdxCu2O7 have been synthesized having 1212 structure. A single phase region exists for x = 0.5 to 0.9. X-ray diffraction data suggest that the rare earth substitution occurs mainly at the Sr site rather than at the Tl site. No Superconductivity is observed for all the compounds down to 4.2 K. The compounds are semiconducting and this suggests that the Tl 6s/Pb 6s bands do not overlap with Cu 3d bands at the Fermi level in agreement with band structure calculations for one Tl---O layer cuprates.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Thallium; Rare Earth; Strontium; Copper; Oxides
ID Code:62048
Deposited On:16 Sep 2011 03:45
Last Modified:16 Sep 2011 03:45

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