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Structure and superconducting properties of a new family of thallium cuprates, TlSr3−xLnxCu2O7

Manivannan, V and Rangavittal, N and Gopalakrishnan, J and Rao, CNR (1993) Structure and superconducting properties of a new family of thallium cuprates, TlSr3−xLnxCu2O7. In: Physica C: Superconductivity, 208 (3-4). pp. 253-258.

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Official URL: http://dx.doi.org/10.1016/0921-4534(93)90196-W

Abstract

Cuprates of the formula TlSr3−xLnxCu2O7 (Ln=Pr, NdorY) derived from the hypothetical TlSr3Cu2O7 show superconductivity with Tcs up to 95 K when 0.5less, approximatex≤0.75, the x=1.0 compositions being insulators. Rietveld analysis of X-ray diffraction profiles has been carried out for two superconducting members of this family. The unit cell a-parameter, and hence the in-plane Cu-O distance, increases with increase in x. The Tc value decreases with increase in x or the in-plane Cu-O distance in all the series of cuprates. Superconductivity in the Tl1−yPbySr3−xNdxCu2O7 systems is found with the highest Tc of 95 K when y=0.2 and x=0.5. The in-plane Cu-O distances in all the cuprates studied fall in the range found in the Sr-class of cuprate superconductors.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 28 Feb 2011 06:38
Last Modified: 28 Feb 2011 06:38
URI: http://eprints.iisc.ernet.in/id/eprint/35773

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