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

Manivannan, V. ; Rangavittal, N. ; Gopalakrishnan, J. ; Rao, C. N. R. (1993) Structure and superconducting properties of a new family of thallium cuprates, TlSr3-xLnxCu2O7 Physica C: Superconductivity, 208 (3-4). pp. 253-258. ISSN 0921-4534

Full text not available from this repository.

Official URL: http://linkinghub.elsevier.com/retrieve/pii/092145...

Related 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 0.5 ≤ x ≤ 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:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:12809
Deposited On:11 Nov 2010 08:53
Last Modified:03 Jun 2011 04:32

Repository Staff Only: item control page