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# Structure and Superconducting Properties of the $Tl_{1-\delta} CaBa_2Cu_2O_7$ and $Tl_{1-\delta}Y_{1-x}Ca_x Ba_2Cu_2O_7$ Series

Vijayaraghavan, R and Gopalakrishnan, J and Rao, CNR (1992) Structure and Superconducting Properties of the $Tl_{1-\delta} CaBa_2Cu_2O_7$ and $Tl_{1-\delta}Y_{1-x}Ca_x Ba_2Cu_2O_7$ Series. In: Journal of Materials Chemistry, 2 (3). pp. 327-330.

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## Abstract

Superconducting $Tl_{1-\delta}CaBa_2Cu_2O_7$ can be prepared without impurity from the corresponding two Tl-0 layer cuprate only when some Tl deficiency is incorporated. The $Tl_{1-\delta}CaBa_2Cu_2O_7$ and $Tl_{1-\delta}Y_{1-x}Ca_xBa_2Cu_2O_7$ series show maximum $T_c$ at an optimal hole concentration. The $T_c$ maximum occurs at a Cu-0 distance of ca. 1.924 \AA.

Item Type: Journal Article Copyright of this article belongs to Royal Society of Chemistry. Superconductivity; Thallium-calcium-barium-copper-oxygen system; Superconducting oxide Division of Chemical Sciences > Solid State & Structural Chemistry Unit 26 Feb 2008 19 Sep 2010 04:32 http://eprints.iisc.ernet.in/id/eprint/8844

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