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Title: Structure and properties of Tl0.5Pb0.5Sr2Gd2−xCexCu2O9−δ
Authors: Vijayaraghavan, R
Michel, C
Maignan, A
Hervieu, M
Martin, C
Raveau, B
Rao, C N R
Keywords: Cu-O System
Powder Diffraction
Issue Date: 10-Feb-1993
Publisher: Elsevier Science BV
Citation: Physica C 206(1-2), 81-89 (1993)
Abstract: A systematic study of the Tl0.5Pb0.5Sr2Gd2−xCexCu2O9−δ system has revealed the existence of a pure phase in the compositional. range 0.0≤x≤0.6 crystalizzing in the 1222 structure. It has an intersheet distance of approximately 6 Å, a value much higher than those found in other cuprates with double CuO2 sheets interleaved by a single fluorite layer. Superconductivity has been observed in the range 0.1≤x≤0.4 with a Tc of 45 K and a superconductive volume fraction up to 20% for the optimal composition. An interesting variation of the superconducting properties of the above system with the composition, i.e. cerium content, has also been noticed. A possible dependence of superconductivity on the coupling between CuO2 sheets in the layered cuprates has been pointed out to bring out a correlation between structure and properties.
Description: Restricted Access
Other Identifiers: 0921-4534
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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