An X-ray and neutron diffraction study of cation substituted TlSr2CuO5

Kovatchev, D and Hewat, AW and Rangavittal, N and Manivannan, V and Row, Guru TN and Rao, CNR (1991) An X-ray and neutron diffraction study of cation substituted TlSr2CuO5. In: Physica C: Superconductivity, 173 (5-6). pp. 444-452.

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Abstract

The structures of TlSr(2−x)LaxCuO(5+δ), with x=0.5, 0.75 and 1, and Tl.5Pb0.5Sr2CuO(5+δ) have been examined with X-ray and neutron powder Rietveld refinement. They are isostructural (P4/mmm) with the corresponding thallium-barium cuprate having one Cu-O layer with Cu3+ ions in octahedral coordination with oxygen (structure type 1201). The influence of cation substitution and disorder on the structure and superconducting properties of these phases have been investigated. La3+ substitution for Sr2+ stabilises the structure and reduces Cu3+, permitting superconductivity, while Pb2+ substitution for Tl3+ only stabilises the structure, without reducing Cu3+.

Item Type:	Journal Article
Publication:	Physica C: Superconductivity
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	11 Nov 2010 06:56
Last Modified:	11 Nov 2010 06:56
URI:	http://eprints.iisc.ac.in/id/eprint/33628

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