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

Please use this identifier to cite or link to this item: https://libjncir.jncasr.ac.in/xmlui/handle/10572/890

Title:	An X-ray and neutron diffraction study of cation substituted TlSr2CuO5
Authors:	Kovatcheva, D Hewat, A W Rangavittal, N Manivannan, V Row, T N Guru Rao, C N R
Keywords:	Temperature Superconductor La1.85sr0.15cuo4 Crystal-Structure Tc Transition Valence
Issue Date:	15-Feb-1991
Publisher:	Elsevier Science BV
Citation:	Physica C : Superconductivity 173(5-6), 444–452 (1991)
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+.
Description:	Restricted Access
URI:	https://libjncir.jncasr.ac.in/xmlui/10572/890
Other Identifiers:	0921-4534
Appears in Collections:	Research Papers (Prof. C.N.R. Rao)

Files in This Item:

File	Description	Size	Format
1991.35.pdf Restricted Access		668.21 kB	Adobe PDF	View/Open Request a copy

DSpace JSPUI