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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9832

Title: On the presence of Cu1+ in the superconducting (Hg,M)Sr2CuO4+delta; M = Cr, Mo, or Re
Authors: BALAMURUGAN, S
PRAKASH, O
PADALIA, BD
GOPALAKRISHNAN, IK
YAKHMI, JV
SELVAM, P
Keywords: x-ray-absorption
neutron powder diffraction
t-c
crystal-structure
k superconductor
high-pressure
cuk-xanes
hgba2cuo4+delta
mercury
hgba2ca2cu3o8+delta
Issue Date: 2003
Publisher: KLUWER ACADEMIC/PLENUM PUBL
Citation: JOURNAL OF SUPERCONDUCTIVITY, 16(3), 581-584
Abstract: The Cu K-edge measurements on the optimum T-c 1201 compounds (Hg1-xMx)Sr2CuO4+delta (M = Cr, Mo, or Re; 0.10 less than or equal to x less than or equal to 0.30) show besides Cu2+ (predominant) a very weak but distinct signature of Cu1+, only in the superconducting (SC) samples. The Cu1+ feature is conspicuously absent when these compositions are non-superconducting because of different processing conditions. Our finding of monovalent Cu in SC(Hg,M)/Sr-1201 favors the presence of Cu at the Hg-site and this seems to facilitate superconductivity in these cuprates.
URI: http://dx.doi.org/10.1023/A:1023889525034
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9832
http://hdl.handle.net/10054/9832
ISSN: 0896-1107
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