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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9836

Title: Susceptibility and X-ray absorption measurements on superconducting (Hg,Mo)Sr2CuO4+delta system
Authors: BALAMURUGAN, S
GUPTA, S
PADALIA, BD
PRAKASH, O
GOPALAKRISHNAN, IK
YAKHMI, JV
SELVAM, P
Keywords: neutron powder diffraction
t-c
high-pressure
crystal-structure
k superconductor
hgba2cuo4+delta
mercury
hgba2ca2cu3o8+delta
hgba2cacu2o6+delta
hg
Issue Date: 2001
Publisher: KLUWER ACADEMIC/PLENUM PUBL
Citation: JOURNAL OF SUPERCONDUCTIVITY, 14(3), 437-441
Abstract: In continuation of our recent work [1] on superconducting 1201-type (Hg,M)Sr2CuO4+delta M = Cr system, the samples of (Hg1-xMx)Sr2CuO4+delta, M = Mo (x = 0.15, 0.25, and 0.30), were synthesised in partial vacuum. The x = 0.15 composition shows a maximum T-c(onset) of similar to 66 K. while x = 0.25 exhibits T-c(onset) of -50 K. For x = 0.30 sample, the observed T-c(onset) of discretely different from the reported values of 20 and 58 K. X-ray absorption measurements on (Hg,Mo)-1201 samples show Hg in divalent state and Cu predominantly in Cu2+ state. A weak but distinct Cu1+ signature is also observed in the SC (Hg,Mo)-1201 samples., which is absent in the impurity SrCuO2 and Sr2CuO3 phases. On the basis of available reports, it is viewed that Cu1+ can arise because of a small fraction of Cu occupying the Hg site in (Hg,Mo)-1201 system.
URI: http://dx.doi.org/10.1023/A:1011147010568
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9836
http://hdl.handle.net/10054/9836
ISSN: 0896-1107
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