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|Title:||On the presence of Cu1+ in the superconducting (Hg,M)Sr2CuO4+delta; M = Cr, Mo, or Re|
Neutron Powder Diffraction
|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.|
|Appears in Collections:||Article|
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