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|Title: ||Superconductivity and CuK-XANES of (Hg,Re)Sr2CuO4+delta|
|Authors: ||BALAMURUGAN, S|
|Keywords: ||mercury-based superconductor|
neutron powder diffraction
|Issue Date: ||2001|
|Publisher: ||WORLD SCIENTIFIC PUBL CO PTE LTD|
|Citation: ||MODERN PHYSICS LETTERS B, 15(9-10), 261-268|
|Abstract: ||The 1201-type nominal (Hg(0.9)Reo(0.1))Sr2CuO4+delta samples, synthesized at similar to 920 degreesC in partial vacuum, show, from temperature dependent dc-magnetization, T-c(onset) similar to 54 K. The CuK-edge features obtained from X-ray absorption measurements on the sample show predominantly Cu2+ state and a weak but distinct Cu1+ signature due to superconducting 1201 phase (after taking due account of impurity Sr2CuO3, and SrCuO2 phases). The presence of Cu1+ signature in SC samples is consistent with our earlier observations of Cu1+ in Ba-free superconducting (Hg,Cr)-1201 and (Hg,Mo)-1201 materials.|
|Appears in Collections:||Article|
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