Superconductivity and CuK-XANES of (Hg,Re)Sr2CuO4+delta

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/12943

Title:	Superconductivity and CuK-XANES of (Hg,Re)Sr2CuO4+delta
Authors:	BALAMURUGAN, S GOPALAKRISHNAN, IK PRAKASH, O PADALIA, BD YAKHMI, JV SELVAM, P
Keywords:	mercury-based superconductor neutron powder diffraction high-pressure synthesis single-step synthesis x-ray-diffraction t-c oxide superconductors crystal-structures k superconductor hgba2cuo4+delta
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.
URI:	http://dx.doi.org/10.1142/S0217984901001653 http://dspace.library.iitb.ac.in/xmlui/handle/10054/12943 http://hdl.handle.net/10054/12943
ISSN:	0217-9849
Appears in Collections:	Article

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