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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/12177

Title: Superconductivity and possible overdoping in Lu1-xCaxBa2Cu3O7-delta
Authors: GNANASEKAR, KI
SHARON, M
PINTO, R
TAMHANE, AS
PURANDARE, SC
PAI, SP
GUPTA, LC
VIJAYARAGHAVAN, R
Keywords: copper-oxide superconductors
cuprate superconductors
structural anomalies
high-tc
temperature
system
oxygen
substitution
y1-xluxba2cu3o7-delta
chemistry
Issue Date: 1996
Publisher: SPRINGER
Citation: ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 99(2), 173-177
Abstract: Structural and superconducting properties of the system Lu1-xCaxBa2 CU3O7-delta, both in bulk as well as thin film form, have been investigated. Presence of large Ca-ions at the Lu-sites is responsible for phase stability (in 1-2-3 phase) in bulk. In argon annealed tetragonal samples (delta:1) superconductivity is reinstated as in these samples, presence of Ca-ions lead to the generation of holes in the Cu-O planes. In oxygen annealed bulk samples and thin films, there is a large depression of T-c due to divalent Ca-ions present in concentration x < 0.2. Our data indicate that this depression of T-c is likely due to overdoping effect.
URI: http://dx.doi.org/10.1007/s002570050025
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12177
http://hdl.handle.net/10054/12177
ISSN: 0722-3277
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