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IJPAP Vol.42(01) [January 2004] >


Title: Fe content variation and superconducting order parameter dimensionality in ErBa2Cu3-xFexO7-
Authors: Upreti, U C
Keywords: ErBa2Cu3-xFexO7- Superconducting order parameter High Tc superconductors
Issue Date: Jan-2004
Publisher: CSIR
Abstract: The effects of predominantly chain-site dopant, Fe, concen­tration variation on superconducting order parameter fluctuations(SCOPF) in ErBa2Cu3-xFe xO7- polycrystalline bulk samples are presented and compared. A large reduction in OPD near the dynamic critical region is seen, suggesting an anomalous crossover and indicating a much slower suppression of superconductivity. Near to Tc the SCOPF behaviour suggests Cu-O network cou­pling deterioration. It is also observed that the SCOPF are invariant to Fe low concentrations and with Fe concentration increase these show marked dimensionality variation and increased oxygen content dependence. Higher Fe concentration is seen to promote a dimensionality reversal.
Page(s): 38-42
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.42(01) [January 2004]

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