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Title: EXAFS study of Sr doped Y0.4Pr0.6Ba2Cu3O7-δ*
Authors: Anvekar, T S
Priolkar, K R
Sathe, V G
Pimpale, A V
Sarode, P R
Dalal, V N Kamal
Issue Date: Apr-2002
Publisher: NISCAIR-CSIR, India
Abstract: The Cu K-edge extended X-ray absorption line structure (EXAFS) studies in YBa2Cu3O7-δ and Y0.4Pr0.6Ba2-x SrxCu3O7-δ  with 0≤ x≤1.25 have been carried out to examine the changes in near neighbour environment of Cu as a function of Sr doping. There is a sudden shift of apical oxygen O(4) towards the CuO planes in compounds wherein superconductivity is restored. This contraction in the Cu(2)-O(4) bond length seems to weaken the Pr-O hybridization and thereby restoring superconductivity. Infrared absorption studies on these compounds also support this picture.
Page(s): 272-276
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.40(04) [April 2002]

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