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- W2074372100 abstract "Abstract Measurements of extended X-ray absorption fine structure (EXAFS) have been performed at the Cu K-edge between 20 and 300 K in a high- T c pseudo-tetragonal phase of the Bi-Ca-Sr-Cu-O system with nominal composition Bi 4 Ca 3 Sr 3 Cu 4 O x , which shows a superconductivity onset at about 82 K. The temperature dependence of the EXAFS disorder parameter σ 2 indicates strong in-plane Cu-O bonds and a weaker axial Cu-O bond. The usual Einstein-like behaviour of σ 2 is found for temperatures above 100 K, whereas in the superconducting region the σ 2 of both in-plane and out-of-plane Cu-O pairs seem to indicate some structural disorder related to the Cu-O atoms. This fact points out the unique role of the copper-oxygen local structure in the mechanism of superconductivity." @default.
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- W2074372100 date "1988-07-01" @default.
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- W2074372100 title "Temperature dependence of extended x-ray absorption fine structure in the high-Tc superconducting system Bi-Ca-Sr-Cu-O" @default.
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- W2074372100 doi "https://doi.org/10.1016/0921-4534(88)90053-6" @default.
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