Multiple Scattering Analysis of Cu-K EXAFS in Bi2Sr1.5Ca1.5Cu2O8+d
J. R"ohler, R. Cr"usemann
Abstract
We have analyzed the Cu K-EXAFS of Bi2Sr1.5Ca1.5Cu2O8+d using a full multiple scattering analysis in a cluster with diameter d = 7.6 AA. The numerous quasi one-dimensional structural elements give rise to significant multiple scattering contributions in the EXAFS. We confirm the Sr/Ca ratio of the sample is 1:1, and one Ca atom is located close to a nominal Sr-site. At 40 K the dimpling angle in the $ CuO2-plane is found to be < 3.5 degrees.
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