J. Phys. IV France
Volume 7, Numéro C2, Avril 1997
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
Page(s) C2-735 - C2-740
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure

J. Phys. IV France 7 (1997) C2-735-C2-740

DOI: 10.1051/jp4:1997222

Stripe structure and Non-Homogeneity of the CuO2 Plane by Joint EXAFS and Diffraction

A. Bianconi1, N.L. Saini1, A. Lanzara1, M. Lusignoli1, T. Rossetti1, P.G. Radaelli2, P. Bordet3, Å. Kvick4 and H. Oyanagi5

1  Dipartimento di Fisica, Università di Roma "La Sapienza", P.A. Moro 2, 00185 Roma, Italy
2  Institut Laue Langevin, Av. des Martyrs, 38043 Grenoble, France
3  Laboratoire de Crystallographie CNRS, Av. des Martyrs, 38043 Grenoble, France
4  European Synchroton Radiation Facility, (ESRF), BP. 220, 38043 Grenoble, France
5  Electrotechnical Laboratory, Umezono, Tsukuba, Ibaraki 305, Tsukuba, Japan

Local structure of the CuO2 plane in Bi2Sr2CaCu2O8+δ (Bi2212) superconductor has been solved by joint Cu K-edge extended X-ray absorption fine structure (EXAFS) and anomalous X-ray diffraction. The Cu-O pair distribution function (PDF) has been measured by EXAFS and diffraction. The displacement of the Cu ions along the c-axis shows largest amplitude and anharmonic character. The results show flat stripes of the CuO2 lattice of width L = 15 ± 0.5 Å that are separated by stripes of bent CuO2 plane. The modulation of the CuO2 plane measured by EXAFS and anomalous diffraction has been discussed.

© EDP Sciences 1997

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