X-Ray Absorption Spectra of High Tc Superconducting SrxLa2-xCuO4-y
- 1 April 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (4A) , L488-490
- https://doi.org/10.1143/jjap.26.l488
Abstract
Cu K-edge extended X-ray absorption fine structure (EXAFS) and near-edge structure have been measured in high T c superconducting Sr x La2-x CuO4-y . The Fourir transform analysis shows the axial elongation of CuO6 octahedron along the c-axis with four short (1.89 Å) and two long (2.41 Å) Cu-O bonds, which are slightly shorter than those in CuO and La2CuO4 indicating the presence of enhanced Cu(3d)-O(2p) interaction. The near-edge spectrum of Sr x La2-x CuO4-y is similar to that of Cu2O rather than CuO, which is interpreted as an evidence for the monovalent character of Cu ions.Keywords
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