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Proceedings Paper

Nanostructure in the La2CuO4-based superconductors
Author(s): Edward A. Stern; Daniel Haskel
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Paper Abstract

Orientational dependent x-ray absorption fine structure (XAFS) measurements on the local structure of the La2CuO4 based high Tc superconductors La2-xSrxCuO4, La2-xBaxCuO4, La1.6-xSrxNd0.4CuO4, La1.85Sr0.15Cu1-yNiyO4, find both displacement and orientational disorder induced by doping (Sr,Ba) and alloying (Nd,Ni) atoms. The displacement disorder is in the first few neighboring atoms to the perturbing atom while the orientational disorder is of nanometer-sized regions which have disordering of the tilt angles of their CuO6 octahedra with respect to neighboring regions. This disorder affects both the normal and superconducting properties of the materials. It is found that disorder induced in the Cu-O2 planes has the greatest detrimental effect on Tc and conductivity.

Paper Details

Date Published: 7 November 2002
PDF: 16 pages
Proc. SPIE 4811, Superconducting and Related Oxides: Physics and Nanoengineering V, (7 November 2002); doi: 10.1117/12.455492
Show Author Affiliations
Edward A. Stern, Univ. of Washington (United States)
Daniel Haskel, Argonne National Lab. (United States)

Published in SPIE Proceedings Vol. 4811:
Superconducting and Related Oxides: Physics and Nanoengineering V
Ivan Bozovic; Davor Pavuna, Editor(s)

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