A structural model for the CaLaBaCu3O7 superconductor from a detailed EXAFS study

Authors
Gurman, SJ Amiss, JC Venkatesh, S Kumari, K Singhai, RK Garg, KB
Citation
Sj. Gurman et al., A structural model for the CaLaBaCu3O7 superconductor from a detailed EXAFS study, J SYNCHROTR, 6, 1999, pp. 761-763
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF SYNCHROTRON RADIATION
ISSN journal
09090495 → ACNP
Volume
6
Year of publication
1999
Part
3
Pages
761 - 763
Database
ISI
SICI code
0909-0495(19990501)6:<761:ASMFTC>2.0.ZU;2-S
Abstract
The tetragonal bulk superconductor CaLaBaCu3O7 is obtained from YBa2Cu3O7 b y the replacement of Y by La and some of the Ba by Ca. Its detailed structu re, particularly the cation site occupancy, is uncertain. We have made EXAFS measurements on the edges of all four cations, Ba, Ca, C u and La to determine the local environment of each and attempt to determin e the site occupancies and to construct a possible structure, including loc al distortions.