Publication
Title
Electron-microscopy investigation of superconducting la2cu(o, f)4+y oxyfluoride
Author
Abstract
The fluorination of La2CuO4 can lead to different oxyfluoride compounds depending on the TF2 temperature of the fluorine gas treatment. When 150-degrees-C T(F2) less-than-or-equal-to 200-degrees-c less-than-or-equal-to 200-degrees-C a superconducting material is obtained. Previous neutron diffraction experiments as well as the EXAFS measurements at the La L(III) edge indicate that extra anions lie in an interstitial site between the two (LaO) layers. Electron diffraction patterns clearly show the existence of an incommensurate modulation due to the presence of shear planes. A second phase is also pointed out which can be obtained as a major component when the fluorination temperature is raised to 230-degrees-C. This phase which is not a superconductor crystallizes with the monoclinic symmetry.
Language
English
Source (journal)
European journal of solid state and inorganic chemistry. - Paris
Publication
Paris : 1993
ISSN
0992-4361
Volume/pages
30:11(1993), p. 1095-1108
ISI
A1993MX13500006
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 29.02.2012
Last edited 17.11.2017