INFLUENCE OF SIMULTANEOUS SUBSTITUTION OF CA AND CO IN A YBA2CU3O7-DELTA SUPERCONDUCTOR - NEUTRON STRUCTURAL STUDIES

Authors
SHARMA R GANGULY R RAJAGOPAL H SEQUEIRA A YAKHMI JV DASANNACHARYA BA
Citation
R. Sharma et al., INFLUENCE OF SIMULTANEOUS SUBSTITUTION OF CA AND CO IN A YBA2CU3O7-DELTA SUPERCONDUCTOR - NEUTRON STRUCTURAL STUDIES, Physica. B, Condensed matter, 213, 1995, pp. 90-93
Citations number
14
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica. B, Condensed matter → ACNP
ISSN journal
09214526
Volume
213
Year of publication
1995
Pages
90 - 93
Database
ISI
SICI code
0921-4526(1995)213:<90:IOSSOC>2.0.ZU;2-2
Abstract
Neutron structural study shows that partial substitution of Co for Cu in YBa2Cu3O7-delta leads to an uptake of excess oxygen in chain-layers , but causes some oxygen depletion in CuO2 planes. Coupled Co/Ca subst itution arrests uptake of excess oxygen which could be the cause of pa rtial restoration of T-c vis-g-vis the samples doped with Co only. A n ew feature of the doped samples is the presence of a small amount of o xygen at the (0, 0, 1/2) sites.