CARBONATE GROUPS AND THE SUPERCONDUCTIVITY IN 123 CUPRATES Y0.8CA0.2BA2CU3-XCXOY

Authors
JIRAK Z HEJTMANEK J KNIZEK K SONNTAG R
Citation
Z. Jirak et al., CARBONATE GROUPS AND THE SUPERCONDUCTIVITY IN 123 CUPRATES Y0.8CA0.2BA2CU3-XCXOY, Physica. C, Superconductivity, 267(3-4), 1996, pp. 225-232
Citations number
16
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
267
Issue
3-4
Year of publication
1996
Pages
225 - 232
Database
ISI
SICI code
0921-4534(1996)267:3-4<225:CGATSI>2.0.ZU;2-M
Abstract
Three ceramic superconductors Y0.8Ca0.2Ba2Cu3-xCxOy (x=0, 0.13 and 0.3 4) were prepared both in the oxidized and partially reduced forms. The boundaries of the superconducting regions were estimated to y = 6.40, 6.50 and 6.75 for the three systems, respectively. The role of incorp orated CO3 groups has been investigated by means of electric resistivi ty, thermoelectric power and AC susceptibility measurements and, for t he oxidized samples, by neutron diffraction. The presence of the hole type carriers in the CuO2 planes was analyzed by the bond strength sum mation.