SUPERCONDUCTING PROPERTIES OF PB0.4BI1.8CA2.2SR2.0CU3OY AND PB-0.3BI1.7CA2.4SR1.6CU3OY CERAMICS

Authors
TIMKO M MATAS S KOVAC J MIHALIK M DIKO P KONIG W GRITZNER G
Citation
M. Timko et al., SUPERCONDUCTING PROPERTIES OF PB0.4BI1.8CA2.2SR2.0CU3OY AND PB-0.3BI1.7CA2.4SR1.6CU3OY CERAMICS, Physica. C, Superconductivity, 235, 1994, pp. 933-934
Citations number
5
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
235
Year of publication
1994
Part
2
Pages
933 - 934
Database
ISI
SICI code
0921-4534(1994)235:<933:SPOPAP>2.0.ZU;2-R
Abstract
Superconducting properties of Pb0.4Bi1.8Ca2.2Sr2.0Cu3Oy and Pb0.3Bi1.7 Ca2.4Sr1.6Cu3Oy ceramics were studied by measurements of magnetization and electrical resistivity. The activation energy of pinning at 4.2 K for Pb0.3Bi1.7Ca2.4Sr1.6Cu3Oy was found to be higher than for Pb0.4Bi 1.8Ca2.2Sr2.0Cu3Oy; at 77 K we observed the opposite tendency. The cri tical current density was estimated to be of order 10(6) A/cm(2) and 1 0(3) A/cm(2) at 4.2 K and 77 K, respectively. The irreversibility line was found to vary as a power law (1-Ti-irr/T-c) = AH(n), where A and n are sample dependent constants related to the flux pinning propertie s of the samples.