INTERGRANULAR AND INTRAGRANULAR IRREVERSIBILITY TEMPERATURES IN HIGH-T(C) CERAMIC SUPERCONDUCTORS

Authors
LUZYANIN ID GINZBURG SL KHAVRONIN VP TAROVIK EG LIPPOLD B HERRMANN J BORNER H WURLITZER M
Citation
Id. Luzyanin et al., INTERGRANULAR AND INTRAGRANULAR IRREVERSIBILITY TEMPERATURES IN HIGH-T(C) CERAMIC SUPERCONDUCTORS, Superconductor science and technology, 6(8), 1993, pp. 597-604
Citations number
7
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter
Journal title
Superconductor science and technology → ACNP
ISSN journal
09532048
Volume
6
Issue
8
Year of publication
1993
Pages
597 - 604
Database
ISI
SICI code
0953-2048(1993)6:8<597:IAIITI>2.0.ZU;2-8
Abstract
It is first demonstrated experimentally that there are two different i rreversibility temperatures, T(irr)cer and T(irr)gr (T(irr)cer < T(irr )gr), in high-T(c) ceramic superconductors of the compositions Bi1.6Pb 0.3Sb0.1Sr2Ca2Cu2.8Oy and YBa2Cu4O8. At T < T(irr)cer, both intragranu lar and intergranular irreversible currents are induced by pinning. Wh en T > T(irr)gr, there are no irreversible currents. It is found that T(irr)gr < T(c) for bismuth ceramics and T(irr)gr is similar to T(c) f or YBa2Cu4O8.