FLUX PINNING AND CREEP FROM COLUMNAR DEFECTS IN HIGH-TEMPERATURE SUPERCONDUCTORS

Authors
KONCZYKOWSKI M
Citation
M. Konczykowski, FLUX PINNING AND CREEP FROM COLUMNAR DEFECTS IN HIGH-TEMPERATURE SUPERCONDUCTORS, Physica. C, Superconductivity, 209(1-3), 1993, pp. 247-250
Citations number
14
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
209
Issue
1-3
Year of publication
1993
Pages
247 - 250
Database
ISI
SICI code
0921-4534(1993)209:1-3<247:FPACFC>2.0.ZU;2-E
Abstract
The introduction of linear defects by means of heavy ion irradiation ( 5.8 GeV Pb) leads to drastic enhancement of the flux pinning in BSCCO and YBCO crystals. In irradiated samples, the magnetic relaxation is d epressed but not completely eliminated. The magnetic decay is non-loga rithmic indicating flux creep via a nucleation process. The effective barrier for flux creep corresponding to vortex loop formation is much lower than the pinning energy by columnar defects.