Vortex pinning in untwinned YBCO

Authors
Pautrat, A Goupil, C Simon, C Lutke-Entrup, N Placais, B Mathieu, P Simon, Y Rykov, AI Tajima, S
Citation
A. Pautrat et al., Vortex pinning in untwinned YBCO, PHYSICA C, 341, 2000, pp. 1059-1060
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
341
Year of publication
2000
Part
2
Pages
1059 - 1060
Database
ISI
SICI code
0921-4534(200011)341:<1059:VPIUY>2.0.ZU;2-A
Abstract
Three different AC and DC experiments have been performed in untwinned YBCO to clarify the mechanism of vortex pinning. Pinning by surface irregularit ies is the only mechanism consistent with all experiments. This questions u sual interpretation in terms of bulk collective pinning theories. In partic ular, the irreversibility line appears as the dissapearance of superficial critical current.