Flux creep and critical current density of the vortex liquid phase in YBa2Cu3O7-delta film

Authors
Shan, L Wang, ZH Xu, XN Jin, X Shen, LJ Lam, CC
Citation
L. Shan et al., Flux creep and critical current density of the vortex liquid phase in YBa2Cu3O7-delta film, PHYSICA C, 341, 2000, pp. 1327-1328
Citations number
4
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
1327 - 1328
Database
ISI
SICI code
0921-4534(200011)341:<1327:FCACCD>2.0.ZU;2-7
Abstract
The current-voltage characteristics (CVC's) of YBa2Cu3O7-delta epitaxial fi lm were determined at various temperatures and magnetic fields. The pinning potential U-0(T, H), critical current density J(c)(T, H) and effective pin ning potential U-eff(H, T, J) were derived from the CVC's. It is shown that the nonlinear response regime of the vortex-liquid (NRVL) display a changi ng process from vortex plastic creep to free flow with the dynamic exponent changing from -0.5 to 0.