Effects of crossed columnar defects on vortex pinning in Bi2Sr2CaCu2O8
Laboratoire CRISMAT (UMR 6508) , ISMRA et Université de Caen, 6 boulevard du Maréchal Juin, 14050 Caen Cedex,
Corresponding author: a email@example.com
Published online: 15 July 2000
To investigate the existence of a splay effect in Bi2Sr2CaCu2O8 (Bi-2212), vortex pinning has been studied in different configurations of strongly inclined columnar defects (75° from the c axis), installed by heavy-ion irradiation. It is shown that the symmetry of the track setting with respect to the field direction is a more influent parameter than the presence of a dispersion in the track directions. We claim that the enhanced pinning efficiency which is observed in some splayed configurations of columnar defects in Bi-2212 can be interpreted without invoking a splay effect.
PACS: 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.60.Jg – Critical currents / 74.72.Hs – Bi-based cuprates
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000