L. Krusin-Elbaum, A.P. Malozemoff, et al.
Physica C: Superconductivity and its Applications
Orders-of-magnitude enhancements of persistent currents J are reported in YBa2Cu3O7−Δ with columnar defects arranged in a variety of splayed configurations. The largest J is obtained for a planar distribution Ppl(Θ), with a splay angle Θopt =+/−5°. A comparison of Ppl(Θ) and a Gaussian distribution PG(Θ) suggests that pinning by the latter is controlled by large-angle tails of the Gaussian which appear to enhance thermal creep rate. Numerical simulations confirm the existence of the regimes where vortex motion is promoted rather than suppressed by splay. © 1996 The American Physical Society.
L. Krusin-Elbaum, A.P. Malozemoff, et al.
Physica C: Superconductivity and its Applications
L. Civale, A.D. Marwick, et al.
Physical Review Letters
M.O. Aboelfotoh, A.D. Marwick, et al.
ICDS 1993
C.C. Chi, L. Krusin-Elbaum, et al.
International Conference on Low Temperature Physics (LT) 1983