Quantization and Confinement Effects in Superconducting Films with an Antidot Lattice

概要

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We have studied flux line confinement by regular arrays of submicrorr holes (triangular and square antidot lattices) in superconducting films. Critical current density j_c and pinning force f_p are very strongly enhanced due to pinning of single or multi-quanta vortices by the antidotes. Direct measurements of j_c and f_p for several well-defined antidot diameters D, proves that pinning centers with size considerably larger than the temperature-dependent coherence length ζ(T) are much more efficient than those with D ≅ ζ(T).
社団法人応用物理学会の論文
1995-08-30