Flux Flow in Type I and II Superconducting Films

概要

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The experimental results on the linear and nonlinear and nonlinear V-I plots which appear intrinsically in type I and type II superconducting thin films are discussed in terms of the relevant theories, especially, of a long range Coulomb-type interaction between vortices. The V-I plots is quite linear for films with relatively large κ values near T_c and at low temperatures in low applied magnetic fields. They show similar behaviours to those of bulk superconductors. However, these properties become to be obscure because of the appearance of nonlinear V-I plots, roughly speaking, in the higher fields than that in which the lattice spacing of vortices "a"≪(2×2λ^2)/d, where d, the film thickness and λ is the penetration depth. The behaviours of the V-I plots in this region seen to be explained by assuming a fluid-like vortices structure.
社団法人日本物理学会の論文
1972-02-05