Influence of geometry on angle-dependent critical current density measurements in thin-film superconductors - Theuss, H.; Becker, T.; Kronmuller, H. (Elsevier)
A simple model is presented describing the angular dependence of the critical current density j"c in thin isotropic superconducting films resulting from demagnetization effects. In this model the angular dependence j"c(θ) arises from the field dependence j"c(B(θ)), if θ is the angle between the film normal and the homogeneous external magnetic field. The calculated j"c(θ) curves are qualitatively similar to measurements on highly anisotropic high-T"c superconducting films, which are usually interpreted as resulting from intrinsic pinning of flux lines between the Cu-O planes.In conclusion, the analysis of the experimental j"c(θ) data carried out on anisotropic thin films should take into account the significant shape effects that lead to a behavior which is similar to the behavior expected for anisotropic thin films due to intrinsic pinning.
http://linkinghub.elsevier.com/retrieve/pii/0921-4534(94)00578-8
Keywords: U