Abstract
The distribution of magnetic fields in the vortex lattices of type-II superconductors has been investigated. This has been done in the framework of Ginzburg-Landau (GL) theory for isotropic and anisotropic (HTSC) superconductors. Analytical and numerical results obtained show the way to verify experimentally the superconductivity theory and to determine the area of applicability of various GL theory approximations. It is shown that in some cases the system of GL equations for an anisotropic superconductor can be reduced to that of an isotropic one. The numerical solutions of GL equations were obtained. New approaches are suggested to approximate the exact solution in the whole range of magnetic fields. The exact solutions of GL equations are compared with the most frequently used approximations in the broad range of magnetic fields and κ parameter. The influence of nuclear magnetic moments upon the observable distributions of internal magnetic fields is considered.
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