Magnetic properties of filamentary superconductors
The upper critical field Hc2 for coupled filamentary superconductors is analyzed within the context of a Ginzburg-Landau theory similar to the Lawrence-Doniach theory for layered superconductors. Regardless of the field angle, the filaments decouple at a temperature T*, below which Hc2 is infinite. Unusual anomalies are predicted to occur in the Hc2, ∥(T) curve, corresponding to a commensurate fitting of the vortices into the filament lattice. Near Tc, the lower critical field Hc1 is found to obey a simple anisotropic mass law.
KeywordsCritical Field Flux Quantum Layered Superconductor Superconducting Order Parameter Filament Lattice
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