Some cuprates have an upper critical field of about 100 tesla.
2.
Tests at up to 45 teslas suggest the upper critical field of LaFeAsO 0.89 F 0.11 may be around 64 teslas.
3.
Werthamer Helfand Hohenberg theory predicts the upper critical field ( H c2 ) at 0 K from T c and the slope of H c2 at T c.
4.
As the magnetic field increases, the flux cylinders move closer together and eventually at the upper critical field H _ { c2 }, they leave no room for the superconducting state and the zero-conductivity property is lost.
5.
Tests in magnetic fields up to 45 teslas suggest the upper critical field of LaFeAsO 0.89 F 0.11 may be around 64 T . A different lanthanum-based material tested at 6 K predicts an upper critical field of 122 T in La 0.8 K 0.2 FeAsO 0.8 F 0.2.
6.
Tests in magnetic fields up to 45 teslas suggest the upper critical field of LaFeAsO 0.89 F 0.11 may be around 64 T . A different lanthanum-based material tested at 6 K predicts an upper critical field of 122 T in La 0.8 K 0.2 FeAsO 0.8 F 0.2.
7.
Abrikosov vortices can be trapped in a type-II superconductor by chance, on defects, etc . Even if initially type-II superconductor contains no vortices, and one applies a magnetic field H larger than the lower critical field H _ { c1 } ( but smaller than the upper critical field H _ { c2 } ), the field penetrates into superconductor in terms of "'Abrikosov vortices " '.
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