Definition: | phenomenon in which a superconducting state appears within about one coherence length from the surface of a material even under a magnetic field strength above the upper critical field strength, Hc2 Note 1 to entry: If the magnetic field is parallel to the surface of the sample, surface superconductivity appears within a range of a magnetic field strength from Hc2 to Hc3 = 1,695 Hc2 for type II superconductors and from Hc to Hc3 = 2,40 Hc for type I superconductors.
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