Apparent Universal Behavior of Fluctuation-Induced Diamagnetism in Superconductors

Abstract
The dependence on temperature and magnetic field of the diamagnetism due to fluctuations above Tc, while showing marked deviations from the behavior expected on the basis of the Ginzburg-Landau theory, appears to follow a universal behavior if one introduces a new characteristic field Hs, which may be expressed in terms of other known material-dependent parameters.