Critical fluctuations in the thermodynamics of quasi-two-dimensional type-II supeconductors

Thermodynamic quantities in quasi-2D type-II superconductors exhibit characteristic scaling behavior for high fields in the critical region around Hc2(T). Using a nonperturbative approach to the Ginzburg-Landau free energy functional, the scaling functions for the free energy, magnetization, entropy, and specific heat are evaluated in a closed form. The experimental data for Bi₂{Sr}₂Ca₂{Cu}₃O₁₀ are presented which are in agreement with the theoretical results.