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Nonequilibrium Thermodynamics of Superconducting Alloys in High Magnetic Fields
Author(s) -
Weller W.
Publication year - 1968
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19680300144
Subject(s) - non equilibrium thermodynamics , superconductivity , condensed matter physics , physics , ginzburg–landau theory , magnetic field , mean free path , dissipation , phenomenological model , impurity , thermodynamic potential , landau theory , limiting , microscopic theory , thermodynamics , quantum mechanics , phase transition , mechanical engineering , scattering , engineering
A superconductor with nonmagnetic impurities is considered in the limiting case of small mean free path ( l ≪ ξ 0 ) and high magnetic field ( H ≈ H c2 ). The principles of the phenomenological nonequilibrium thermodynamics are applied to the superconductor and the dissipation function is calculated. For the free energy of the superconductor a functional is used which leads in the equilibrium case to Maki's generalized Ginzburg‐Landau equation. However, the current density resulting from this functional differs in the order of the operators from Maki's expression. The results of the phenomenological considerations are in agreement with the time‐dependent Ginzburg‐Landau equation recently obtained by Caroli and Maki from the microscopic theory.