A variational approach to the macroscopic electrodynamics of anisotropic hard superconductors.

created by malusa on 07 Mar 2008

[BibTeX]

Accepted Paper

Inserted: 7 mar 2008

Journal: Arch. Rational Mech. Anal.
Year: 2008

Abstract:

We consider the Bean's critical state model for anisotropic superconductors. A variational problem solved by the quasi--static evolution of the internal magnetic field is obtained as the $\Gamma$-limit of functionals arising from the Maxwell's equations combined with a power law for the dissipation. Moreover, the quasi--static approximation of the internal electric field is recovered, using a first order necessary condition.

If the sample is a long cylinder subjected to an axial uniform external field, the macroscopic electrodynamics is explicitly determined.