Abstract
AbstractThe radius r and the distance a of the flux tubes in the triangular flux‐tube lattice of type‐I superconductors are determined within the framework of the Ginzburg‐Landau theory as functions of the applied magnetic field, the surface energy parameter, Δ, and the thickness, L, of a superconducting layer in the limit N → 1 (N demagnetizing coefficient of the sample, 0 ≤ N≤ 1). It is shown that near the penetration field of the intermediate state the Gibbs free energy of the flux‐tube structure is lower than that of a laminar domain structure.
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