Simulation study of the mixed state in inhomogeneous superconductors

A simulation study of the mixed state in inhomogeneous type-II superconductors is given based on the time-dependent Ginzburg-Landau equation. Defects are introduced by spatially changing the parameters in the Ginzburg-Landau free energy. It is shown how the magnetic flux is pinned by various defects...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 1994-07, Vol.227 (3), p.387-394
Main Authors: Kato, Ryuzo, Enomoto, Yoshihisa, Maekawa, Sadamichi
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Mixed state, critical fields, and surface sheath
Physics
Properties of type I and type II superconductors
Superconductivity
Vortex lattices ,flux pinning, flux creep
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Summary:A simulation study of the mixed state in inhomogeneous type-II superconductors is given based on the time-dependent Ginzburg-Landau equation. Defects are introduced by spatially changing the parameters in the Ginzburg-Landau free energy. It is shown how the magnetic flux is pinned by various defects and how the flux lattice is distorted by pinning due to defects. The distribution of the vortex density trapped in the twin boundaries is examined and compared with experimental results observed in high-temperature superconductors by the high-resolution Bitter technique.
ISSN:0921-4534
1873-2143
DOI:10.1016/0921-4534(94)90098-1