Physics – Condensed Matter – Superconductivity
Scientific paper
1999-11-18
Physics
Condensed Matter
Superconductivity
24 pages, 10 figures
Scientific paper
The magnetic characteristics for superconducting samples of different geometries (plates and films of various widths) and orientation with respect to external field are compared. A similarity is established between the magnetization curves M(H) and the corresponding susceptibilities. A sign reversal is predicted for the 3rd harmonic of the ac susceptibillity when the irreversibility mechanism changes from bulk pinning to edge barrier. A mutual influence of the edge barrier and bulk pinning on the magnetization curves and field-dependent ac susceptibility is studied on the basis of an exactly solvable model (narrow plate in a parallel field and/or narrow film in a perpendicular magnetic field).
Maksimov Igor L.
Maksimova G. M.
Vodolazov Denis Yu.
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