Europhys. Lett, 48 (3), pp. 313-319 (1999)
Modulation instability of the order parameter in thin-film superconductors with edge barrier
D. Yu. Vodolazov 1, I. L. Maksimov 1 and E. H. Brandt 2
1 Nizhny Novgorod University - 603600 Nizhny Novgorod,
2 Max-Planck-Institut für Metallforschung - D-70569 Stuttgart, Germany
(received 9 April 1999; accepted in final form 8 September 1999)
PACS. 74.60Ec - Mixed state, critical fields, and surface sheath.
The influence of the ideal edge barrier on the entry of vortices and on the magnetization curve of a thin superconducting film is studied within Ginzburg-Landau theory. A modulation instability of the superconducting order parameter is predicted to occur at the film edges when the longitudinal component of the kinematic momentum reaches a critical value at the edges. Successive instabilities lead to a sequence of vortex-chain entry fields and to a serrated structure in the magnetization curve.
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