Magnetic-dipole induced appearance of vortices in a bilayered superconductor/soft-magnet heterostructure

Details Magnetic-dipole induced appearance of vortices in a bilayered superconductor/soft-magnet heterostructure Magnetic-dipole induced appearance of vortices in a bilayered superconductor/soft-magnet heterostructure

2006-12-04

arxiv.org/abs/cond-mat/0612083v1

Physics

Condensed Matter

Superconductivity

2 pages, 1 figure; accepted in Physica C for the special issue of Preceedings of the 8th Int. Conference on Materials and Mech

Scientific paper

10.1016/j.physc.2007.04.049

The penetration of the magnetic field of an infinitesimal magnetic dipole into a bilayered type-II superconductor/soft-magnet heterostructure is studied on the basis of the classical London approach. The critical values of the dipole moment for the first appearance of a single magnetic vortex and, respectively, a magnetic vortex-antivortex pair in the superconductor constituent are obtained, when the magnetic dipole faces the superconductor or the soft-magnet constituent. This reveals that the soft-magnet constituent inhibits penetration of vortices into the superconductor constituent, when the dipole faces the soft-magnet constituent.

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