Magnetic dipole-vortex interaction in a bilayer superconductor/soft-magnet heterostructure

Details Magnetic dipole-vortex interaction in a bilayer superconductor/soft-magnet heterostructure Magnetic dipole-vortex interaction in a bilayer superconductor/soft-magnet heterostructure

2005-10-10

arxiv.org/abs/cond-mat/0510251v1

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures, revtex4

Scientific paper

10.1209/epl/i2005-10534-y

We study the penetration of the nonuniform magnetic field, created by a magnetic dipole with out-of-plane magnetization, into a film heterostructure composed of a type-II superconductor layer and a soft-magnet layer. In the framework of the London approach, the energy of the magnetic dipole-vortex interaction is derived and the critical value of the dipole moment for the first appearance of a vortex in the superconducting constituent is found for two cases of the layer ordering, namely when the dipole is located near the superconducting or, respectively, the magnetic constituent.

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