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Vortex-antivortex dynamics and field-polarity-dependent flux creep in hybrid superconductor/ferromagnet nanostructures

M. Lange·M. J. Van Bael·A. V. Silhanek·V. V. Moshchalkov
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Abstract

Vortex-antivortex arrays that are created in a type-II superconducting film by lattices of ferromagnetic dots with perpendicular anisotropy have been investigated. The highest critical current is shifted to a nonzero value of the applied field, and current-voltage characteristics show different regimes of vortex motion even in zero-applied field due to the presence of the vortex-antivortex arrays. Creep of interstitial vortices is observed at low driving forces. This flux creep is strongly field-polarity dependent.

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M. Lange, M. J. Van Bael, A. V. Silhanek, V. V. Moshchalkov. 2005-08-19. Vortex-antivortex dynamics and field-polarity-dependent flux creep in hybrid superconductor/ferromagnet nanostructures. https://doi.org/10.1103/physrevb.72.052507

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