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Journal of Low Temperature Physics

, Volume 139, Issue 1, pp 257–272 | Cite as

Vortex-Antivortex Lattices in Superconducting Films with Magnetic Pinning Arrays

  • M. V. Milošević
  • F. M. Peeters
Original Article

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We found a rich variety of vortex structures when a thin superconducting film (SC) is covered with a lattice of out-of-plane magnetized magnetic dots (MDs). The vortices are confined to the MD regions, and antivortices nucleate into regular lattices which relax through several second order transitions towards single-dot vortex-antivortex configurations with increasing period of the magnetic array. Creation of vortex-antivortex pairs with increasing MD-magnetization is controlled by a single quantity - the superfluid velocity. We demonstrate that due to the vortex-antivortex pairs and the supercurrents induced by the MDs, the critical current in the sample actually increases if exposed to a homogeneous external magnetic field, contrary to conventional SC behavior. We explain further experimental implications, such as the magnetic field-induced-superconductivity.

Keywords

Vortex External Magnetic Field Vortex Structure Critical Current Regular Lattice 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • M. V. Milošević
    • 1
  • F. M. Peeters
    • 1
  1. 1.Departement FysicaUniversiteit Antwerpen (Campus Drie Eiken)AntwerpenBelgium

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