Phys. Rev. B 77, 134510 (2008) [5 pages]Switchable collective pinning of flux quanta using magnetic vortex arrays: Experiments on square arrays of Co dots on thin superconducting filmsReceived 6 December 2007; revised 17 March 2008; published 16 April 2008 We constructed a superconducting/ferromagnetic hybrid system in which the ordering of the pinning potential landscape for flux quanta can be manipulated. Flux pinning is induced by an array of magnetic nanodots in the “magnetic vortex” state and is controlled by the magnetic history. This allows switching on and off the collective pinning of the flux lattice. In addition, we observed field-induced superconductivity that originates from the annihilation of flux quanta induced by the stray fields from the magnetic vortices. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.134510
DOI:
10.1103/PhysRevB.77.134510
PACS:
74.25.Qt, 74.78.Na, 75.75.+a
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