Vortex-antivortex dynamics and field-polarity-dependent flux creep in hybrid superconductor/ferromagnet nanostructures
- 22 August 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 72 (5) , 052507
Abstract
Vortex-antivortex arrays (VAA) 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 VAA. Creep of interstitial vortices is observed at low driving forces. This flux creep is strongly field-polarity dependent.Keywords
All Related Versions
This publication has 33 references indexed in Scilit:
- Pinning and creation of vortices in superconducting films by a magnetic dipolePhysical Review B, 2004
- A Superconducting Reversible Rectifier That Controls the Motion of Magnetic Flux QuantaScience, 2003
- The Little–Parks effect and multiquanta vortices in a hybrid superconductor–ferromagnet systemJournal of Physics: Condensed Matter, 2003
- Ratchet Cellular AutomataPhysical Review Letters, 2003
- Symmetry Locking and Commensurate Vortex Domain Formation in Periodic Pinning ArraysPhysical Review Letters, 2003
- Penetration of vortices into the ferromagnet/type-II superconductor bilayerPhysical Review B, 2003
- Topological Textures in a Ferromagnet-Superconductor BilayerPhysical Review Letters, 2001
- The spontaneous formation of a vortex structure in a type II superconductor-ferromagnet bilayerPhysics of the Solid State, 2001
- Flux pinning by regular arrays of ferromagnetic dotsPhysica C: Superconductivity and its Applications, 2000
- Superfast Vortex Creep inCrystals with Columnar Defects: Evidence for Variable-Range Vortex HoppingPhysical Review Letters, 1997