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Dipole-induced vortex ratchets in superconducting films with arrays of micromagnets | | C. C. de Souza Silva
; A. V. Silhanek
; J. Van de Vondel
; W. Gillijns
; V. Metlushko
; B. Ilic
; V. V. Moshchalkov
; | | Date: |
18 Jan 2007 | | Subject: | Superconductivity | | Abstract: | We investigate the transport properties of superconducting films with periodic arrays of in-plane magnetized micromagnets. Two different magnetic textures are studied: a square array of magnetic bars and a close-packed array of triangular microrings. As confirmed by MFM imaging, the magnetic state of both systems can be adjusted to produce arrays of almost point-like magnetic dipoles. By carrying out transport measurements with ac drive, we observed experimentally a recently predicted ratchet effect induced by the interaction between superconducting vortices and the magnetic dipoles. Moreover, we find that these magnetic textures produce vortex-antivortex patterns, which have a crucial role on the transport properties of this hybrid system. | | Source: | arXiv, cond-mat/0701445 | | Other source: | [GID 587614] pmid17501080 | | Services: | Forum | Review | PDF | Favorites | |
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