作者
Clécio C de Souza Silva, AV Silhanek, J Van de Vondel, W Gillijns, V Metlushko, B Ilic, VV Moshchalkov
发表日期
2007/3/16
期刊
Physical review letters
卷号
98
期号
11
页码范围
117005
出版商
American Physical Society
简介
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 magnetic force microscopy imaging, the magnetic state of both systems can be adjusted to produce arrays of almost pointlike 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 in the transport properties of this hybrid system.
引用总数
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