Dipole-induced vortex ratchets in superconducting films with arrays of micromagnets.

@article{Silva2007DipoleinducedVR,
  title={Dipole-induced vortex ratchets in superconducting films with arrays of micromagnets.},
  author={Cl{\'e}cio C de Souza Silva and Alejandro V. Silhanek and Joris Van de Vondel and Werner Gillijns and V. Metlushko and Bojan Ili{\'c} and V. V. Moshchalkov},
  journal={Physical review letters},
  year={2007},
  volume={98 11},
  pages={
          117005
        }
}
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… CONTINUE READING

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