Giant transversal particle diffusion in a longitudinal magnetic ratchet.

@article{Tierno2010GiantTP,
  title={Giant transversal particle diffusion in a longitudinal magnetic ratchet.},
  author={Pietro Tierno and Peter Reimann and Tom H. Johansen and Francesc Sagu{\'e}s},
  journal={Physical review letters},
  year={2010},
  volume={105 23},
  pages={230602}
}
We study the transversal motion of paramagnetic particles on a uniaxial garnet film, exhibiting a longitudinal ratchet effect in the presence of an oscillating magnetic field. Without the field, the thermal diffusion coefficient obtained by video microscopy is D(0) ≈ 3 × 10(-4)  μm2/s. With the field, the transversal diffusion exhibits a giant enhancement by almost four decades and a pronounced maximum as a function of the driving frequency. We explain the experimental findings with a… CONTINUE READING

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