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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/137960
Giant transversal particle diffusion in a longitudinal magnetic ratchet
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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 μ m 2 / 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 theoretical interpretation in terms of random disorder effects within the magnetic film.
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TIERNO, Pietro, et al. Giant transversal particle diffusion in a longitudinal magnetic ratchet. Physical Review Letters. 2010. Vol. 105, num. 23, pags. 230602. ISSN 0031-9007. [consulted: 6 of June of 2026]. Available at: https://hdl.handle.net/2445/137960