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Title: Giant transversal particle diffusion in a longitudinal magnetic ratchet
Author: Tierno, Pietro
Reimann, Peter
Johansen, Tom H.
Sagués i Mestre, Francesc
Keywords: Física de partícules
Particle physics
Issue Date: 1-Dec-2010
Publisher: American Physical Society
Abstract: 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.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2010, vol. 105, num. 23, p. 230602
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)
Articles publicats en revistes (Ciència dels Materials i Química Física)

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