Tunable diffusion of magnetic particles in a quasi-one-dimensional channel

D. Lucena, W. P. Ferreira, F. F. Munarin, G. A. Farias, and F. M. Peeters
Phys. Rev. E 87, 012307 – Published 14 January 2013

Abstract

The diffusion of a system of ferromagnetic dipoles confined in a quasi-one-dimensional parabolic trap is studied using Brownian dynamics simulations. We show that the dynamics of the system is tunable by an in-plane external homogeneous magnetic field. For a strong applied magnetic field, we find that the mobility of the system, the exponent of diffusion, and the crossover time among different diffusion regimes can be tuned by the orientation of the magnetic field. For weak magnetic fields, the exponent of diffusion in the subdiffusive regime is independent of the orientation of the external field.

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  • Received 27 September 2012

DOI:https://doi.org/10.1103/PhysRevE.87.012307

©2013 American Physical Society

Authors & Affiliations

D. Lucena1,2,*, W. P. Ferreira1,†, F. F. Munarin1, G. A. Farias1, and F. M. Peeters2,1,‡

  • 1Departamento de Física, Universidade Federal do Ceará, Caixa Postal 6030, Campus do Pici, 60455-760 Fortaleza, Ceará, Brazil
  • 2Department of Physics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium

  • *diego@fisica.ufc.br
  • wandemberg@fisica.ufc.br
  • francois.peeters@ua.ac.be

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Vol. 87, Iss. 1 — January 2013

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