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

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.

9 pages, 13 figures, to appear in Phys. Rev. E (2013)

References in corpus (6)

• Lane reduction in driven 2d-colloidal systems through microchannels
• Langevin formulation for single-file diffusion
• Effective Edwards-Wilkinson equation for single-file diffusion
• Structural and dynamical properties of a quasi-one-dimensional classical binary system
• The dynamics of colloids in a narrow channel driven by a non-uniform force
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Cited by in corpus (2)

• Transport coefficients for a confined Brownian ratchet operating between two heat reservoirs
• Active Matter in Lateral Parabolic Confinement: From Subdiffusion to Superdiffusion