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.

arXiv comment9 pages, 13 figures, to appear in Phys. Rev. E (2013)

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Cited by in corpus (8)

• Transport coefficients for a confined Brownian ratchet operating between two heat reservoirs
• Orientational Ordering, Buckling, and Dynamic Transitions for Vortices Interacting with a Periodic Quasi-One Dimensional Substrate
• Active Matter in Lateral Parabolic Confinement: From Subdiffusion to Superdiffusion
• Magnetic particles confined in a modulated channel: structural transitions tunable by tilting a magnetic field
• Avalanches, Plasticity, and Ordering in Colloidal Crystals Under Compression
• Single-file and normal diffusion of magnetic colloids in modulated channels
• Evolution equation for tagged particle density and correlations in single file diffusion
• Self-assembled clusters of magnetically tilted dipoles