Abstract
Diffusion of two-dimensional (2D) superparamagnetic dust grains interacting via both Yukawa and magnetic dipole-dipole interactions is investigated based on the Langevin dynamics simulation. The magnetic dipole moment, induced by the external magnetic field, is tilted at angle α relative to the 2D layer. It is demonstrated that the system in the liquidlike state behaves in anisotropic diffusion when α is larger than the agglomeration threshold, and the anisotropic diffusions are identified as the normal type. The anisotropy degree depends on the strength of magnetic dipole-dipole interaction and tilt angle of the magnetic dipole moment. An empirical law describing the anisotropy degree as a function of α is given.
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