Percolation and orientational ordering in systems of magnetic nanorods

Details Percolation and orientational ordering in systems of magnetic nanorods Percolation and orientational ordering in systems of magnetic nanorods

2012-03-21

arxiv.org/abs/1203.4707v1

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 12 figures

Scientific paper

Based on Monte Carlo (MC) computer simulations we study the structure formation of a system of magnetic nanorods. Our model particles consist of fused spheres with permanent magnetic dipole moments, as inspired by recent experiments. The resulting system behaves significantly different from a system of hard (non-magnetic) rods or magnetic rods with a single longitudinal dipole. In particular, we observe for the magnetic nanorods a significant decrease of the percolation threshold (as compared to non-magnetic rods) at low densities, and a stabilization of the high-density nematic phase. Moreover, the percolation threshold is tunable by an external magnetic field.

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