Time scaling regimes in aggregation of magnetic dipolar particles: Scattering dichroism results - art. no. 115501

We report experimental results on the aggregation kinetics in magnetorheolo gical fluids subject to a constant uniaxial magnetic field using the techni que of scattering dichroism. We show that the number of aggregated particle s displays a long-time power-law dependence with exponents that correspond to two different aggregation regimes. These regimes coincide with 3D and 1D -like aggregation. We also derive the values of both time exponents for the number of aggregated particles.