Aggregation of magnetic microspheres : experiments and simulation
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Abstract
Uniformly sized microspheres interacting via long-range magnetic dipolar forces are used to study diffusion-limited cluster aggregation in a plane. The results show that it is possible to scale the temporal evolution of the cluster size distribution and that there is a crossover in fractal dimension from D =1.52 ± 0.05 to D =1.16 ± 0.05 in the limit of weak and strong dipolar coupling. External magnetic fields are shown to produce pronounced chaining with D approaching 1. The results compare fa ...
Uniformly sized microspheres interacting via long-range magnetic dipolar forces are used to study diffusion-limited cluster aggregation in a plane. The results show that it is possible to scale the temporal evolution of the cluster size distribution and that there is a crossover in fractal dimension from D =1.52 ± 0.05 to D =1.16 ± 0.05 in the limit of weak and strong dipolar coupling. External magnetic fields are shown to produce pronounced chaining with D approaching 1. The results compare favorably with computer simulations of aggregation of the same type of particles. ...
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Physical Review Letters. Woodbury. Vol. 61, no. 15 (Oct. 1988), p. 1736-1739
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Artigos de Periódicos (39039)Ciências Exatas e da Terra (5930)
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