title: Cluster-cluster aggregations of superparamagnetic particles in a rotational magnetic field.
abstract: We investigate the cluster-cluster aggregations of superparamagnetic particles in a rotational magnetic field numerically by the Brownian dynamics method, focusing on the cases of ϕ = 0.01 and 0.03 and Ma = 0, 0.001, 0.01, and 0.1, where ϕ is the area fraction of superparamagnetic particles and Ma is the Mason number, i.e., the ratio of viscous drag to magnetic force acting on a magnetic particle. We clarify the effect of ϕ and Ma on the cluster-cluster aggregation process from the point of view of dynamic scaling law.
authors.affiliation: Bio-Nano Electronics Research Centre, Toyo University, Kawagoe, Saitama, Japan.
authors.forename: Tomofumi
authors.initials: T
authors.lastname: Ukai
authors.forename: Hisao
authors.initials: H
authors.lastname: Morimoto
authors.forename: Toru
authors.initials: T
authors.lastname: Maekawa
mesh_terms: D060526:Magnetic Fields; D059346:Magnets; D008962:Models, Theoretical; D012212:Rheology; D012399:Rotation; D013997:Time Factors