Kinetics of doublet formation in bicomponent magnetic suspensions: The role of the magnetic permeability anisotropy Nogueras-Lara, Francisco Rodríguez Arco, Laura Guigo, N. Sbirrazzuoli, N. Zubarev, Andrey Lacis, Sandris Kuzhir, P. López López, Modesto Torcuato Micron-sized particles (microbeads) dispersed in a suspension of magnetic nanoparticles, i.e., ferrofluids, can be assembled into different types of structures upon application of an externalmagnetic field. This paper is devoted to theoretical modeling of a relative motion of a pair of microbeads (either soft ferromagnetic or diamagnetic) in the ferrofluid under the action of applied uniform magnetic field which induces magnetic moments in the microbeads making them attracting to each other. The model is based on a point-dipole approximation for the magnetic interactions between microbeads mediated by the ferrofluid; however, the ferrofluid is considered to possess an anisotropic magnetic permeability thanks to field-induced structuring of its nanoparticles. The model is tested against experimental results and shows generally better agreement with experiments than the model considering isotropic magnetic permeability of ferrofluids. The results could be useful for understanding kinetics of aggregation of microbeads suspended in a ferrofluid. From a broader perspective, the present study is believed to contribute to a general understanding of particle behaviors in anisotropic media. 2021-04-06T06:45:09Z 2021-04-06T06:45:09Z 2017 info:eu-repo/semantics/article PHYSICAL REVIEW E 96, 062604 (2017) http://hdl.handle.net/10481/67794 10.1103/PhysRevE.96.062604 eng info:eu-repo/semantics/openAccess