Kinetics of doublet formation in bicomponent magnetic suspensions: The role of the magnetic permeability anisotropy

M. T. Lopez-Lopez, F. Nogueras-Lara, L. Rodriguez-Arco, N. Guigo, N. Sbirrazzuoli, A. Yu. Zubarev, S. Lacis, and P. Kuzhir
Phys. Rev. E 96, 062604 – Published 7 December 2017

Abstract

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 external magnetic 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.

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  • Received 26 July 2017

DOI:https://doi.org/10.1103/PhysRevE.96.062604

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Fluid DynamicsCondensed Matter, Materials & Applied Physics

Authors & Affiliations

M. T. Lopez-Lopez1, F. Nogueras-Lara1, L. Rodriguez-Arco1, N. Guigo2, N. Sbirrazzuoli2, A. Yu. Zubarev3, S. Lacis4, and P. Kuzhir5,*

  • 1Department of Applied Physics, University of Granada, Campus de Fuentenueva, 18071 Granada, Spain
  • 2University of Côte d’Azur, CNRS UMR 7272, Institute of Chemistry of Nice, Parc Valrose, 06108 Nice, France
  • 3Department of Theoretical and Mathematical Physics, Urals Federal University, Lenina Avenue 51, 620083 Ekaterinburg, Russia
  • 4MMML Lab, Department of Physics, University of Latvia, Zellu Street 25, Riga LV-1002, Latvia
  • 5University of Côte d’Azur, CNRS UMR 7010, Institute of Physics of Nice (INΦNI), Parc Valrose, 06108 Nice, France

  • *Corresponding author: kuzhir@unice.fr

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Issue

Vol. 96, Iss. 6 — December 2017

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