Equilibrium properties of magnetic filament suspensions

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:470

Article; Proceedings Paper

Kuznetsov, Andrey A.^1,2 

[1] Inst Continuous Media Mech UB RAS, Ac Koroleva St 1, Perm 614013, Russia

[2] Perm State Univ, Bukireva St 15, Perm 614990, Russia

关键词: Magnetic filaments;    Nanochains;    Ferrofluid;    Magnetic susceptibility;    Sedimentation equilibrium;   

DOI  :  10.1016/j.jmmm.2017.10.091

来源: Elsevier

【 摘 要 】

Langevin dynamics is used to study equilibrium properties of the suspension of magnetic filaments (chains of nanoparticles permanently crosslinked with polymers). It is shown that the filament suspension generally has a larger magnetic susceptibility than the system of unlinked nanoparticles with the same average particle concentration. However, actual susceptibility gain strongly depends on length and flexibility of filaments. It is also shown that in a strong gravitational (centrifugal) field sedimentation profiles of filaments are less homogeneous than that of unlinked particles. The spatial distribution of filaments weakly depends on the intensity of interparticle dipole-dipole interactions. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free