Magneto-viscosity of MnZn-ferrite ferrofluid

被引：17

作者：

Thirupathi, Gadipelly ^{[1
]}

Singh, Rajender ^{[1
]}

机构：

[1] Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, India

来源：

PHYSICA B-CONDENSED MATTER | 2014年 / 448卷

关键词：

Magneto-rheology; Magnetic nanoparticles; Ferrofluids; NANOPARTICLES;

D O I：

10.1016/j.physb.2014.03.042

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Mn0.75Zn0.25Fe2O4 (MZF) ferrofluid was synthesized using a precipitation method in ethylene glycol colloidal media. The x-ray diffraction and transmission electron microscope studies show nanophase of the M ultra fine nanoparticles. The magnetization (M) vs magnetic field (H) show zero coercivity and high saturation field characteristic of superparamagnetic behavior. The dynamic light scattering (DLS) data show the formation of aggregates or clusters with size distribution ranging from 50 to 600 nm. Magneto-viscosity of the ferrofluid is studied using rheological measurements under magnetic field up to 1.3 T. The behavior of shear rate vs effective shear viscosity (eta) plot in zero and higher magnetic field changes from non-Newtonian to Newtonian as shear rate increases. At a steady shear rate irreversible nonlinear behavior is observed in eta vs H plots. The data indicate the particle size distribution and formation of chains in the ferrofluid with increase in magnetic field. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：346 / 348

页数：3

共 11 条

[1] The size induced effect on rheological properties of Co-ferrite based ferrofluid [J].