Magnetoviscosity of a Magnetic Fluid Based on Barium Hexaferrite Nanoplates

This paper presents the results of an experimental study of the influence of an external magnetic field on the shear flow behaviour of a magnetic fluid based on barium hexaferrite nanoplates. With the use of rheometry, the magnetoviscosity and field-dependent yield-stress in the fluid are evaluated. The observed fluid behaviour is compared to that of ferrofluids with magnetic nanoparticles having high dipole interaction. The results obtained supplement the so-far poorly studied topic of the influence of magnetic nanoparticles’ shape on magnetoviscous effects. It is concluded that the parameter determining the observed magnetoviscous effects in the fluid under study is the ratio V2/l3, where V is the volume of the nanoparticle and l is the size of the nanoparticle in the direction corresponding to its orientation in the externally applied magnetic field.

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Biodegradation of Nanoparticles in a Body from Mössbauer and Magnetization Measurements

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.190.725 ◽

2012 ◽

Vol 190 ◽

pp. 725-728 ◽

Cited By ~ 2

Author(s):

Mikhail Chuev ◽

Valery Cherepanov ◽

Maxim P. Nikitin ◽

Mikhail Polikarpov

Keyword(s):

Magnetic Field ◽

Experimental Data ◽

Magnetic Nanoparticles ◽

External Magnetic Field ◽

Chemical Transformation ◽

Living Organism ◽

Quantitative Information ◽

Spectral Shape ◽

Magnetization Curves ◽

Field Dependent

In order to extract a quantitative information about characteristics of the magnetic nanoparticles injected into a living organism one has to define a model of the magnetic dynamics in order to fit self-consistently the whole set of the experimental data, particularly, the evolution of Mössbauer spectral shape with temperature and external magnetic field as well as the magnetization curves. We have developed such a model and performed such an analysis of the temperature-and magnetic field-dependent spectra and magnetization curves of nanoparticles injected into a mice. This allowed us to reliably evaluate changes in the residual nanoparticles characteristics and their chemical transformation to paramagnetic ferritin-like forms in different mouses organs as a function of time after injection of nanoparticles. Actually, the approach allows one to quantitatively characterize biodegradation and biotransformation of magnetic nanoparticles injected into a body.

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A Thermofluid Analysis of the Magnetic Nanoparticles Enhanced Heating Effects in Tissues Embedded with Large Blood Vessel during Magnetic Fluid Hyperthermia

Journal of Nanoparticles ◽

10.1155/2016/6309231 ◽

2016 ◽

Vol 2016 ◽

pp. 1-18 ◽

Cited By ~ 8

Author(s):

Koustov Adhikary ◽

Moloy Banerjee

Keyword(s):

Magnetic Field ◽

Temperature Field ◽

Magnetic Nanoparticles ◽

External Magnetic Field ◽

Magnetic Fluid ◽

Strong Influence ◽

Proper Selection ◽

Magnetic Fluid Hyperthermia ◽

Linear Pattern ◽

Selection Of

The thermal effect developed due to the heating of magnetic nanoparticles (MNPs) in presence of external magnetic field can be precisely controlled by the proper selection of magnetic absorption properties of the MNPs. The present paper deals with the numerical simulation of temperature field developed within or outside the tumor, in the presence of an external alternating magnetic field, using a thermofluidic model developed using ANSYS FLUENT®. A three-layer nonuniform tissue structure with one or two blood vessels surrounding the tumor is considered for the present simulation. The results obtained clearly suggest that the volumetric distribution pattern of MNPs within the tumor has a strong influence on the temperature field developed. The linear pattern of volumetric distribution has a strong effect over the two other types of distribution considered herein. Various other important factors like external magnetic field intensity, frequency, vascular congestion, types of MNP material, and so forth are considered to find the influence on the temperature within the tumor. Results show that proper selection of these parameters has a strong influence on the desired therapeutic temperature range and thus it is of utmost importance from the efficacy point of view of magnetic fluid hyperthermia (MFH).

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Characterization of a magnetic fluid exposed to a shear flow and external magnetic field using small angle laser scattering

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2019.165959 ◽

2020 ◽

Vol 497 ◽

pp. 165959 ◽

Cited By ~ 2

Author(s):

D.Yu. Borin ◽

C. Bergmann ◽

S. Odenbach

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Shear Flow ◽

Magnetic Fluid ◽

Small Angle ◽

Laser Scattering

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Mittag–Leffler Function as an Approximant to the Concentrated Ferrofluid’s Magnetization Curve

Fractal and Fractional ◽

10.3390/fractalfract5040147 ◽

2021 ◽

Vol 5 (4) ◽

pp. 147

Author(s):

Petr A. Ryapolov ◽

Eugene B. Postnikov

Keyword(s):

Magnetic Field ◽

Magnetic Nanoparticles ◽

External Magnetic Field ◽

Magnetization Curve ◽

Force Fields ◽

Physical Characteristics ◽

Concentrated Solutions ◽

Static Magnetization ◽

Simple Tool ◽

Technical Systems

In this work, we show that the static magnetization curve of high-concentrated ferrofluids can be accurately approximated by the Mittag–Leffler function of the inverse external magnetic field. The dependence of the Mittag–Leffler function’s fractional index on physical characteristics of samples is analysed and its growth with the growing degree of system’s dilution is revealed. These results provide a certain background for revealing mechanisms of hindered fluctuations in concentrated solutions of strongly interacting of the magnetic nanoparticles as well as a simple tool for an explicit specification of macroscopic force fields in ferrofluid-based technical systems.

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Experimental Study on Oscillation of Single Spike of Magnetic Fluid under Vertical Alternating Magnetic Field.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.62.1343 ◽

1996 ◽

Vol 62 (596) ◽

pp. 1343-1349

Author(s):

Kyoichi ISOMURA ◽

Shuzo OSHIMA ◽

Ryuichiro YAMANE

Keyword(s):

Magnetic Field ◽

Experimental Study ◽

Magnetic Fluid ◽

Alternating Magnetic Field ◽

Single Spike

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Experimental study of the relaxation cycle of a decaying spheromak in an external magnetic field

Physics of Fluids B Plasma Physics ◽

10.1063/1.859711 ◽

1991 ◽

Vol 3 (6) ◽

pp. 1452-1460 ◽

Cited By ~ 10

Author(s):

Y. Ono ◽

M. Yamada ◽

A. C. Janos ◽

F. M. Levinton

Keyword(s):

Magnetic Field ◽

Experimental Study ◽

External Magnetic Field ◽

Relaxation Cycle

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Orientational Distributions of a Ferromagnetic Spherocylinder Particle in a Simple Shear Flow

Fluids Engineering ◽

10.1115/imece2002-32231 ◽

2002 ◽

Author(s):

Masayuki Aoshima ◽

Akira Satoh ◽

Geoff N. Coverdale ◽

Roy W. Chantrell

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Shear Flow ◽

Flow Field ◽

Simple Shear ◽

Applied Magnetic Field ◽

Spherical Particles ◽

Simple Shear Flow ◽

Microstructure Formation ◽

Base Liquid

A ferrofluid is a suspension of ferromagnetic spherical particles in a base liquid (1), and is well known as a functional fluid which responds to an external magnetic field to give a large increase in the viscosity. Such a significant increase in the viscosity is due to the fact that chain-like clusters are formed owing to magnetostatic interactions between particles in an applied magnetic field. The microstructure formation offers a large resistance to a flow field that gives rise to a significant increase of the apparent viscosity (2).

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