Microdynamics of Magnetic Particles Dispersed in Complex Media

نویسنده

  • MODESTO T. LÓPEZ-LÓPEZ
چکیده

The aggregation of magnetic particles in the presence of a magnetic field is the basic phenomenon which underlies all the physics of magnetorheological (MR) fluids. Although these interactions are well understood when the suspending fluid is a simple liquid, new MR fluids based on dispersion of magnetic microparticles in a ferrofluid or MR elastomers based on dispersion of magnetic particles in a rubber matrix, present some unusual properties which are not well described by conventional theories. We analyze in this work the motion of magnetic particles dispersed in a ferrofluid and submitted to a magnetic field and discuss the possible applications.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ساخت و بررسی خواص مغناطیسی نانوذرات فریت منگنزخالص (MnFe2O3) و آلایش داده شده در ماتریس سیلیکا

 In this study, the pure manganese ferrite nanoparticles and those dispersed in silica were prepared by the sol-gel method. The average size of particles, which is estimated from Scherrer formula, is about 6 nm for pure sample and 5 nm for silica dispersed sample. The particles size values are in agreement with the TEM results. Results of magnetization measurements showed that these samples hav...

متن کامل

Magnetic Studies of Fine Fe And Co Species Formed in Fe/Zeolite Catalysts

Magnetic, Mössbauer, and I.R. studies of nanosize particles of Fe and Co species dispersed in a cage of aluminosilicates structure, in relation to syngas (CO+H2) Fischer Tropsch conversion. The difference in the catalytic activity of such species have shown dependancy on their degree of dispersion. The carbonyl impregnation gave ultra-fine Super Paramagnetic Fe3O4, whereas the nitrate impregnat...

متن کامل

مشخصه های آماری ذرات ضبط مغناطیسی

  In magnetic recording media, the remanent magnetization loop, Mr(H)has some parameters, which explain the prperties of the medium in view of the storage density and signal-to-noise ratio. It is necessary to find the mechanism of Mr variations from the statistical characteristics of the system. We have prepared samples of single-domain ascicolar iron particles with 0.3 length, and the oriented...

متن کامل

PARTICULATE FILMS FOR MAGNETO·OPTICAL RECORDING I. THEORY OF THE MAGNETO·OPTICAL EFFECT M. ABE and M. GOMI

For magneto-optical(MO) recording media we propose particulate films with magnetic fine particles dispersed in binders. Using effective dielectric tensor Faraday rotation ~ and absorption coefficient -a-are calculated for the particulate films containing Bi-substituted YIG and Co fine particles. The MO figure of merit O'~ of the particulate films exceeds that of continuous magnetic films. This ...

متن کامل

Affinity Based Nano-Magnetic Particles for Purification of Recombinant Proteins in Form of Inclusion Body

Background: Protein purification is the most complicated issue in the downstream processes of recombinant protein production; therefore, improved selective purification methods are important. Affinity-based protein purification method using His-tag and Ni-NTA resins is one of the most common strategies. MNPs can be used as a beneficial alternative for Ni-NTA resins. However, there is no data on...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2013