It is shown that the addition of Dy~(3+) improves saturation magnetic intensity of ferrite magnetic fluids, which reaches the maximum when the amount of Dy~(3+) is n(Fe)∶n(Dy~(3+))≈30∶1.
The ideal MHD normal mode equations for axisymmetric plasmas can be significantly simplified in two limiting cases:ω~2《k_1~2 c_3~2 or ω~2》k_1~2 c_3~2(k_1 is the longitudinal wave number,c_3 the sound wave velocity).
The Fe3O4 magnetic fluid was obtained by one-step method with the W/O microemulsion as microreactor to synthesize magnetic nanoparticles (reaction temperature was 30 °C and reaction time was 5 h) and kerosene as carrier liquid.
Structural transformations and relevant changes in the magnetic and optical properties of magnetosensitive emulsions based on magnetic fluids are experimentally studied.
Relations for the magnetization and the magnetic susceptibility of a ferrofluid and also for the permittivity of a polar liquid taking into account interparticle correlations with an accuracy of terms ~Ud2 were derived.
These currents penetrate into the conductive region with anisotropic conductivity of the D- and E-layers of the ionosphere, being transformed to a MHD-wave that propagates into the magnetosphere.
Based on this solution, the form and spectrum of the generated MHD signal are calculated for Alfvenic and magnetosonic modes coming out to the ionosphere and magnetosphere.
The hypothesis on a similar MHD pulse allows one to explain in a semiquantitative way the short burst of electron field-aligned acceleration observed by the DE-2 satellite over the Debbie hurricane.
One-dimensional MHD simulations of solitary sharp and strong disturbances (impulses) of the interplanetary magnetic field and plasma of the homogeneous solar wind were performed.