BEHAVIOR OF A SYSTEM OF UNIAXIAL FERROPARTICLES 
IN A ROTATING LIQUID MATRIX

B. E. Kashevskii

UDC 532.584:538.6

Behavior of a system of single-domain ferromagnetic 
particles with easy-magnetization-axis-type magnetic anisotropy in 
a rotating fluid matrix is considered in a transverse magnetic field 
that is weak compared to the effective magnetic anisotropy field of 
a particle. The dynamics of a separate particle and orientational 
state of the system are considered with regard for Brownian rotational 
diffusion. It is found that a small deviation from the conventional 
rigid dipole model leads, at frequencies exceeding a certain critical 
value, to appearance of two attracting stationary states of the easiest 
magnetization axis that are situated in the plane perpendicular to 
the field and approach, with the growth of a particle, one or another 
direction of the matrix rotation axis. It is shown that this circumstance 
can radically change the behavior of a system of Brownian particles 
and, thus, magnetic and hydrodynamic properties of the ferrosuspension.

JEPTER74920199915
JEPTER7492015