Self-organization of dipolar hard spherical particles at low temperatures was studied using the Monte Carlo method. Configurations of the principal stable structures formed by the particles upon the destabilization of homogeneous distribution were described. The possibility of the formation of structural domains of different symmetries and sizes commensurate with the volume of the system under certain circumstances was demonstrated. The dipole moment of the domains thus formed is considerably higher than that of the entire system. The existence of dipole interactions in the model apparently leads to the appearance of layered structures. The results we obtained can be used in the development of biotechnologies involving the use of synthetic magnetic particles for targeted delivery of chemotherapeutics into an affected organ, as contrast agents in magnetic resonance imaging, and for the studies of magnitotaxis mechanisms.
64.70.Dv Solid-liquid transitions
64.75.+g Solubility, segregation, and mixing; phase separation
$^1$Department of Mechanics and Mathematics, Moscow State University, Moscow, 119991, Russia
$^2$Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 119991, Russia
$^3$Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, 119017, Russia
$^4$Center for the Study of Theoretical Problems of Chemical Pharmacology, Russian Academy of Sciences, Moscow, 119991, Russia