Reva V. Statistical properties of ferromagnetic nanoparticles systems with frozen magnetic moments

The research is devoted to the response of ensembles of ferromagnetic nanoparticles suspended in a liquid to an external periodic field. In particular, the effect of the thermal bath and inter-particle interaction on the power loss is studied in detail, and also the effect of the thermal bath on the transport properties of particles under the synchronized action of a periodic force and field, whose vector oscillates. It is analytically and numerically demonstrated that the action of the thermostat leads to a decrease in power losses, while for low frequencies this decrease is significant, and for large - almost no. The simulation shows that the interaction due to several mechanisms corrects the action of the thermostat both in the direction of increase and in the direction of decrease in power losses. Using the developed methodology, the developed earlier statistical theory of nanoparticle drift is numerically verified, which takes into account both the temperature dependence of the dynamic viscosity of the liquid and thermal fluctuations.