Energy Dissipation in a Solid Dispersion System of Single-Domain Ferromagnetic Particles under the Action of a Variable Linearly Polarized Field

The heat power released as a result of magnetic hysteresis in a system of small ferromagnetic particles suspended in a solid matrix acted upon by a linearly polarized magnetic field has been determined theoretically and experimentally. The calculations were done with the use of a model of noninteracting, uniformly magnetized particles with uniaxial anisotropy. Acicular particles of gamma iron oxide were used in the experiments. It is shown that the heat power released as a result of magnetic hysteresis may measure several megawatts per cubic meter, which makes it possible to use disperse magnetic systems as volumetric heaters.[PUBLICATION ABSTRACT]