The organic magnetics offer a new opportunity for tailoring the device
s with required magnetic, electrical, mechanical and chemical properti
es for special applications. In this paper are presented two-component
composite polymers prepared from soft magnetic filler (Fe, MnZn ferri
te) in the polymer matrix. The emphasis in study was given to the infl
uence of the particle size distribution of the filler, on the magnetic
properties and the estimation of this properties of the composite usi
ng the model and the measurement verification.