Theoretical and experimental approach to characteristic magnetic measurement data of polymer bonded soft magnetic composites

Soft magnetic composites consisting of an organic binder and FeCoV particles have been produced and examined afterward regarding the dependence of magnetic field H at polarization J on filler content C . In general, the applied magnetic field to achieve a certain value of polarization is proportional to the inverse filler content, following H ∼ 1 ∕ C , and the polarization is directly proportional to the filler content, following J ∼ C . With use of the evaluated material data and the inner demagnetization factor N i a model for calculating the permeability of soft magnetic composites has been derived. As input values the permeability of the soft magnetic particles μ , the filler content C , and the geometric demagnetization factor of the particles N p are used. The elaborated approach shows an excellent agreement with experimental permeability data of the FeCoV composites.