Interaction fields evaluation in fine particle systems

A computer simulation model for estimation of the interaction fields in fine particle systems has been developed. The method uses the experimental /spl delta/M/sub a/(H) plot, constructed from the Fourier description of the initial magnetization curve and the hysteresis loop, and the /spl delta/M(H) plot, obtained from the remanence curves. The dependencies of the interaction fields on the external magnetic field have been obtained from the experimental data for a sample of a Ba-ferrite fine powder.