A MOVING PREISACH VECTOR HYSTERESIS MODEL FOR MAGNETIC RECORDING MEDIA

Two hysteresis models commonly used in numerical simulations of the recording process are the Preisach model and the particle assembly model. A combination of these models is presented which includes the mean field approach of the moving Preisach model. It is shown how the model can be tailored to enable an efficient numerical implementation. Comparison of the results with different experimental loops of a metal particle tape and a barium ferrite floppy disc reveals that this model has good vector properties and reproduces the different remanence loops well. The different interaction terms in the model are investigated separately. It is shown that the narrow switching field distribution of barium ferrite and the typical interaction phenomena reported by other authors can both be ascribed to a mean field interaction parallel to the particle axis. © 1990.