Identification of parameters in multilayer media

Multilayer media are of increasing importance as magneto-optic and perpendi cular media. The properties of successive layers evolve as the layers are e pitaxially deposited, This complicates both the model for these media and t he identification of the model parameters. In this paper, the effect of the variation of the Preisach model parameters is discussed and an identificat ion procedure is outlined. Reentrant-type hysteresis behavior, which is fou nd to be necessary in order to accurately fit both major loop and first-ord er reversal curves in these multilayer materials, is also considered.