IDENTIFICATION OF MAGNETIC AFTEREFFECT MODEL PARAMETERS - TEMPERATURE-DEPENDENCE

Recently, several aftereffect models were proposed in which Preisach t ype hysteresis transducers are driven by stochastic inputs. Such input s represent random thermal perturbations which are the source of the a ftereffect phenomenon. According to these models, aftereffect is compl etely characterized by the magnetisation history, the Preisach functio n and noise parameters. In this article, we present an identification of model parameters in which temperature-dependence is incorporated in to the aftereffect model. The temperature variation of the noise param eters are investigated in order to predict the aftereffect decay coeff icient. Comparison of numerical results with experimental ones observe d in metal particle tape (MPT) magnetic recording media show a good ag reement. As a result, based on the magnetization history, the Preisach function and noise parameters, it is shown that the model can be used to predict aftereffect characteristics of magnetic recording media of arbitrary magnetization history and temperature.