Modeling and analysis of overwrite behavior versus increasing head field in thin MP tape

A thin MP tape is modeled to study the overwrite behavior as a function of increasing head field. For the simulation we use a moving-Preisach and Ston er-Wohlfarth hysteresis model which is implemented in a numerical recording model. A measurement at the optimum current of the overwrite ratio (OWR) s hows a perfect reproduction of its value in the simulation. A layer-by-laye r depth analysis is performed to investigate the origin of the residual sig nal. The model can also explain the decreasing trend of the OWR versus the head field. (C) 1999 Elsevier Science B.V. All rights reserved.