Modeling of lamination effects for thin-film inductive heads

The impedance, efficiency, and current and field risetime for laminated heads have been calculated using our model developed earlier [1]. The calculated head impedance results are compared to the experimental data. The experiments have also shown that laminated heads performed better than the non-laminated heads in isolated pulse amplitude and overwrite at high frequencies under identical test conditions; however, the laminated heads did not show improved performance in PW50 and nonlinear transition shift (NLTS) under our test conditions.