Modeling assessment of the side writing properties of a notch write head

The side writing properties of a notch write head is studied via 3-D finite element method modeling. The head field properties are characterized by the erase width, track edge write gradient, and edge transition shift position. The calculated head field of the notch head are compared to the calculated values for a trimmed and merged head. The results show a significant decrease in the erase width at small notch depths of less than 1 gap length. However, the improved edge transition profiles associated with the trimmed head are not realized until the notch depth exceeds approximately 2 gap lengths