Modeling neighborhood-induced transition shift in perpendicular media with a soft underlayer

This paper describes how dc off-track regions in perpendicular media cause transition shift and track-width broadening. Fields from these regions modulate the applied head field, giving rise to shifts in the positions where the transitions are recorded. The amount of shift depends on the write field gradient at the coercivity, is proportional to the remanent magnetization of the media, and increases with decreasing track pitch. A Poisson solver will be used to obtain the fields and a vector coercivity media model will be used to find the shifts.