Distribution of slanted write field for perpendicular recording heads with shielded pole

In this paper, the write field distribution for the perpendicular writer with and without shielded pole is investigated using 2D and 3D finite element methods (FEM). The slanted write fields due to shielded pole at the trailing edge and the leading edge of the main pole tip and the influence of the design parameters are analyzed in details. The analysis shows that the use of the shielded pole leads to change in the saturation levels in the main pole tip. As such, careful design is necessary to achieve optimal distribution of the slant field and maximum possible field amplitude that is limited by the saturation induction of the soft-magnet material of the pole tip.