Resolution improvement of transition width with shielded pole writer

The resolution improvement of isolated magnetization transition with shielded pole writer was investigated with a two-dimensional (2-D) finite-element method (FEM) calculation using a media model. Two kinds of single-pole type (SPT) head were used in the calculation. The medium coercivity was varied from 3000 Oe to 9000 Oe. The transition parameter /spl pi/a was improved from 56.80 nm (Hc=3000 Oe) to 7.14 nm (Hc=9000 Oe) using the regular SPT head, however a significant reduction was achieved from 26.32 nm (Hc=3000 Oe) to 5.26 nm (Hc=9000 Oe) using the front yoke head with high gradient. The recording resolution can be improved with the front yoke head for a large range of media.