High linear density study of advanced single pole head

Summary form only given. As medium coercivity continues to increase we believe that perpendicular recording will enable us to continue increasing the areal density in the future due to the imaging effect of the soft underlayer of the recording medium. We have previously shown that very high, linear densities can be achieved in perpendicular recording, thus enabling higher bit-aspect-ratio recording systems than that of conventional longitudinal recording systems (F. Liu et al., TMRC 2001). Compared to results for ring heads, modeling results show that higher write field and sharper write field gradients can be generated with single pole heads on perpendicular media with soft under-layers. In this paper, we study the performance of single pole heads for perpendicular recording at ultra high linear density.