High linear density study of advanced single-pole head

In this work, we present the general head design and magnetic recording performance of our second-generation advanced probe heads. These heads require as low as 5-mAo-p write currents for optimal recording. We demonstrate superior writeability via a series of overwrite (OW) and nonlinear transition shift (NLTS) saturation measurements. Excellent OW can be obtained with both high and low OW ratios. Media with VSM coercivities as high as 5500 Oe can be recorded with OW of 32 dB. We measured better than -12 dB of NLTS at a linear density of 1500 kfci. In this work, we present data where the magnetic read width (MRW) for the same read head is smaller when measured on perpendicular media compared to longitudinal media. We also show that the external field sensitivity of the advanced probe heads is excellent as larger than 32 and 23 Oe of external fields are required to erase a low-density signal on 3380- and 2200-Oe disks, respectively. Overall, the basic architecture of this advanced probe head is extendable to 0.12-μm write track-width, while we discover no remanence in the pole.