HIGH-DENSITY RECORDING CHARACTERIZATION USING A MERGED MR HEAD AND A DUAL-LAYER PERPENDICULAR DISK

The combination of a merged MR head and a dual-layer perpendicular dis k is a promising technology for future high-density recording, High-de nsity recording using this combination was characterized to obtain a D -50 of 98 kFCI for read operations, a D-50 of 80 kFCI for write operat ions, and an overwrite of 50 dB, and the results were compared with th ose for longitudinal recording, Higher-density recording is expected t o be achieved by optimizing the shield gap length in the read element, the pole thickness in the write element, and the Ms value of a disk.