A Challenge to Terabit Perpendicular Spinic Storage

A Multitrack Coding Scheme Designed for Perpendicular Recording Using Double Layer Medium and MR Head

“…The three code sequences are recorded to a medium through the each write head, simultaneously. The read-back signal of the coded patterns read from the medium is obtained by a wide track width read head over three tracks by way of DWCR (Dispersive Writing and Corrective Reading) [9] as shown in Fig. l…”

Design and recording simulation of 1Tbit/in2 patterned media

“…However, since the new method was mainly based on high preciseness of the lithography technology, the superiority of the method in areal density was soon overtaken by the advancement of conventional magnetic recording. At the same period, Nakamura [4] proposed a ''terabit spinic storage'', which stores bits per grain, indicating preferred perpendicular anisotropy in terms of magnetostatic interactions between bits, but with no suggestions for fabrication and design of the media. Reattention of patterned media in terms of thermal stability was made by White et al [5] in 1997 after the suggestion of thermal stability limit of conventional magnetic recording by Charap et al [6].…”

Magnetic force microscopy analysis of the micromagnetization mode of double-layered perpendicular magnetic recording media

“…[2][3][4][5][6][7][8][9][10][11] Through these studies, it has been clarified that the recording performance of the PMR medium in combination with the ring-type head can be improved by applying a thin underlayer between the PMR layer and substrate; furthermore, it was also pointed out that the overall read/write characteristics such as output voltage and reproduced waveform were widely changed due to the magnetic properties of the underlayers. 1,2 Although a single pole-type head, specially designed for the PMR system, is ideal to achieve an ultimately high recording density, 2 the combination with conventional ring-type heads are widely studied, featuring their high sensitivity in recording/reproducing processes as well as the simplicity of the system.…”