Title :
Write-field gradient effect on transition width in perpendicular recording media
Author :
Mochizuki, Masafumi ; Hara, Miki ; Nakamura, Atsushi ; Igarashi, Masukazu
Author_Institution :
Res. & Dev. Group, Hitachi Ltd., Tokyo, Japan
Abstract :
The effect of the write-field gradient on recording resolution and transition width was investigated using a micromagnetic simulation. The ultrahigh write-field gradient, which is greater than 1000 Oe/nm, produced a very small transition width. The effect of write-field gradient on recording resolution and transition width decreased with decreasing the distribution of the anisotropy field.
Keywords :
magnetic field effects; magnetic heads; micromagnetics; perpendicular magnetic recording; magnetic recording media; micromagnetic simulation; perpendicular magnetic recording; recording resolution; transition width; write field gradient effect; Anisotropic magnetoresistance; Elementary particle exchange interactions; Magnetic anisotropy; Magnetic recording; Magnetic separation; Magnetic shielding; Micromagnetics; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Magnetic recording media; micromagnetic simulation; perpendicular magnetic recording; write field gradient;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855317
