Title :
The effect of write head structures on written transitions in perpendicular media
Author :
Greaves, Simon ; Kanai, Yasushi ; Muraoka, Hiroaki
Author_Institution :
RIEC, Tohoku Univ., Sendai, Japan
Abstract :
Write heads with rectangular and crescent-shaped main poles were used for simulations of recording in perpendicular media. Transition curvature was reduced by using a crescent-shaped head, but the lower head-field gradient also reduced the signal-to-noise ratio (SNR). The addition of a trailing shield narrowed the difference in SNR between the two types of heads, whilst the track width was up to 3 nm narrower when written by a crescent-shaped head.
Keywords :
magnetic heads; magnetic recording noise; perpendicular magnetic recording; SNR; crescent-shaped head; head-field gradient; magnetic recording; perpendicular media; perpendicular recording; signal-to-noise ratio; write head structure; written transition; Anisotropic magnetoresistance; Delay; Finite element methods; Magnetic analysis; Magnetic heads; Magnetic recording; Magnetic separation; Micromagnetics; Perpendicular magnetic recording; Signal to noise ratio; Heads; magnetic recording; perpendicular media; simulation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855226
