Conference Proceeding

Low noise mechanism in exchange coupled perpendicular recording media

Akita Res. Inst. of Adv. Technol., Japan;
02/2003; DOI:10.1109/NAPMRC.2003.1177030 ISBN: 0-7803-7746-X pp.26- In proceeding of: Joint NAPMRC 2003. Digest of Technical Papers [Perpendicular Magnetic Recording Conference 2003]
Source: IEEE Xplore

ABSTRACT Summary form only given. Perpendicular magnetic recording is one of the most promising systems for ultra-high density recording beyond 200 Gbit/in2. Steeper M-H loop slopes of the recording media are indispensable for obtaining a high recording resolution. Introduction of exchange coupling between the adjacent grains in the media is also effective in increasing the loop slope. However, increased exchange coupling generally causes enhanced medium noise due to increased magnetic domain size in the media. On the other hand, the dominant medium noise in double layered perpendicular recording media is the transition noise caused by jitter at the transitions. In this case, the noise could be small when a sharp transition is formed. Therefore, it would be possible to realize low noise media with a high resolution in perpendicular recording media. The low noise mechanism was studied using a simulation analysis.

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Keywords

adjacent grains
 
dominant medium noise
 
double layered perpendicular recording media
 
exchange coupling
 
jitter
 
loop slope
 
low noise media
 
media
 
medium noise
 
Perpendicular magnetic recording
 
perpendicular recording media
 
promising systems
 
recording media
 
recording resolution
 
simulation analysis
 
Steeper M-H loop slopes
 
Summary form
 
ultra-high density recording