DocumentCode :
3141913
Title :
Low noise mechanism in exchange coupled perpendicular recording media
Author :
Honda N ; Komakine, T. ; Ouchi, K.
Author_Institution :
Akita Res. Inst. of Adv. Technol., Japan
fYear :
2003
fDate :
6-8 Jan. 2003
Firstpage :
26
Abstract :
Perpendicular magnetic recording is one of the most promising systems for ultra-high density recording beyond 200 Gbit/in/sup 2/. 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.
Keywords :
digital magnetic recording; magnetic recording noise; perpendicular magnetic recording; storage media; M-H loop slopes; double layered recording media; exchange coupled perpendicular recording media; jitter; low noise mechanism; magnetic domain size; recording media noise; recording resolution; simulation; transition noise; ultra-high density recording; Analytical models; Couplings; Jitter; Magnetic analysis; Magnetic domains; Magnetic heads; Magnetic noise; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Joint NAPMRC 2003. Digest of Technical Papers [Perpendicular Magnetic Recording Conference]
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-7746-X
Type :
conf
DOI :
10.1109/NAPMRC.2003.1177030
Filename :
1177030
Link To Document :
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