Title :
Intergranular exchange pinning effects in perpendicular recording media
Author :
Greaves, S.J. ; Muraoka, H. ; Sugita, Y. ; Nakamura, Yoshihiko
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
In a simulation of perpendicular recording media, the exchange coupling between adjacent cells was broken at random to provide domain wall pinning sites. The introduction of such pinning sites can improve the signal/noise ratio of strongly exchange coupled media by reducing the susceptibility of the media to stray fields and thus reducing unwanted erasure of recorded data
Keywords :
exchange interactions (electron); magnetic domain walls; magnetic recording noise; perpendicular magnetic recording; data erasure; domain wall pinning; exchange coupling; intergranular exchange pinning; perpendicular recording medium; signal/noise ratio; simulation; stray field; Anisotropic magnetoresistance; Equations; Fluctuations; Magnetic heads; Magnetic moments; Noise shaping; Perpendicular magnetic recording; Random media; Saturation magnetization; Signal to noise ratio;
Journal_Title :
Magnetics, IEEE Transactions on
