Title :
Longitudinal recording media performance as a function of exchange, linear recording density and media texture
Author :
Chubykalo, O. ; Lengsfield, B. ; Jones, B.
Author_Institution :
IBM Almaden Res. Center, San Jose, CA, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
The traditional view of the longitudinal magnetic recording media is that optimal signal-to-noise (SNR) is obtained by diminishing intergranular exchange coupling. In the present work the influence of the exchange has been investigated in a realistic media with log-normal distribution of columnar grains (modeled by optimized Voronoi polyhedral) for different linear recording densities and media texture. A more realistic exchange model (surface exchange between the neighboring grains and volume exchange inside a grain) has been employed. The data suggest that some exchange can be present in the system without sacrificing SNR
Keywords :
exchange interactions (electron); grain size; log normal distribution; magnetic recording noise; texture; Voronoi polyhedra; columnar grain size; intergranular exchange coupling; linear density; log-normal distribution; longitudinal magnetic recording medium; micromagnetic model; signal-to-noise ratio; texture; Couplings; Grain size; Log-normal distribution; Magnetic anisotropy; Magnetic heads; Magnetic recording; Micromagnetics; Perpendicular magnetic anisotropy; Saturation magnetization; Signal to noise ratio;
Journal_Title :
Magnetics, IEEE Transactions on
