Title :
SNR and density limit estimates: a comparison of longitudinal and perpendicular recording
Author :
Bertram, H.N. ; Williams, M.
Author_Institution :
Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA
Abstract :
Simplified Neel-Arrhenius analysis is utilized to determine limiting densities versus SNR for longitudinal and keepered-perpendicular media. Dominant transition noise is assumed and the effects of grain size distribution and storage above room temperature are included. Perpendicular recording potentially exhibits a higher density than longitudinal; for example, at SNR=20 dB, the limiting densities are approximately 500 and 100 Gbit/in2, respectively.
Keywords :
Neel temperature; grain size; magnetic recording noise; perpendicular magnetic recording; Neel-Arrhenius analysis; SNR; density limit; dominant transition noise; grain size distribution; keepered-perpendicular media; longitudinal recording; perpendicular recording; recording density; Acoustical engineering; Energy barrier; Grain size; Magnetic analysis; Magnetic recording; Magnetization; Noise shaping; Perpendicular magnetic recording; Signal to noise ratio; Temperature distribution;
Journal_Title :
Magnetics, IEEE Transactions on
