Title :
Longitudinal recording at 10 to 20 Gbit/inch2 and beyond
Author_Institution :
Seagate Technol. Recording Media, Freemont, CA, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
It is a common understanding that superparamagnetic effects will eventually limit the maximum recording density of magnetic hard disk recording. This contribution reviews the theoretical concepts of noise in magnetic recording as well as the concepts of thermally activated magnetization reversal, The theoretical results are contrasted with experimental data. The findings clearly indicate that at some point, signal-to-noise ratio has to be compromised with the thermal stability of the written information
Keywords :
hard discs; magnetic recording noise; magnetisation reversal; magnetocaloric effects; reviews; superparamagnetism; thermal stability; longitudinal recording; magnetic hard disk recording; magnetic recording; maximum recording density; noise; review; signal-to-noise ratio; superparamagnetic effects; thermal stability; thermally activated magnetization reversal; written information; Energy barrier; Equations; Grain size; Jitter; Magnetic anisotropy; Magnetic domains; Magnetic recording; Magnetization; Perpendicular magnetic anisotropy; Shape;
Journal_Title :
Magnetics, IEEE Transactions on
