Title :
SNR improvements for advanced longitudinal recording media
Author :
Acharya, B. Ramamurthy ; Abarra, E. Noel ; Okamoto, Iwao
Author_Institution :
Storage Syst. Lab., Fujitsu Labs., Atsugi, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
Schemes for SNR enhancement for advanced longitudinal recording media are discussed. SNR improvement is obtained by utilizing a bi-magnetic layer media, where the initial magnetic layer has lower magnetization, coercivity, and magnetic anisotropy, in comparison to the top magnetic layer. Further improvements in SNR and thermal stability are achieved using synthetic ferrimagnetic media. The selection of proper thickness and composition of the initial magnetic layer is important for the high performance of the synthetic ferrimagnetic media
Keywords :
coercive force; digital magnetic recording; ferrimagnetic materials; hard discs; magnetic anisotropy; magnetic multilayers; magnetic recording noise; thermal stability; SNR enhancement schemes; SNR improvements; advanced longitudinal recording media; bi-magnetic layer media; coercivity; high density recording; initial layer composition selection; initial layer thickness selection; initial magnetic layer; magnetic anisotropy; magnetization; synthetic ferrimagnetic media; thermal stability; Coercive force; Disk recording; Ferrimagnetic materials; Grain size; Magnetic anisotropy; Magnetic recording; Magnetization; Perpendicular magnetic anisotropy; Signal to noise ratio; Thermal stability;
Journal_Title :
Magnetics, IEEE Transactions on
