Thermal stability and read-write performance of AFC media

Author

Akagi, F. ; Igarashi, M.

Author_Institution

Central Res. Lab., Hitachi Ltd., Tokyo, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

1934

Lastpage

1936

Abstract

The effect of the magnetic properties of the lower layer, of the antiferromagnetically coupled (AFC) media on thermal stability and the signal-to-noise ratio (S_1F/N_d2F) was studied using a Monte-Carlo simulation and the Langevin equation. Thermal stability was the highest when the largest M_s2 value was used within the limits of achieving antiferromagnetic coupling between the magnetic layers, and when the value K_u2 was less than the value of the upper layer. S_1F/N_d2F increased linearly with a decrease in the anisotropy field H_k2 at the rate of 0.5 dB per 100 kA/m.

Keywords

Monte Carlo methods; antiferromagnetic materials; exchange interactions (electron); grain size; magnetic anisotropy; magnetic hysteresis; magnetic multilayers; magnetic recording noise; thermal stability; Langevin equation; M-H loop; Monte-Carlo simulation; anisotropy field; antiferromagnetically coupled media; exchange constant; grain size reduction; longitudinal media; magnetic layers; read-write performance; signal-to-noise ratio; thermal stability; Anisotropic magnetoresistance; Antiferromagnetic materials; Automatic frequency control; Couplings; Equations; Magnetic anisotropy; Magnetic properties; Perpendicular magnetic anisotropy; Signal to noise ratio; Thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802853

Filename

1042049