Effects of the exchange stiffness constant and distribution on the recording characteristics of perpendicular media

Author

Miyashita, E. ; Taguchi, R. ; Funabashi, N. ; Tamaki, T. ; Okuda, H.

Author_Institution

Recording Technol. & Mech. Eng., Sci. & Tech. Res. Labs., Tokyo, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2075

Lastpage

2077

Abstract

The relationship between the exchange stiffness constant of a perpendicular medium- and high-density recording characteristics was investigated by micromagnetic simulation. As the exchange stiffness increases, larger magnetic clusters are formed in the ac-erased magnetization state. The shortest recordable bit length of the medium corresponds to the cluster size observed in the ac-erased magnetization state. The slope of the magnetization loop also correlates with the average magnetic cluster size.

Keywords

exchange interactions (electron); magnetisation; perpendicular magnetic anisotropy; perpendicular magnetic recording; ac-erased magnetization state; anisotropic constant; cluster size; easy axis direction; exchange stiffness constant; high-density recording characteristics; magnetic cluster size; magnetization loop; micromagnetic simulation; normal distribution; perpendicular media; Anisotropic magnetoresistance; Computer simulation; Equations; Magnetic anisotropy; Magnetic heads; Magnetic recording; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Soft magnetic materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.801835

Filename

1042095