Recording characteristics and thermal stability of AFC thin film media

Author

Guan, Lijie ; Zhu, Jian-Gang

Author_Institution

Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1452

Lastpage

1455

Abstract

We present a micromagnetic and analytical analysis of double layer media with antiferromagnetic exchange coupling. It has been found that in order to achieve good recording performance, strong interlayer exchange coupling and large thickness ratio are desired. When the thickness of the bottom layer is small, thermal activation assists the bottom layer to switch, which requires a smaller interlayer exchange coupling constant. Thermal stability of double layer AFC media has also been investigated in comparison to single layer media in the case of strong and weak interlayer exchange coupling

Keywords

coercive force; exchange interactions (electron); magnetic hysteresis; magnetic multilayers; magnetic recording; magnetic switching; thermal stability; antiferromagnetic exchange coupling; bottom layer switching; coercivity; double layer media; hysteresis curves; large thickness ratio; magnetostatic interactions; micromagnetic analysis; multilayer media; recording characteristics; strong interlayer exchange coupling; thermal activation; thermal stability; thin film media; Antiferromagnetic materials; Automatic frequency control; Couplings; Crystallization; Magnetic separation; Magnetostatics; Micromagnetics; Saturation magnetization; Thermal stability; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950868

Filename

950868