Micromagnetics of a soft underlayer

Author

Litvinov, Dmitri ; Chomko, Roman M. ; Abelmann, Leon ; Ramstöck, Klaus ; Chen, GaLane ; Khizroev, Sakhrat

Author_Institution

Seagate Res., Pittsburgh, PA, USA

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2483

Lastpage

2485

Abstract

The micromagnetic properties of a soft underlayer in perpendicular media are studied. It is shown that stray fields from a recording layer can substantially modify magnetic properties of soft underlayer material. The degree of modification is determined by the characteristic bit size in the recording layer and by the soft underlayer material magnetic characteristics. It is found that there exists a thin layer within a soft underlayer with reduced permeability. The effects of the presence of such a reduced permeability region within a soft underlayer on both reading and writing processes are discussed

Keywords

digital magnetic recording; magnetic multilayers; magnetic permeability; perpendicular magnetic recording; characteristic bit size; magnetic recording layer; micromagnetic properties; perpendicular media; reading processes; reduced permeability region; soft underlayer; stray fields; underlayer material magnetic characteristics; writing processes; Magnetic anisotropy; Magnetic materials; Magnetic properties; Magnetic recording; Micromagnetics; Permeability; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Soft magnetic materials; Thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908481

Filename

908481