Noise characteristics of double-layered perpendicular media using Fe-Ta-C underlayer

Author

Kikukawa, Atsushi ; Tanahashi, Kiwamu ; Honda, Yukio ; Hirayama, Yoshiyuki ; Futamoto, Masaaki

Author_Institution

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

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1602

Lastpage

1604

Abstract

The noise characteristics of double-layered perpendicular media having an Fe-Ta-C soft-magnetic underlayer were investigated. It was revealed that changes in soft magnetic properties and a consequent increase in media noise occurs when C or Ta are reduced from the standard composition. Two-dimensional spike distributions were observed in a medium using the standard Fe-Ta-C composition, possibly caused by temperature inhomogeneity during the annealing process. It was also concluded that the noise contribution of the spikes was minimal for disks using an Fe-Ta-C SMU

Keywords

iron alloys; magnetic recording noise; perpendicular magnetic recording; tantalum alloys; Fe-Ta-C soft-magnetic underlayer; Fe-Ta-C underlayer; FeTaC; annealing process; double-layered perpendicular media; media noise; noise characteristics; soft magnetic properties; temperature inhomogeneity; two-dimensional spike distributions; Amorphous magnetic materials; Annealing; Crystalline materials; Magnetic anisotropy; Magnetic films; Magnetic materials; Magnetic noise; Magnetic properties; Perpendicular magnetic recording; Soft magnetic materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950913

Filename

950913