Magnetic anisotropy of perpendicular media on grooved structure substrate

Author

Tagami, Katsumichi ; Gokan, Hiroshi ; Mukainaru, Masahito

Author_Institution

NEC Corp., Kawasaki, Japan

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2344

Lastpage

2346

Abstract

Magnetic anisotropies were investigated for CoCr perpendicular magnetic films on grooved structure substrates (pitch length 2.1 μm) prepared by CF₄-reactive-ion etching. Perpendicular magnetic anisotropy decreases in the region where groove depth GD >650 A. The reduction is due to the inclination of the crystal growth axis on the groove surface. In-plane magnetic anisotropy, K_u||, strongly depends on GD and saturation magnetization M_s. In a region of large GD and large M_s, Ku_|| is mainly due to shape anisotropy. In a region of small GD and small M_s, K_u|| is caused by perpendicular magnetic anisotropy, in addition to shape and magnetorestrictive anisotropy

Keywords

chromium alloys; cobalt alloys; ferromagnetic properties of substances; magnetic anisotropy; magnetic recording; magnetic thin films; CoCr; crystal growth axis; grooved structure substrate; magnetic anisotropy; magnetorestrictive anisotropy; perpendicular magnetic films; perpendicular media; pitch length; reactive-ion etching; saturation magnetization; shape anisotropy; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic films; Magnetooptic recording; Magnetostriction; Optical films; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Substrates;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92104

Filename

92104