Direct overwriting and super resolution using exchange-coupled magnetic multilayer disks

Author

Kaneko, Masahiko

Author_Institution

Sony Corp., Tokyo, Japan

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2494

Lastpage

2499

Abstract

The spin structure and stable condition for the interface magnetic wall in magnetic multilayers have been investigated. The value of the interface wall energy is optimized on the basis of the calculation for application to overwriting by light intensity modulation and magnetically induced superresolution. Direct overwriting by light intensity modulation is made possible by using magnetic triple layers with a power margin of ±30%, a linear density of 0.8 μm/b, and a track pitch of 1.4 μm. Superresolution by using magnetic quadri-layers enables a linear density of 0.3 μm/b, which is more than three times higher than the density for current magnetooptical disks

Keywords

exchange interactions (electron); magnetic interface phenomena; magnetic multilayers; magneto-optical recording; optical modulation; direct overwriting; exchange-coupled magnetic multilayer disks; interface magnetic wall; interface wall energy; light intensity modulation; linear density; magnetic multilayers; magnetic quadri-layers; magnetic triple layers; magnetically induced superresolution; magnetooptical disks; power margin; spin structure; stable condition; super resolution; track pitch; Intensity modulation; Magnetic anisotropy; Magnetic fields; Magnetic films; Magnetic multilayers; Optical films; Optical modulation; Optical recording; Perpendicular magnetic anisotropy; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179535

Filename

179535