High corrosion-resistant magneto-optical film on a new plastic substrate

Author

Niihara, Toshio ; Kirino, Fumiyoshi ; Ogihara, Noriyuki ; Koyama, Emi ; Sudou, Ryoichi ; Shigematsu, Kazuo ; Ohta, Norio

Author_Institution

Hitachi Ltd., Tokyo, Japan

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2437

Lastpage

2442

Abstract

To realize high-data-rate and high-reliability magnetooptical (MO) disks, a corrosion-resistant MO film and a novel plastic substrate were developed. Corrosion was reduced by adding a metallic element (M=Ti,Nb,Ta,Cr) to TbFeCo film. The magnetic characteristics of TbFeCoM film were designed to be the same as those of the TbFeCo film. The plastic substrate (photocurable casting resin, PHC) shows low retardation and high heat resistance. MO disks with a trilayer structure on PHC showed high reliability even in severe conditions. The performance of a prototype MO recording system using the PHC disk is presented

Keywords

chromium alloys; cobalt alloys; corrosion protection; iron alloys; magnetic thin films; magneto-optical recording; niobium alloys; tantalum alloys; terbium alloys; titanium alloys; PHC; Tb-Fe-Co-Cr; Tb-Fe-Co-Nb; Tb-Fe-Co-Ta; Tb-Fe-Co-Ti; corrosion-resistant magneto-optical film; high heat resistance; high-data-rate; low retardation; magnetic characteristics; magneto-optical discs; photocurable casting resin; plastic substrate; trilayer structure; Casting; Corrosion; Dielectric substrates; Laboratories; Magnetic films; Magnetic properties; Optical films; Oxidation; Plastic films; Resins;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92134

Filename

92134