Title :
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
fDate :
11/1/1988 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
