High magnetization exchange-couple double-layer TbFeCo for magnetic flux reading optical recording

Author

Lin, Chao-Cheng ; Lai, Chih-Huang ; Chen, B.M. ; Shieh, Han-Ping D.

Author_Institution

Dept. of Mater. Sci. & Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1399

Lastpage

1402

Abstract

High magnetization (Mr) and enhanced coercivity magneto-optical (MO) recording media TbFeCo (TFC) were investigated for hybrid magnetic flux reading/optical recording due to their large magnetic flux. To increase the stability of high Mr TFC media, dual-layer disks composed of TM-rich readout layer with saturation magnetization (MS)=370 emu/cm ³ and RE-rich memory layer were fabricated. Coercivity and interface energy between double layers as a function of active layer thickness were examined. By simulating thermo-magnetic writing, the dual-layer media were shown to be applicable for optical writing/magnetic flux reading recording

Keywords

cobalt alloys; coercive force; exchange interactions (electron); ferromagnetic materials; iron alloys; magnetic multilayers; magneto-optical recording; terbium alloys; TbFeCo; active layer thickness; coercivity; dual-layer disks; exchange-couple double-layer media; hybrid magnetic flux reading/optical recording; interface energy; magneto-optical recording media; saturation magnetization; thermo-magnetic writing; Coercive force; Disk recording; Magnetic flux; Magnetic recording; Magnetooptic recording; Optical recording; Optical saturation; Saturation magnetization; Stability; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950853

Filename

950853