Magnetic and magneto-optical properties of Co-containing Bi-DyIG particles dispersed in a plastic binder

Author

Hirano, Teruyoshi ; Yoshida, Kaneki ; Yamazaki, Yohtaro ; Namikawa, Tatsuru ; Kishi, Motoharu

Author_Institution

Toppan Printing Co. Ltd., Saitama, Japan

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3277

Lastpage

3279

Abstract

Nano-size Co_x:BiDy₂Al_0.8Fe_4.2O₁₂ (0⩽x⩽2.0) particles were prepared with a coprecipitation method. The coating films of the particles were prepared with a coating technique. The magnetic and magneto-optical properties of the particles and films were investigated. The M_S and H_C of the particles and films increased with Co content, x. The Faraday rotation dropped with x. The x=0.5 film has high H_C about 450 Oe, and the figure of merit at 520 nm is about 0.63. The particle size in the film was about 50~100 nm which is smaller than the wavelength of the read and write laser (633 nm). These results show that the coating Co _x:BiDy₂Al_0.8Fe_4.2O₁₂ film is a candidate material for a new economical magneto-optical storage medium

Keywords

Faraday effect; bismuth compounds; cobalt compounds; coercive force; dysprosium compounds; garnets; magnetic particles; magnetic thin films; magnetisation; magneto-optical recording; nanostructured materials; particle size; 50 to 100 nm; 520 nm; 633 nm; BiDy2Al5O12Fe5O12; BiDy₂AGIG; BiDy₂Al_0.8Fe_4.2O₁₂:Co; Faraday rotation; coercive force; coprecipitation method; figure of merit; magnetic properties; magneto-optical properties; magneto-optical storage medium; nano-size Co_x:BiDy₂Al_0.8Fe_4.2O₁₂ particles; particle coating films; particle size; plastic binder dispersion; read wavelength; saturation magnetization; write wavelength; Atomic force microscopy; Bismuth; Coatings; Coercive force; Extraterrestrial measurements; Iron; Magnetic films; Magnetic materials; Magnetic properties; Material storage; Optical materials; Plastics;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617916

Filename

617916