DocumentCode
1027955
Title
Magneto-optical recording media of GD based amorphous alloy systems with high kerr rotation
Author
Takayama, S. ; Kirino, F. ; Suzuki, Y. ; Okamine, S. ; Ohta, N.
Author_Institution
Hitachi Ltd., Kokubunji, Tokyo, Japan
Volume
23
Issue
5
fYear
1987
fDate
9/1/1987 12:00:00 AM
Firstpage
2611
Lastpage
2613
Abstract
To obtain practical magnetooptical materials having large Kerr rotation Θk, high perpendicular coercivity Hc and relatively low Curie temperature Tc( 
C), rare-earth elements having a one-ion anisotropy were added to Gd-Fe-Co amorphous alloy system, which has a large intrinsic Kerr rotation but an in-plain anisotropy. As a result, replacing Gd by Tb,Dy,Ho, a large perpendicular anisotropy Ku is induced associating with the increase of Hc. With the optimization of their compositions, Gd-R-Fe-Co (R=Tb,Dy,Ho) amorphous films with Θk= 0.42-0.45° (at the wavelength of 822nm), Tc C, and Hc=160-400 kA/m(2-5 kOe) were obtained.
C), rare-earth elements having a one-ion anisotropy were added to Gd-Fe-Co amorphous alloy system, which has a large intrinsic Kerr rotation but an in-plain anisotropy. As a result, replacing Gd by Tb,Dy,Ho, a large perpendicular anisotropy Ku is induced associating with the increase of Hc. With the optimization of their compositions, Gd-R-Fe-Co (R=Tb,Dy,Ho) amorphous films with Θk= 0.42-0.45° (at the wavelength of 822nm), Tc C, and Hc=160-400 kA/m(2-5 kOe) were obtained.Keywords
Magnetooptic memories; Amorphous materials; Anisotropic magnetoresistance; Magnetic films; Magnetic materials; Magnetooptic effects; Magnetooptic recording; Optical films; Optical recording; Plasma measurements; Torque;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.1987.1065359
Filename
1065359
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