| 摘要 |
PURPOSE:To obtain an amorphous magnetooptic layer having a large Kerr rotating angle and excellent reproducing characteristics by forming a magnetooptic layer consisting of Gd-Dy-Fe-Co or Gd-Dy-Fe-Co-specific metallic atoms having the axis of easy magnetization in the direction perpendicular to the film plane. CONSTITUTION:The alloy layer expressed by (GdxDY1-x)z(Fe1-yCoy)1-z or {Gdx Dy1-x)z(Fe1-yCoy)1-z}1-AMA where the conditions 0.001<x<1.00, 0.01<=y<=0.50, 0.10<=z<=0.40, 0.001<=a<=0.10 are satisfied and M is >=1 kind selected from Cr, Cu, Bi, Sn and Ni is formed on a substrate such as a hard disk or floppy disk by a sputtering method, etc. in an inert gaseous atmosphere. The film thickness is made about 0.01-1mu. The amorphous magnetooptic layer has the axis of easy magnetization in the direction perpendicular to the film plane and has the large Kerr rotating angle and excellent reproducing characteristic is thus obtd. |
