磁気光学・光磁気記録
Pt/Coディスクの消去劣化過程
1994 年 18 巻 2 号 p. 167-171
詳細
1994 年 18 巻 2 号 p. 167-171
The degradation processdue to multiple erasing in Pt/Co magneto-optical disks was studied by measuring the magnetic property of the degraded region and by observing the deformation of the substrate. The media noise was found toincrease at a lower number of erasing cycles than that needed to effect a decrease in the carrier level. The increase in the media noise is attributed to the decrease in the perpendicular magnetic anisotropy (Ku) of the Pt/Co multilayered film. The decrease in the carrier level is attributed to the reduction in the residual Kerr rotation due to a further decrease in Ku, and to the deformation of the substrate.
