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- W2000954754 abstract "In order to increase the recording density of the optic disks, it is necessary to shorten the wavelength of the laser beams. Recently, Pt/Co multilayered films have been investigated for the optic recording media using the laser with the wavelength shorter than 600 nm because of the high Kerr rotation. It is, however, difficult to write the magnetic domains with the diameter less than 0.5 μm stably due to the small coercivity and the uniaxial anisotropy field. On the other hand, it is easy to write the domains with the diameter of 0.3 μm on the conventional media of TbFeCo. To use this advantage, the exchange-coupled double-layered film of (Pt/Co)/(TbFeCo) has been developed. The disk structure is Al-alloy/nitride/(Pt/Co)/TbFeCo/nitride/substrate. The multilayered film of Pt/Co has been optimized to write smaller domains and have a higher Kerr rotation for high output signal. Consequently, the thickness is 20 Å/5 Å, respectively. It has been confirmed that the 0.3 μm φ domains can be written clearly and the figure of merit √Rθk is twice as large as that of the conventional TbFeCo at the short wavelength region of 400–500 nm. Finally, the read/write characteristics have been tested with the SHG laser of 532 nm." @default.
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- W2000954754 date "1991-04-15" @default.
- W2000954754 modified "2023-09-27" @default.
- W2000954754 title "Magneto-optic disks for high-density recording with a shorter wavelength laser (abstract)" @default.
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- W2000954754 doi "https://doi.org/10.1063/1.348275" @default.
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