| 摘要 |
PURPOSE:To enable easier perpendicular magnetization and increase of a signal quantity by providing a magnetic films consisting of two-layered films consisting of PtMnSb and rare earth-transition metal alloy. CONSTITUTION:An SiN film 3, a PtMnSb film 4, a TbFeCo film 5, and an SiN film 6 are formed in this order on a resin film 2 having spiral grooves and spin coating with silicone rubber 7 is executed. The PtMnSb film 4 is formed by an electron ray vapor deposition method. The SiN film 3 and the TbFeCo film 5 are formed by using RF magnetron sputtering. The formation of said films is executed by depositing the PtMnSb film 4 and the TbFeCo film 5 in this order on a flat glass plate and projecting laser light to the films from the glass side in the direction perpendicular to the film plane. Since the magnetic film is made into the two-layered structure consisting of the PtMnSb film 4 and the TbFeCo film 5, thetaK can be taken about 2.5 times larger and C/N is improved by 8dB as compared to a magneto-optical disk. The thetaK is thereby increased and the recording and reproduction are executed without degrading the perpendicular magnetic anisotropy.
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