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    • 21. 发明授权
    • Vertical magnetic recording medium
    • 垂直磁记录介质
    • US4726988A
    • 1988-02-23
    • US713463
    • 1985-03-19
    • Tetsuo OkaKenji HayashiTakayoshi AkamatsuSatoshi Horiuchi
    • Tetsuo OkaKenji HayashiTakayoshi AkamatsuSatoshi Horiuchi
    • G11B5/64G11B5/85
    • G11B5/85G11B5/64Y10S428/90Y10T428/249956Y10T428/268Y10T428/31544
    • A vertical magnetic recording medium comprising a substrate and a magnetic layer formed on the substrate and having a magnetic anisotropy in the direction vertical to the surface of the substrate is described. The magnetic layer is composed substantially of a metal selected from cobalt and/or iron, and an oxide of the metal. The metal and metal oxide consist of columnar structures oriented in the direction vertical to the surface of the substrate and spaced from one another through fine voids throughout the magnetic layer. The columnar structures have a diameter of 100 to 1000 .ANG. and the magnetic layer have a void ratio of to 56%. The vertical magnetic recording medium is prepared by a process for vacuum-depositing a metal selected from cobalt and iron to form a magnetic layer on a substrate, wherein an oxygen gas and at least one gas chemically inactive in the vacuum deposition system, which is selected from nitrogen, argon, helium, neon, xenon, radon, methane and ethane, are introduced into the vacuum to an extent such that the pressure in the vicinity of the substrate is 1.times.10.sup.-3 to 5.times.10.sup.-2 Torr.
    • 描述了一种垂直磁记录介质,其包括在基板上形成的基板和磁性层,并且在垂直于基板表面的方向上具有磁各向异性。 磁性层基本上由选自钴和/或铁的金属和金属的氧化物组成。 金属和金属氧化物由垂直于衬底表面的方向定向的柱状结构构成,并且在整个磁性层中通过细小的空隙彼此间隔开。 柱状结构的直径为100〜1000,磁性层的空隙率为56%。 垂直磁记录介质通过真空沉积选自钴和铁的金属的方法制备,以在基板上形成磁性层,其中选择氧气和至少一种在真空沉积系统中化学惰性的气体,其被选择 从氮气,氩气,氦气,氖气,氙气,氡气,甲烷和乙烷引入到真空中使得衬底附近的压力为1×10 -3至5×10 -2乇的程度。