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    • 2. 发明授权
    • Perpendicular-magnetic recording media and magnetic recording apparatus
    • 垂直磁记录介质和磁记录装置
    • US06852398B2
    • 2005-02-08
    • US10645584
    • 2003-08-22
    • Kazuetsu YoshidaMasaaki FutamotoYoshiyuki Hirayama
    • Kazuetsu YoshidaMasaaki FutamotoYoshiyuki Hirayama
    • G11B5/64G11B5/65G11B5/66H01F10/00H01F10/16H01F41/18H01F10/10B11B5/66
    • G11B5/66Y10T428/12861Y10T428/24942Y10T428/31678
    • The present invention relates to perpendicular magnetic recording media using a ferromagnetic film provided with perpendicular magnetic anisotropy for a recording layer and a magnetic recording apparatus using the media, and the object is to provide the perpendicular magnetic recording media which are excellent in signal to noise ratio (S/N) in a large recording density region, which are stable against thermal fluctuation and which can be easily manufactured, and the magnetic recording apparatus using the media. The representative perpendicular magnetic recording media according to the invention include a glass substrate, a first recording layer which is provided on the substrate via an underlayer, which has perpendicular magnetic anisotropy and the magnitude of magnetic exchange interaction between grains of which is substantially zero and a second recording layer which is laminated on the first recording layer, which is provided with perpendicular magnetic anisotropy and the magnetic exchange interaction between grains of which is larger than that of the first recording layer.
    • 本发明涉及使用具有用于记录层的垂直磁各向异性的铁磁膜和使用该介质的磁记录装置的垂直磁记录介质,其目的是提供信噪比优异的垂直磁记录介质 (S / N)在大的记录密度区域中,其对于热波动是稳定的并且可以容易地制造,以及使用该介质的磁记录装置。 根据本发明的代表性的垂直磁记录介质包括玻璃基板,通过底层设置在基板上的第一记录层,其具有垂直的磁各向异性,并且其晶粒之间的磁交换相互作用的大小基本为零, 层叠在第一记录层上的第二记录层,其具有垂直的磁各向异性,并且其晶粒之间的磁交换相互作用大于第一记录层的磁交换相互作用。