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    • 3. 发明申请
    • Magnetic recording medium
    • 磁记录介质
    • US20070111038A1
    • 2007-05-17
    • US11273607
    • 2005-11-15
    • Jun KoujimaTeruaki SantokiTakanori Doi
    • Jun KoujimaTeruaki SantokiTakanori Doi
    • G11B5/65
    • G11B5/70G11B5/70642
    • A magnetic recording medium comprises a polymer film substrate having an elongated shape or a polymer flexible substrate; an underlayer having a thickness of less than 10 nm, which is formed on the substrate; and a magnetic recording layer comprising a spinel iron oxide thin film containing maghemite as a main component, which is formed on the underlayer and has a coercive force of not less than 159 kA/m (2000 Oe). The present invention provides the magnetic recording medium comprising a spinel iron oxide thin film containing maghemite as a main component, which exhibits an excellent recording resolution performance while maintaining a high coercive force and a high coercive force squareness.
    • 磁记录介质包括具有细长形状的聚合物薄膜基材或聚合物柔性基材; 形成在基板上的厚度小于10nm的底层; 以及包含形成在底层上并具有不小于159kA / m(2000Oe)的矫顽力的以磁赤铁矿为主要成分的尖晶石氧化铁薄膜的磁记录层。 本发明提供一种包含磁铁矿作为主要成分的尖晶石氧化铁薄膜的磁记录介质,在保持高矫顽力和高矫顽力矩形度的同时表现出优异的记录分辨率性能。