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    • 23. 发明授权
    • CoPtCr-based bit patterned magnetic media
    • 基于CoPtCr的位图形磁介质
    • US08673466B2
    • 2014-03-18
    • US11525958
    • 2006-09-25
    • Dieter K. WellerHans J. RichterSamuel D. Harkness, IVErol Girt
    • Dieter K. WellerHans J. RichterSamuel D. Harkness, IVErol Girt
    • G11B5/66
    • G11B5/656G11B5/667G11B5/732G11B5/855
    • A bit patterned magnetic recording medium comprises a substrate having a surface, and a plurality of spaced apart magnetic elements on the surface, each element constituting a discrete magnetic domain or bit of the same structure and comprised of a stack of thin film layers including in order from the substrate surface: a seed layer; and a perpendicular magnetic recording layer in contact with a surface of the seed layer and comprising a Co 1-x-yPtxCry alloy material, where 0.05≦x≦0.35 and 0≦y≦0.15. The Co1-x-yPtxCry alloy material has a first order magnetic anisotropy constant K1 up to about 2×107 erg/cm3, a saturation magnetization Ms up to about 1200 emu/cm3, an anisotropy field HK=2K1/Ms up to about 35 kOe, a hexagonal (0001) crystal structure with c-axis perpendicular to a surface thereof, and an X-Ray diffraction (XRD) rocking curve with a full width at half maximum (FWHM) of ˜5° or less.
    • 位图形磁记录介质包括具有表面的基板和表面上的多个间隔开的磁性元件,每个元件构成相同结构的离散磁畴或位,并且包括一层薄层, 从基底表面:种子层; 以及与种子层的表面接触并包括Co 1-x-yPt x Cry合金材料的垂直磁记录层,其中0.05≤x≤0.35和0≤y≤0.15。 Co1-x-yPtxCry合金材料具有高达约2×107erg / cm3的一阶磁各向异性常数K1,高达约1200emu / cm3的饱和磁化强度Ms,高达约35的各向异性磁场HK = 2K1 / Ms kOe,具有垂直于其表面的c轴的六边形(0001)晶体结构,以及具有约5°或更小的全半宽度(FWHM)的X射线衍射(XRD)摇摆曲线。
    • 27. 发明授权
    • Multiple orientation magnetic information storage
    • 多方位磁信息存储
    • US06661592B2
    • 2003-12-09
    • US10327577
    • 2002-12-19
    • Hans J. RichterRoger K. Malmhäll
    • Hans J. RichterRoger K. Malmhäll
    • G11B509
    • G11B5/012G11B5/09G11B5/127G11B5/2652G11B5/2655G11B11/10528G11B2005/0002G11B2005/0005G11B2005/0021
    • A system for transferring information to and from a magnetic disk is disclosed wherein the information may be encoded on a data track in a large number of polarization orientations in comparison to conventional bidirectional recording schemes. In one embodiment of the present invention, it is contemplated that a single segment may be polarized in eight different orientations, each of which being distinguishable from each other by a read/write head. Polarization of a segment in one of eight different orientations significantly increases the amount of information which can be stored in any given segment relative to conventional systems which are polarized in only one of two orientations. Thus, the amount of information which may be stored on a disk may be increased without having to alter the linear or radial density of the disk.
    • 公开了一种用于向磁盘传送信息的系统,其中与传统的双向记录方案相比,信息可以以大量极化取向在数据磁道上进行编码。 在本发明的一个实施例中,可以设想单个片段可以以八个不同的取向极化,每个方向通过读/写头彼此区分开。 在八个不同取向中的一个中,段的极化显着地增加了可以存储在任何给定段中的信息量,相对于仅在两个取向中的一个方向上被极化的常规系统。 因此,可以增加可以存储在盘上的信息量,而不必改变盘的线性或径向密度。