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    • 5. 发明申请
    • Single-pass recording of multilevel patterned media
    • 多层图案化媒体的单遍录制
    • US20080085424A1
    • 2008-04-10
    • US11544609
    • 2006-10-10
    • Alexander Y. DobinHans J. RichterErol Girt
    • Alexander Y. DobinHans J. RichterErol Girt
    • G11B5/64
    • G11B5/855
    • A method of performing data/information recording and retrieval utilizing a multilevel patterned magnetic medium, comprises: (a) providing a magnetic recording system including a read/write head and a multilevel patterned magnetic recording medium including a plurality of spaced apart elements each comprising a stacked plurality n of magnetic recording cells with different magnetic properties and magnetically decoupled from overlying and/or underlying cells; (b) providing relative movement between the write head and magnetic recording medium; and; (c) writing to the medium by supplying the write head with a modulated write current comprising a plurality n of pulses of different magnitudes while the head moves past each element, thereby applying n different magnetic field strengths to each element, the write current including a first pulse of magnitude sufficient to write to a first cell of each element having a highest magnetic coercivity of said cells, and n−1 succeeding pulses of progressively smaller magnitude for sequentially writing to the remaining n−1 lower magnetic coercivity cells of each element but of insufficient magnitude to write to progressively higher magnetic coercivity cells; whereby the writing occurs in a single pass of the write head past each element.
    • 一种使用多级图案化磁介质执行数据/信息记录和检索的方法包括:(a)提供磁记录系统,该磁记录系统包括读/写磁头和包含多个间隔开的元件的多层图案化磁记录介质, 堆叠多个具有不同磁性的磁记录单元,并与上覆和/或下面的单元磁解除耦合; (b)提供写入头和磁记录介质之间的相对运动; 和; (c)当头部移动通过每个元件时,通过向写入头提供包括多个n个不同幅度的脉冲的调制写入电流来写入介质,从而对每个元件施加n个不同的磁场强度,写入电流包括 具有足以写入具有所述单元的最高磁矫顽力的每个元件的第一单元的第一脉冲幅度以及逐渐变小的量级的n-1个后续脉冲,用于顺序地写入每个元件的剩余n-1个低磁性矫顽力单元,但是 数量不足以写入逐渐升高的磁矫顽力细胞; 由此写入在写入头的单次通过每个元件之后发生。
    • 9. 发明申请
    • CoPtCr-based bit patterned magnetic media
    • 基于CoPtCr的位图形磁介质
    • US20080075978A1
    • 2008-03-27
    • US11525958
    • 2006-09-25
    • Dieter K. WellerHans J. RichterSamuel D. HarknessErol Girt
    • Dieter K. WellerHans J. RichterSamuel D. HarknessErol Girt
    • G11B5/64G11B5/66
    • 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 Co1-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 K, 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.
    • 有位图案化的磁记录介质包括具有表面的衬底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,并且由一层薄膜层组成,包括顺序 从基底表面:种子层; 以及与籽晶层的表面接触并且包括Co 1-xy Pt 3 x Cr Cr合金材料的垂直磁记录层, 其中0.05 <= x <= 0.35且0 <= y <= 0.15。 合金材料具有一级磁各向异性常数K,高达约2×10 7Ω/ / SUP> erg / cm 3,饱和磁化强度M s高达约1200emu / cm 3,各向异性场H < 具有C轴垂直于其表面的六边形(0001)晶体结构,并且至少约为35kOe, X射线衍射(XRD)摇摆曲线半峰全宽(FWHM)为〜5°以下。