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    • 8. 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。
    • 9. 发明授权
    • Tuning exchange coupling in magnetic recording media
    • 调谐磁记录介质中的交换耦合
    • US08119263B2
    • 2012-02-21
    • US11231796
    • 2005-09-22
    • Thomas Patrick NolanSamuel D. Harkness, IV
    • Thomas Patrick NolanSamuel D. Harkness, IV
    • G11B5/66
    • G11B5/66G11B5/65G11B5/851
    • A magnetic recording medium having a substrate, a first magnetic layer and a second magnetic layer, in this order, wherein an exchange coupling in the first magnetic layer is lower than an exchange coupling in the second magnetic layer, and the first and second magnetic layers are in a film stack so that magnetic grains in the first magnetic layer are exchange coupled by a pathway through the second magnetic layer is disclosed. A method of manufacturing a magnetic recording medium by obtaining a substrate, depositing a first magnetic layer at a first sputter gas pressure and depositing a second magnetic layer at a second sputter gas pressure, in this order, wherein the first sputter gas pressure is higher than the second sputter gas pressure, and an exchange coupling in the first magnetic layer is lower than an exchange coupling in the second magnetic layer is also disclosed.
    • 一种具有基板,第一磁性层和第二磁性层的磁记录介质,其中第一磁性层中的交换耦合低于第二磁性层中的交换耦合,第一和第二磁性层 公开了通过第二磁性层的路径将第一磁性层中的磁性颗粒交换耦合的薄膜叠层。 一种通过获得衬底制造磁记录介质的方法,以第一溅射气体压力沉积第一磁性层并以第二溅射气体压力沉积第二磁性层,其中第一溅射气体压力高于 第二溅射气体压力和第一磁性层中的交换耦合也低于第二磁性层中的交换耦合。