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    • 1. 发明授权
    • Longitudinal magnetic media having a granular magnetic layer
    • 具有粒状磁性层的纵向磁性介质
    • US07407719B1
    • 2008-08-05
    • US10829164
    • 2004-04-22
    • Erol GirtLi-Lien LeeSamuel D. Harkness, IV
    • Erol GirtLi-Lien LeeSamuel D. Harkness, IV
    • G11B5/66
    • G11B5/732G11B5/65G11B5/7325
    • A novel method of manufacturing a longitudinal granular oxide recording medium is disclosed. The method preferably entails obtaining a non-magnetic substrate, heating the substrate at a temperature T1 that is greater than 150° C., forming a first layer with body-centered cubic atomic structure and with a preferred growth orientation, cooling the substrate to a temperature T2 and forming a second layer comprising a magnetic oxide-containing granular magnetic layer with a hexagonal close packed atomic structure and with a preferred growth orientation. The magnetic oxide-containing granular magnetic layer contains magnetic crystal grains that are substantially isolated by an inter-granular region comprising a non-magnetic substance, wherein the non-magnetic substance is preferably an oxide-containing material.
    • 公开了制造纵向粒状氧化物记录介质的新颖方法。 该方法优选需要获得非磁性衬底,在大于150℃的温度T 1加热衬底,形成具有体心立方原子结构的第一层, 200>优选的生长方向,将衬底冷却至温度T 2,并形成包含具有六方密堆积原子结构的含氧化物的颗粒状磁性层的第二层,并且具有<11-20> 首选生长方向。 含有磁氧化物的粒状磁性层含有通过包含非磁性物质的颗粒间区域基本隔离的磁性晶粒,其中非磁性物质优选为含氧化物的材料。
    • 2. 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。
    • 7. 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。
    • 10. 发明授权
    • Post-deposition annealed recording media and method of manufacturing the same
    • 后沉积退火记录介质及其制造方法
    • US07166320B1
    • 2007-01-23
    • US09781978
    • 2001-02-14
    • Samuel D. Harkness, IVJie Zou
    • Samuel D. Harkness, IVJie Zou
    • B05D5/12
    • G11B5/8408C23C14/165C23C14/5806G11B5/72
    • A novel technique for incorporating rapid thermal annealing into media sputter fabrication has facilitated the production of flyable media samples. Discs are fabricated with standard processing techniques to control physical grain size and crystallite texture. A CrMn caplayer ranging in thickness between 0.5 and 5 nm is subsequently deposited to provide the Mn-diffusant necessary to achieve post-treatment exchange de-coupling. While still in-situ and before application of protective overcoats, the discs are exposed to temperatures between 200° C. and 350° C. compatible with most media production processes. A threefold increase in coercive force (peak reaching ˜3800 Oe) and 10 dB improvement in medium signal-to-noise ratio is observed for the optimized process.
    • 用于将快速热退火引入介质溅射制造的新颖技术促进了可飞行介质样品的生产。 光盘采用标准处理技术制造,以控制物理粒度和微晶纹理。 随后沉积厚度在0.5和5nm之间的CrMn覆盖层以提供实现后处理交换去耦合所必需的Mn扩散剂。 虽然仍然在原位和施加保护性外涂层之前,盘暴露于与大多数介质生产过程兼容的200℃和350℃之间的温度。 对于优化的过程,观察到矫顽力(峰值达到〜3800Oe)增加三倍和中等信噪比的10dB提高。