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    Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple lower layers
    1.
    发明申请
    Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple lower layers 有权
    具有多层下层的反铁磁耦合磁性层的磁记录盘

    公开(公告)号：US20050190498A1

    公开(公告)日：2005-09-01

    申请号：US10788687

    申请日：2004-02-26

    申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

    发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

    IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/738 ,  G11B5/82 ,  H01F10/16

    CPC分类号： G11B5/66 ,  G11B5/656

    摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has three lower ferromagnetic layers (LL1, LL2, LL3) and an upper ferromagnetic layer (UL), all four ferromagnetic layers being antiferromagnetically-coupled together across corresponding antiferromagnetically-coupling layers. The UL has a magnetization-remanence-thickness product (Mrt) greater than the Mrt each of the three lower layers LL1, LL2, LL3, and greater than the sum of the Mrt values of LL1 and LL3. The middle lower layer LL2 has an Mrt less than the Mrt of each of the other lower layers LL1 and LL3, and as a result the composite Mrt of the AFC structure is less than the composite Mrt of a conventional AFC structure having only a single lower layer. The AFC structure achieves this composite Mrt reduction without increasing the Mrt of any of the three lower layers above the maximum Mrt of the single lower layer in the conventional AFC structure.

    摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有三个低铁磁层（LL1，LL2，LL3）和上铁磁层（UL），所有四个铁磁层在相应的反铁磁耦合层上反铁磁耦合在一起 。 UL具有大于三个下层LL1，LL2，LL3中的每一个的Mrt的磁化剩磁厚度乘积（Mrt），并且大于LL1和LL3的Mrt值的和。 中下层LL2的Mrt小于其他下层LL1和LL3中的每一层的Mrt，结果，AFC结构的复合材料Mrt小于仅具有单一下层LL1和LL3的常规AFC结构的复合材料Mrt 层。 AFC结构在不增加传统AFC结构中单个下层的最大Mrt以上的三个下层中的任何一个的Mrt的情况下实现了该复合Mrt的还原。

    Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple ferromagnetically-coupled lower layers
    2.
    发明申请
    Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple ferromagnetically-coupled lower layers 失效
    具有反铁磁耦合磁性层的磁记录盘具有多个铁磁耦合的下层

    公开(公告)号：US20050214586A1

    公开(公告)日：2005-09-29

    申请号：US10808020

    申请日：2004-03-23

    申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

    发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

    IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/72

    CPC分类号： G11B5/66 ,  G11B5/656

    摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has an upper ferromagnetic layer (UL), and a lower ferromagnetic layer structure formed of two ferromagnetically-coupled lower layers (LL1, LL2). The UL is antiferromagnetically-coupled to the lower layer structure across an antiferromagnetically-coupling layer. LL1 and LL2 are ferromagnetically coupled across a ferromagnetic coupling layer so the magnetizations of LL1 and LL2 remain parallel in each remanent magnetic state, but are antiparallel to the magnetization of the UL in each remanent magnetic state. The UL has an Mrt greater than the sum of the Mrt values of LL1 and LL2.

    摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有上铁磁层（UL）和由两个铁磁耦合的下层（LL 1，LL 2）形成的低铁磁层结构。 UL通过反铁磁耦合层与下层结构反铁磁耦合。 LL 1和LL 2横跨铁磁耦合层铁磁耦合，因此LL 1和LL 2的磁化在每个剩余磁性状态下保持平行，但在每个剩余磁状态下与UL的磁化反平行。 UL具有大于LL1和LL2的Mrt值之和的Mrt。

    Disk drive with laminated magnetic thin films with sublayers for magnetic recording
    4.
    发明申请
    Disk drive with laminated magnetic thin films with sublayers for magnetic recording 有权
    具有层叠磁性薄膜的磁盘驱动器，具有用于磁记录的子层

    公开(公告)号：US20060210835A1

    公开(公告)日：2006-09-21

    申请号：US11084402

    申请日：2005-03-18

    申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

    发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

    IPC分类号： G11B5/66

    CPC分类号： G11B5/656 ,  G11B5/66

    摘要： The invention includes a disk drive with a magnetic recording disk with an upper and lower sublayer in at least one magnetic layer of a laminated magnetic layer structure that includes a spacer layer that substantially decouples the magnetic layers. The lower sublayer has a lower boron content than the upper sublayer and a preferred embodiment is CoPtCrBTa. The upper sublayer is deposited onto the lower sublayer and is preferably CoPtCrB with a higher boron content than the lower sublayer. The composition of the lower sublayer gives it a very low moment with low intrinsic coercivity which would not be useful as a recording layer on its own. The upper sublayer is a higher moment alloy with high intrinsic coercivity. An embodiment of the invention includes a laminated magnetic layer structure which is antiferromagnetically coupled to a lower ferromagnetic layer.

    摘要翻译： 本发明包括具有磁记录盘的磁盘驱动器，该磁盘驱动器具有在层叠磁性层结构的至少一个磁性层中具有上和下子层的磁记录盘，该磁层包括使磁性层基本上分离的间隔层。 下层具有比上层更低的硼含量，优选实施方案是CoPtCrBTa。 上部子层沉积在下部子层上，优选的是具有比下部子层更高的硼含量的CoPtCrB。 下层的组成使得其具有低固有矫顽力的非常低的力矩，其本身不会用作记录层。 上层是具有高固有矫顽力的较高的力矩合金。 本发明的实施例包括层叠的磁性层结构，其被反铁磁耦合到下铁磁层。

    Laminated magnetic thin films with sublayers for magnetic recording
    5.
    发明申请
    Laminated magnetic thin films with sublayers for magnetic recording 审中-公开
    具有用于磁记录的子层的层压磁性薄膜

    公开(公告)号：US20060210834A1

    公开(公告)日：2006-09-21

    申请号：US11084401

    申请日：2005-03-18

    申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

    发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

    IPC分类号： G11B5/66

    CPC分类号： G11B5/656 ,  G11B5/66

    摘要： The invention uses an upper and lower sublayer in at least one magnetic layer of a laminated magnetic layer structure that includes a spacer layer that substantially decouples the magnetic layers in a magnetic recording medium. The lower sublayer has a lower boron content than the upper sublayer and a preferred embodiment is CoPtCrBTa. The upper sublayer is deposited onto the lower sublayer and is preferably CoPtCrB with a higher boron content than the lower sublayer. The composition of the lower sublayer gives it a very low moment with low intrinsic coercivity which would not be useful as a recording layer on its own. The upper sublayer is a higher moment alloy with high intrinsic coercivity. An embodiment of the invention includes a laminated magnetic layer structure which is antiferromagnetically coupled to a lower ferromagnetic layer.

    摘要翻译： 本发明使用层叠磁性层结构的至少一个磁性层中的上部和下部子层，其包括使磁性记录介质中的磁性层基本上分离的间隔层。 下层具有比上层更低的硼含量，优选实施方案是CoPtCrBTa。 上部子层沉积在下部子层上，优选的是具有比下部子层更高的硼含量的CoPtCrB。 下层的组成使得其具有低固有矫顽力的非常低的力矩，其本身不会用作记录层。 上层是具有高固有矫顽力的较高的力矩合金。 本发明的实施例包括层叠的磁性层结构，其被反铁磁耦合到下铁磁层。

    Antiferromagnetically coupled media for magnetic recording with weak coupling layer
    6.
    发明申请
    Antiferromagnetically coupled media for magnetic recording with weak coupling layer 失效
    用于具有弱耦合层的磁记录的反铁磁耦合介质

    公开(公告)号：US20070037017A1

    公开(公告)日：2007-02-15

    申请号：US11204979

    申请日：2005-08-15

    申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

    发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66

    摘要： An embodiment of the invention is a layered magnetic thin film structure that uses antiferromagnetically coupled (AFC) magnetic layers where the top layer structure consists of an upper magnetic layer that is weakly ferromagnetically coupled via a nonmagnetic or weakly magnetic exchange coupling layer (interlayer) to a ferromagnetic exchange enhancing layer that is in turn, AF coupled to the lower ferromagnetic layer of the AFC structure. Preferred materials for the weak coupling layer include alloys of cobalt such as CoRu, CoBRu and CoCr in which the Co content is below the point at which the material would be ferromagnetic. A second embodiment of the invention is a laminated, AF-coupled media structure. In this structure the lower AFC layer that makes up the lower laminate layer includes: the middle magnetic layer, the weak ferromagnetic coupling layer, and the exchange enhancing layer.

    摘要翻译： 本发明的一个实施例是使用反铁磁耦合（AFC）磁性层的层状磁性薄膜结构，其中顶层结构由通过非磁性或弱磁性交换耦合层（中间层）弱铁磁耦合的上部磁性层组成， 铁磁交换增强层，其依次是AF耦合到AFC结构的下铁磁层。 用于弱耦合层的优选材料包括诸如CoRu，CoBRu和CoCr的钴的合金，其中Co含量低于材料将是铁磁性的点。 本发明的第二实施例是层叠的AF耦合介质结构。 在该结构中，构成下层叠层的下部AFC层包括：中间磁性层，弱铁磁性结合层和交换增强层。

    Incoherently-reversing magnetic laminate with exchange coupled ferromagnetic layers
    8.
    发明申请
    Incoherently-reversing magnetic laminate with exchange coupled ferromagnetic layers 有权
    具有交换耦合铁磁层的不相干反磁性层压板

    公开(公告)号：US20060177700A1

    公开(公告)日：2006-08-10

    申请号：US11051536

    申请日：2005-02-04

    申请人： Eric Fullerton ,  Hoa Do ,  David Margulies ,  Natacha Supper

    发明人： Eric Fullerton ,  Hoa Do ,  David Margulies ,  Natacha Supper

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66 ,  G11B5/656 ,  Y10T428/24975

    摘要： A laminate structure is disclosed comprising multiple ferromagnetic layers achieving incoherent reversal while maintaining good SNR. A high magnetic moment density, low anisotropy field material may form a thin overlayer deposited over a high-anisotropy media layer. The media layer may have a lower magnetic moment density than the overlayer and have decoupled magnetic grains. A coupling layer may be interposed between the overlayer and the media layer to modulate the exchange there between, thereby reducing the pass-through of noise while still promoting incoherent reversal to achieve reduced write energy requirements.

    摘要翻译： 公开了一种层叠结构，其包括多个铁磁层，同时保持良好的SNR，实现非相干反转。 高磁矩密度低的各向异性场材料可以形成沉积在高各向异性介质层上的薄覆盖层。 介质层可以具有比覆盖层更低的磁矩密度并且具有去耦的磁性颗粒。 耦合层可以插入在覆盖层和介质层之间以调制其间的交换，从而减少噪声的通过，同时仍然促进不相干的反转以实现降低的写入能量需求。

    Magnetic recording system with three-layer laminated media having improved signal-to-noise ratio
    10.
    发明申请
    Magnetic recording system with three-layer laminated media having improved signal-to-noise ratio 失效
    具有提高的信噪比的具有三层层压介质的磁记录系统

    公开(公告)号：US20050259351A1

    公开(公告)日：2005-11-24

    申请号：US10853631

    申请日：2004-05-24

    申请人： Hoa Do ,  David Margulies ,  Hal Rosen ,  Natacha Supper

    发明人： Hoa Do ,  David Margulies ,  Hal Rosen ,  Natacha Supper

    IPC分类号： G11B5/66 ,  G11B17/00

    CPC分类号： G11B5/66

    摘要： A magnetic recording system uses a magnetic recording medium having a laminated magnetic structure with at least three magnetic layers, wherein the magnetic layers have decreasing intrinsic coercivity H0 with distance from the write head. The write field at the center of each magnetic layer is greater than that layer's H0. The magnetic layers have different compositions and/or thicknesses and thereby different values of H0. The alloys used in the middle and upper magnetic layers are relatively “high-moment” alloys that would not ordinarily be used in magnetic recording media because they have relatively low S0NR, but the overall S0NR of the laminated magnetic structure is improved because of the effect of lamination. The middle and upper magnetic layers can be made substantially thinner, which enables the magnetic layers to be located closer to the write head, thereby exposing each of the magnetic layers to a higher write field.

    摘要翻译： 磁记录系统使用具有至少三个磁性层的层叠磁性结构的磁记录介质，其中磁层具有与写入头距离更小的固有矫顽力H 0 0。 每个磁性层的中心处的写入场大于该层的H 0 0。 磁性层具有不同的组成和/或厚度，从而具有不同的H 0 O值。 在中上层磁性层中使用的合金是相对“高力矩”的合金，它们通常不会用于磁记录介质，因为它们具有相对较低的S O N，但总体上S 0得到改善。 可以使中上层磁性层和上磁性层实质上更薄，这使得磁层能够更靠近写入头位置，从而将每个磁性层暴露于较高的写入场。