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    Laminated magnetic thin films for magnetic recording with weak ferromagnetic coupling
    1.
    发明授权
    Laminated magnetic thin films for magnetic recording with weak ferromagnetic coupling 有权
    具有弱铁磁耦合的磁记录层压磁薄膜

    公开(公告)号：US08263239B2

    公开(公告)日：2012-09-11

    申请号：US11475281

    申请日：2006-06-26

    申请人： Andreas Klaus Berger ,  Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique Supper

    发明人： Andreas Klaus Berger ,  Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique Supper

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66 ,  G11B5/84

    摘要： A laminated magnetic recording structure for use in perpendicular or longitudinal recording is described. A small amount of ferromagnetic coupling is added between the two magnetic layers that are sufficiently decoupled to switch independently. In one embodiment the coupling is achieved by doping the spacer layer with a ferromagnetic material. Ruthenium (Ru), which is a preferred nonmagnetic material for spacer layers with cobalt (Co) being the preferred magnetic material. The weak ferromagnetic coupling can also be achieved through the use of platinum, palladium and alloys thereof for the spacer layer without the addition of a ferromagnetic element, but alternatively they can also be doped with ferromagnetic elements. For embodiments for perpendicular recording the spacer layer further can additionally comprise oxides of one or more elements selected from the group consisting of Si, Ta, Ti, Nb, Cr, V and B.

    摘要翻译： 描述了用于垂直或纵向记录的层叠磁记录结构。 在两个磁性层之间添加少量铁磁耦合，这两个磁性层被充分地去耦以独立地开关。 在一个实施例中，通过用铁磁材料掺杂间隔层来实现耦合。 钌（Ru），其是用于具有钴（Co）的优选磁性材料的间隔层的优选非磁性材料。 弱铁磁耦合也可以通过使用铂，钯及其合金作为间隔层，而不添加铁磁性元件，但也可以掺杂铁磁元件。 对于垂直记录的实施例，间隔层还可另外包含选自Si，Ta，Ti，Nb，Cr，V和B中的一种或多种元素的氧化物。

    Disk drive with laminated magnetic thin films with sublayers for magnetic recording
    2.
    发明授权
    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：US07976964B2

    公开(公告)日：2011-07-12

    申请号：US11084402

    申请日：2005-03-18

    申请人： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique Supper

    发明人： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique 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。

    Antiferromagnetically coupled media for magnetic recording with weak coupling layer
    3.
    发明授权
    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：US07556870B2

    公开(公告)日：2009-07-07

    申请号：US11204979

    申请日：2005-08-15

    申请人： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique Supper

    发明人： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique 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： 本发明的一个实施方案是使用反铁磁耦合（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。

    Laminated magnetic thin films for magnetic recording with weak ferromagnetic coupling
    4.
    发明申请
    Laminated magnetic thin films for magnetic recording with weak ferromagnetic coupling 有权
    具有弱铁磁耦合的磁记录层压磁薄膜

    公开(公告)号：US20070298285A1

    公开(公告)日：2007-12-27

    申请号：US11475281

    申请日：2006-06-26

    申请人： Andreas Klaus Berger ,  Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique Supper

    发明人： Andreas Klaus Berger ,  Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique Supper

    IPC分类号： G11B5/66 ,  B05D5/12

    CPC分类号： G11B5/66 ,  G11B5/84

    摘要： A laminated magnetic recording structure for use in perpendicular or longitudinal recording is described. A small amount of ferromagnetic coupling is added between the two magnetic layers that are sufficiently decoupled to switch independently. In one embodiment the coupling is achieved by doping the spacer layer with a ferromagnetic material. Ruthenium (Ru), which is a preferred nonmagnetic material for spacer layers with cobalt (Co) being the preferred magnetic material. The weak ferromagnetic coupling can also be achieved through the use of platinum, palladium and alloys thereof for the spacer layer without the addition of a ferromagnetic element, but alternatively they can also be doped with ferromagnetic elements. For embodiments for perpendicular recording the spacer layer further can additionally comprise oxides of one or more elements selected from the group consisting of Si, Ta, Ti, Nb, Cr, V and B.

    摘要翻译： 描述了用于垂直或纵向记录的层叠磁记录结构。 在两个磁性层之间添加少量铁磁耦合，这两个磁性层被充分地去耦以独立地开关。 在一个实施例中，通过用铁磁材料掺杂间隔层来实现耦合。 钌（Ru），其是用于具有钴（Co）的优选磁性材料的间隔层的优选非磁性材料。 弱铁磁耦合也可以通过使用铂，钯及其合金作为间隔层，而不添加铁磁性元件，但也可以掺杂铁磁元件。 对于垂直记录的实施例，间隔层还可另外包含选自Si，Ta，Ti，Nb，Cr，V和B中的一种或多种元素的氧化物。

    Laminated magnetic recording media with antiferromagnetically coupled layers as the individual magnetic layers in the laminate
    5.
    发明授权
    Laminated magnetic recording media with antiferromagnetically coupled layers as the individual magnetic layers in the laminate 失效
    具有反铁磁耦合层的叠层磁记录介质作为层压板中的各个磁性层

    公开(公告)号：US06372330B1

    公开(公告)日：2002-04-16

    申请号：US09626097

    申请日：2000-07-26

    申请人： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Hal Jervis Rosen

    发明人： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Hal Jervis Rosen

    IPC分类号： G11B566

    CPC分类号： C23C28/021 ,  C23C28/023 ,  C23C28/42 ,  G11B5/66 ,  Y10T428/24942 ,  Y10T428/2495

    摘要： A laminated magnetic recording medium for data storage uses a magnetic recording layer having at least two antiferromagnetically-coupled (AFC) layers spaced apart by a nonferromagnetic spacer layer. Each AFC layer is formed as two ferromagnetic films antiferromagnetically coupled together across an antiferromagnetically coupling film that has a composition and thickness to induce antiferromagnetic coupling of the second film to the first film. The magnetic moments of the two antiferromagnetically-coupled films in each AFC layer are oriented antiparallel, and thus the net remanent magnetization-thickness product (Mrt) of each AFC layer is the difference in the Mrt values of the two ferromagnetic films. The nonferromagnetic spacer layer between neighboring AFC layers has a composition and thickness to prevent any antiferromagnetic coupling of the ferromagnetic films of one AFC layer with the ferromagnetic films of the neighboring AFC layer.

    摘要翻译： 用于数据存储的叠层磁记录介质使用具有至少两个由非铁磁隔离层隔开的反铁磁耦合（AFC）层的磁记录层。 每个AFC层形成为两个铁磁膜，其通过具有组成和厚度的反铁磁耦合膜反铁磁耦合在一起，以诱导第二膜与第一膜的反铁磁耦合。 每个AFC层中的两个反铁磁耦​​合膜的磁矩定向反平行，因此每个AFC层的净残磁强度 - 厚度积（Mrt）是两个铁磁膜的Mrt值之差。 相邻AFC层之间的非铁磁间隔层具有防止一个AFC层的铁磁膜与相邻AFC层的铁磁膜的任何反铁磁耦合的组成和厚度。

    Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminate
    6.
    发明授权
    Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminate 失效
    具有反铁磁耦合层的叠层磁记录介质作为层压板中的单个磁性层之一

    公开(公告)号：US06773834B2

    公开(公告)日：2004-08-10

    申请号：US10059527

    申请日：2002-01-29

    申请人： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Hal Jervis Rosen

    发明人： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Hal Jervis Rosen

    IPC分类号： G11B566

    CPC分类号： C23C28/021 ,  C23C28/023 ,  C23C28/42 ,  C23C28/44 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/265

    摘要： A laminated magnetic recording medium for data storage has an antiferromagnetically-coupled (AFC) layer and a single ferromagnetic layer spaced apart by a nonferromagnetic spacer layer. The AFC layer is formed as two ferromagnetic films antiferromagnetically coupled together across an antiferromagnetically coupling film that has a composition and thickness to induce antiferromagnetic coupling. In each of the two remanent magnetic states, the magnetic moments of the two antiferromagnetically-coupled films in the AFC layer are oriented antiparallel, and the magnetic moment of the single ferromagnetic layer and the greater-moment ferromagnetic film of the AFC layer are oriented parallel. The nonferromagnetic spacer layer between the AFC layer and the single ferromagnetic layer has a composition and thickness to prevent antiferromagnetic exchange coupling. The laminated medium has improved thermal stability and reduced intrinsic media noise.

    摘要翻译： 用于数据存储的叠层磁记录介质具有反铁磁耦合（AFC）层和由非铁磁隔离层隔开的单个铁磁层。 AFC层由反铁磁耦合膜反铁磁耦合在一起的两个铁磁膜形成，其具有组成和厚度以诱导反铁磁耦合。 在两个剩余磁状态中的每一个中，AFC层中的两个反铁磁耦​​合膜的磁矩取向反平行，并且单个铁磁层的磁矩和AFC层的较大时刻铁磁膜的取向平行 。 AFC层和单个铁磁层之间的非铁磁间隔层具有防铁磁交换耦合的组成和厚度。 层压介质具有改善的热稳定性和降低的本征介质噪声。

    Method and apparatus for improving signal-to-noise ratio in longitudinal recording media
    8.
    发明授权
    Method and apparatus for improving signal-to-noise ratio in longitudinal recording media 失效
    用于提高纵向记录介质中信噪比的方法和装置

    公开(公告)号：US07479332B2

    公开(公告)日：2009-01-20

    申请号：US11073890

    申请日：2005-03-07

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

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

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66 ,  G11B5/732 ,  G11B5/7325 ,  G11B5/851

    摘要： A method and apparatus for improving the signal-to-noise ratio in a longitudinal recording media is disclosed. The apparatus includes a first recording layer of the longitudinal recording media residing at the top of a recording media structure. The first recording layer includes an upper sublayer comprised of a CoPtCrB-based alloy material. The first recording layer also includes a lower sublayer comprised of a CoPtCrB-based alloy material and a middle sublayer comprised of a CoCrB-alloy. The middle sublayer is coupled to the upper sublayer and to the lower sublayer and is substantially thinner than the upper sublayer and the lower sublayer.

    摘要翻译： 公开了一种用于改善纵向记录介质中的信噪比的方法和装置。 该装置包括位于记录介质结构顶部的纵向记录介质的第一记录层。 第一记录层包括由CoPtCrB基合金材料构成的上层。 第一记录层还包括由CoPtCrB基合金材料和由CoCrB合金构成的中间子层构成的下层。 中间子层耦合到上子层和下子层，并且基本上比上子层和下子层更薄。

    Incoherently-reversing magnetic laminate with exchange coupled ferromagnetic layers
    9.
    发明授权
    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：US07425377B2

    公开(公告)日：2008-09-16

    申请号：US11051536

    申请日：2005-02-04

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

    发明人： Eric Edward Fullerton ,  Hoa Van Do ,  David Thomas 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。