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1.发明授权Magnetic recording medium with antiparallel coupled ferromagnetic films as the recording layer 失效具有反平行耦合铁磁膜的磁记录介质作为记录层公开(公告)号：US06723450B2
公开(公告)日：2004-04-20
申请号：US10103186
申请日：2002-03-19
申请人： Hoa Van Do , Mary F. Doerner , Eric Edward Fullerton , David Thomas Margulies , William G. McChesney , Manfred Ernst Schabes , Kai Tang
发明人： Hoa Van Do , Mary F. Doerner , Eric Edward Fullerton , David Thomas Margulies , William G. McChesney , Manfred Ernst Schabes , Kai Tang
IPC分类号： G11B566
CPC分类号： G11B5/66 , G11B5/82 , Y10T428/12646 , Y10T428/12854 , Y10T428/12861 , Y10T428/12868 , Y10T428/12889 , Y10T428/12896 , Y10T428/24967
摘要： A magnetic recording medium for data storage uses a magnetic recording layer having at least two ferromagnetic films with different remanent magnetization-thickness (Mrt) values that are coupled antiparallel across a nonferromagnetic spacer film predominantly by the dipole field (Hd) from the grains of the higher-Mrt ferromagnetic film. The material compositions and thicknesses of the ferromagnetic films and the nonferromagnetic spacer film are selected so that Hd predominates over any antiferromagnetic exchange coupling field (Haf) and is greater than the coercive field of the lower-Mrt ferromagnetic film. As a result, the magnetizations of the two ferromagnetic films are antiparallel in the two remanent magnetic states, and thus the net remanent magnetization-thickness product (Mrt) of the recording layer is the difference in the Mrt values of the two ferromagnetic films.
摘要翻译： 用于数据存储的磁记录介质使用具有至少两个铁磁膜的磁记录层，所述至少两个铁磁膜具有不同的剩余磁化厚度（Mrt）值，其主要由偶极场（Hd）与非磁性间隔膜 较高的Mrt铁磁膜。 选择铁磁膜和非铁磁隔离膜的材料组成和厚度，使得Hd优于任何反铁磁交换耦合场（Haf），并且大于下部Mrt铁磁膜的矫顽场。 结果，两个铁磁膜的磁化在两个剩余磁状态下是反平行的，因此记录层的净残磁强度 - 厚度乘积（Mrt）是两个铁磁膜的Mrt值之差。
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2.发明授权Antiferromagnetically coupled magnetic recording media with CoCrFe alloy first ferromagnetic film 有权具有CoCrFe合金第一铁磁膜的反铁磁耦合磁记录介质公开(公告)号：US06835476B2
公开(公告)日：2004-12-28
申请号：US10386834
申请日：2003-03-11
IPC分类号： G11B566
CPC分类号： G11B5/732 , G11B5/66 , G11B5/7325 , Y10S428/90 , Y10T428/12465 , Y10T428/24802 , Y10T428/24942
摘要： A magnetic recording medium for data storage uses a magnetic recording layer having at least two ferromagnetic films exchange coupled together antiferromagnetically across a nonferromagnetic spacer film. In this antiferromagnetically-coupled (AFC) recording layer the magnetic moments of the two ferromagnetic films are oriented antiparallel, and thus the net remanent magnetization-thickness product (Mrt) of the AFC recording layer is the difference in the Mrt values of the two ferromagnetic films. This reduction in Mrt is accomplished without a reduction in thermal stability of the recording medium. The lower ferromagnetic film in the AFC recording layer is a ferromagnetic CoCrFe alloy that does not require a nucleation layer between it and the Cr alloy underlayer. The medium with the CoCrFe alloy as the first or lower ferromagnetic film in the AFC recording layer has reduced intrinsic media noise.
摘要翻译： 用于数据存储的磁记录介质使用具有至少两个铁磁膜的磁记录层，它们通过非铁磁间隔膜反铁磁交换耦合在一起。 在这种反铁磁耦合（AFC）记录层中，两个铁磁性膜的磁矩反平行取向，因此，AFC记录层的净残余磁化厚度乘积（Mrt）是两个铁磁性膜的Mrt值之差 电影。 在不损失记录介质的热稳定性的情况下实现了Mrt的这种减少。 AFC记录层中的下铁磁膜是铁基CoCrFe合金，其不需要在其与Cr合金底层之间的成核层。 具有CoCrFe合金作为AFC记录层中的第一或更低铁磁性膜的介质降低了本征介质噪声。
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3.发明授权Magnetic recording media with antiferromagnetically coupled host layer for the magnetic recording layer 失效用于磁记录层的具有反铁磁耦合主机层的磁记录介质公开(公告)号：US06383668B1
公开(公告)日：2002-05-07
申请号：US09536868
申请日：2000-03-27
申请人： Eric Edward Fullerton , David Thomas Margulies , Ernesto Esteban Marinero , Manfred Ernst Schabes
发明人： Eric Edward Fullerton , David Thomas Margulies , Ernesto Esteban Marinero , Manfred Ernst Schabes
IPC分类号： G11B566
CPC分类号： G11B5/66 , Y10S428/90
摘要： A magnetic recording disk has a magnetic recording layer formed on a special multilayered “host” layer. The host layer is a “synthetic antiferromagnetically”, i.e., at least two ferromagnetic films that are exchange-coupled antiferromagnetically (AF) to one another across a nonferromagnetic spacer film so that their magnetic moments are oriented antiparallel. The magnetic recording layer has a different composition from the top ferromagnetic film in the host layer and is ferromagnetically coupled to the top ferromagnetic film of the host layer. The magnetic volume V of the composite structure (magnetic recording layer and host layer) that determines the thermal stability will be approximately the sum of the volumes of the grains in the magnetic recording layer and the AF-coupled ferromagnetic films of the host layer. However, the magnetic moment of the composite structure is primarily just the moment from the magnetic recording layer because the host layer is designed to have essentially no net magnetic moment.
摘要翻译： 磁记录盘具有形成在特殊多层“主体”层上的磁记录层。 主体层是“合成的反铁磁性”，即至少两个铁磁膜，其通过非铁磁隔离膜彼此交互耦合反铁磁（AF），使得它们的磁矩反向取向。 磁记录层与主体层中的顶部铁磁膜具有不同的组成，并与主体层的顶部铁磁膜铁磁耦合。 确定热稳定性的复合结构（磁记录层和主体层）的磁体积V将近似为磁记录层中的晶粒的体积和主体层的AF耦合铁磁性膜之和。 然而，复合结构的磁矩主要仅在磁记录层的时刻，因为主体层被设计成基本上没有净磁矩。
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4.发明授权Magnetic media with ferromagnetic overlay materials for improved thermal stability 有权具有铁磁覆盖材料的磁性介质，用于改善热稳定性公开(公告)号：US06440589B1
公开(公告)日：2002-08-27
申请号：US09324606
申请日：1999-06-02
申请人： Eric Edward Fullerton , David Thomas Margulies , Ernesto Esteban Marinero , Manfred Ernst Schabes
发明人： Eric Edward Fullerton , David Thomas Margulies , Ernesto Esteban Marinero , Manfred Ernst Schabes
IPC分类号： G11B566
CPC分类号： G11B5/66 , G11B5/746 , Y10S428/90 , Y10T428/24942 , Y10T428/265
摘要： A magnetic recording disk has a magnetic recording layer that includes a ferromagnetic host layer and a ferromagnetic overlay deposited directly on the host layer with an effective overlay thickness in the range of 1-40 Angstroms. The ferromagnetic material used in the overlay contains Co, Fe and/or Ni and has a magnetic moment significantly greater than that of the material in the ferromagnetic host layer. The ferromagnetic overlays improve the thermal stability of superparamagnetic grains contained within the host layers by magnetically coupling the grains through bridging. The enhanced thermal stability of the media allows for the use of thinner ferromagnetic host layers, and leads to lower remanent magnetization-thickness product (Mrt) values and higher recording densities.
摘要翻译： 磁记录盘具有磁记录层，该磁记录层包括铁磁性主体层和直接沉积在主体层上的铁磁覆层，其有效覆盖厚度在1-40埃的范围内。 在覆盖层中使用的铁磁材料包含Co，Fe和/或Ni，并且具有显着大于铁磁性主体层中的材料的磁矩的磁矩。 铁磁覆盖层通过桥接磁耦合晶粒来改善主体层中所含的超顺磁性晶粒的热稳定性。 介质的增强的热稳定性允许使用更薄的铁磁性主体层，并且导致较低的剩余磁化 - 厚度乘积（Mrt）值和更高的记录密度。
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5.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
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。
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6.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
IPC分类号： 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。
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7.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
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。
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8.发明授权公开(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
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。
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9.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
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。
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10.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
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。
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