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1.发明授权MR sensor and thin film media having alloyed Ru antiparallel spacer layer for enhanced antiparallel exchange coupling 失效MR传感器和薄膜介质具有合金化Ru反平行间隔层，用于增强反向平行交换耦合公开(公告)号：US07382590B2
公开(公告)日：2008-06-03
申请号：US11047801
申请日：2005-01-31
IPC分类号： G11B5/39
CPC分类号： G11B5/3906 , B82Y25/00 , G01R33/093 , G11B5/3909 , G11B2005/3996 , H01F10/3272
摘要： A magnetic head having a free layer and an antiparallel (AP) pinned layer structure spaced apart from the free layer. The AP pinned layer structure includes at least two pinned layers having magnetic moments that are self-pinned antiparallel to each other, the pinned layers being separated by an AP coupling layer constructed of a Ru alloy. The use of a Ru alloy coupling layer significantly increases the pinning field of the AP pinned layer structure over a pure Ru spacer.
摘要翻译： 具有自由层和与自由层间隔开的反平行（AP）钉扎层结构的磁头。 AP钉扎层结构包括至少两个具有彼此自相互并联的磁矩的钉扎层，钉扎层由由Ru合金构成的AP耦合层分开。 使用Ru合金耦合层显着增加了AP固定层结构在纯Ru间隔物上的钉扎场。
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2.发明授权Antiferromagnetically coupled magnetic recording media with boron-free first ferromagnetic film as nucleation layer 有权具有无硼第一铁磁膜的反铁磁耦合磁记录介质作为成核层公开(公告)号：US06537684B1
公开(公告)日：2003-03-25
申请号：US09631908
申请日：2000-08-04
IPC分类号： G11B566
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/24942 , Y10T428/2495 , Y10T428/265
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 boron-free ferromagnetic CoCr alloy that does not require a nucleation layer between it and the Cr alloy underlayer. The ferromagnetic CoCr alloy has sufficient saturation magnetization (Ms) to produce excellent magnetic recording performance for the AFC recording layer, while also serving as a template or nucleation layer to induce the growth of the spacer layer and top ferromagnetic boron-containing ferromagnetic film.
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记录层中的低铁磁性膜是不需要其与Cr合金底层之间的成核层的无硼铁磁CoCr合金。 铁磁CoCr合金具有足够的饱和磁化强度（Ms），以便为AFC记录层产生优良的磁记录性能，同时也用作模板或成核层以诱导间隔层和顶部铁磁性含硼铁磁膜的生长。
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公开(公告)号：US07989096B2
公开(公告)日：2011-08-02
申请号：US12691603
申请日：2010-01-21
IPC分类号： G11B5/66
摘要： A recording medium providing improved writeability in perpendicular recording applications includes a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof, an exchange-spring layer ferromagnetically exchange coupled to the magnetic recording layer and having a coercivity less than the magnetic recording layer coercivity, and a coupling layer between the magnetic recording layer and the exchange-spring layer. The coupling layer regulates the ferromagnetic exchange coupling between the magnetic recording layer and the exchange-spring layer.
摘要翻译： 在垂直记录应用中提供改善的写入能力的记录介质包括具有基本上垂直于其表面的磁各向异性轴的磁记录层，耦合到磁记录层并具有小于磁记录的矫顽磁力的磁性交换弹簧层 层矫顽力和磁记录层与交换弹簧层之间的耦合层。 耦合层调节磁记录层与交换弹簧层之间的铁磁交换耦合。
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4.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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5.发明申请MAGNETIC RECORDING SYSTEM WITH MEDIUM HAVING ANTIFERROMAGNETIC-TO- FERROMAGNETIC TRANSITION LAYER EXCHANGE-COUPLED TO RECORDING LAYER 审中-公开磁记录系统，具有与抗磁反应转移层交换耦合到记录层的介质公开(公告)号：US20080100964A1
公开(公告)日：2008-05-01
申请号：US11553215
申请日：2006-10-26
CPC分类号： G11B5/64 , G11B5/1278 , G11B5/3103
摘要： A magnetic recording disk drive has a bilayer recording medium of a high-anisotropy recording layer and an exchange-coupled antiferromagnetic-to-ferromagnetic (AF-F) transition layer. The transition layer has an AF-F transition temperature (TAF-F) that decreases relatively rapidly with increasing applied magnetic field. Thus the transition layer has a transition field HAF-F(T), which is the applied magnetic field required to transition the material from antiferromagnetic to ferromagnetic at temperature T without the need to heat the layer. At ambient temperature and in the absence of HW, the transition layer is antiferromagnetic and the switching field H0 of the bilayer is just the H0 of the high-anisotropy recording layer, which is typically much higher than HW. In the presence of the write field HW the transition layer transitions from antiferromagnetic to ferromagnetic so that data can be written to the recording by the mere application of the write field HW without the need to heat the transition layer or recording layer. The transition layer may be formed of Fe(RhM), where M is an element selected from V, Mn, Au and Ni.
摘要翻译： 磁记录盘驱动器具有高各向异性记录层和交换耦合的反铁磁到铁磁（AF-F）过渡层的双层记录介质。 过渡层具有随着施加的磁场增加而相对快速地减小的AF-F转变温度（T AF AF F F）。 因此，过渡层具有过渡场H AF-F（T），其是在温度T下将材料从反铁磁转变为铁磁所需的施加磁场，而不需要加热该层。 在环境温度下和在不存在的情况下，过渡层是反铁磁性的，并且双层的开关场H 0正好是H
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6.发明授权Exchange-coupled magnetoresistive sensor with a coercive ferrite layer and an oxide underlayer having a spinal lattice structure 失效具有矫顽铁氧体层和具有脊椎晶格结构的氧化物底层的交换耦合磁阻传感器公开(公告)号：US06992866B2
公开(公告)日：2006-01-31
申请号：US10931315
申请日：2004-08-31
申请人： Matthew Joseph Carey , Eric Edward Fullerton , Bruce Alvin Gurney , Thai Le , Stefan Maat , Philip Milton Rice
发明人： Matthew Joseph Carey , Eric Edward Fullerton , Bruce Alvin Gurney , Thai Le , Stefan Maat , Philip Milton Rice
IPC分类号： G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/012 , G11B5/3903 , G11B5/3967 , H01F10/3277
摘要： An exchange-coupled magnetic structure includes a ferromagnetic layer, a coercive ferrite layer, such as cobalt-ferrite, for biasing the magnetization of the ferromagnetic layer, and an oxide underlayer, such as cobalt-oxide, in proximity to the coercive ferrite layer. The oxide underlayer has a lattice structure of either rock salt or a spinel and exhibits no magnetic moment at room temperature. The underlayer affects the structure of the coercive ferrite layer and therefore its magnetic properties, providing increased coercivity and enhanced thermal stability. As a result, the coercive ferrite layer is thermally stable at much smaller thicknesses than without the underlayer. The exchange-coupled structure is used in spin valve and magnetic tunnel junction magnetoresistive sensors in read heads of magnetic disk drive systems. Because the coercive ferrite layer can be made as thin as 1 nm while remaining thermally stable, the sensor satisfies the narrow gap requirements of high recording density systems.
摘要翻译： 交换耦合磁性结构包括强磁性层，用于偏置铁磁性层的磁化的钴铁氧体的矫顽铁氧体层以及邻近矫顽铁氧体层的氧化钴底层，例如氧化钴。 氧化物底层具有岩盐或尖晶石的晶格结构，并且在室温下不显示磁矩。 底层影响矫顽铁氧体层的结构，因此影响其磁特性，提供增强的矫顽力和增强的热稳定性。 结果，矫顽铁氧体层的热稳定性比没有底层要小得多的厚度。 交换耦合结构用于磁盘驱动系统读磁头中的自旋阀和磁隧道结磁阻传感器。 由于矫顽铁氧体层可以制成1nm的薄而保持热稳定性，所以传感器满足高记录密度系统的窄间隙要求。
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7.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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8.发明授权Heat assisted switching in an MRAM cell utilizing the antiferromagnetic to ferromagnetic transition in FeRh 有权利用FeRh中的反铁磁性铁磁转变，在MRAM单元中进行热辅助切换公开(公告)号：US07372116B2
公开(公告)日：2008-05-13
申请号：US10869315
申请日：2004-06-16
CPC分类号： G11C11/16 , G11C11/1675
摘要： A magnetic memory cell for use in a magnetic random access memory array that uses the antiferromagnetic to ferromagnetic transition properties of FeRh to assist in the control of switching of the memory cell.
摘要翻译： 一种用于磁随机存取存储器阵列的磁存储单元，其使用FeRh的反铁磁性铁磁转变特性来协助控制存储器单元的切换。
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9.发明授权Stability-enhancing underlayer for exchange-coupled magnetic structures, magnetoresistive sensors, and magnetic disk drive systems 有权用于交换耦合磁性结构的稳定性增强型底层，磁阻传感器和磁盘驱动系统公开(公告)号：US06836392B2
公开(公告)日：2004-12-28
申请号：US09841942
申请日：2001-04-24
申请人： Matthew Joseph Carey , Eric Edward Fullerton , Bruce Alvin Gurney , Thai Le , Stefan Maat , Philip Milton Rice
发明人： Matthew Joseph Carey , Eric Edward Fullerton , Bruce Alvin Gurney , Thai Le , Stefan Maat , Philip Milton Rice
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/012 , G11B5/3903 , G11B5/3967 , H01F10/3277
摘要： An exchange-coupled magnetic structure includes a ferromagnetic layer, a coercive ferrite layer, such as cobalt-ferrite, for biasing the magnetization of the ferromagnetic layer, and an oxide underlayer, such as cobalt-oxide, in proximity to the coercive ferrite layer. The oxide underlayer has a lattice structure of either rock salt or a spinel and exhibits no magnetic moment at room temperature. The underlayer affects the structure of the coercive ferrite layer and therefore its magnetic properties, providing increased coercivity and enhanced thermal stability. As a result, the coercive ferrite layer is thermally stable at much smaller thicknesses than without the underlayer. The exchange-coupled structure is used in spin valve and magnetic tunnel junction magnetoresistive sensors in read heads of magnetic disk drive systems. Because the coercive ferrite layer can be made as thin as 1 nm while remaining thermally stable, the sensor satisfies the narrow gap requirements of high recording density systems.
摘要翻译： 交换耦合磁性结构包括强磁性层，用于偏置铁磁性层的磁化的钴铁氧体的矫顽铁氧体层以及邻近矫顽铁氧体层的氧化钴底层，例如氧化钴。 氧化物底层具有岩盐或尖晶石的晶格结构，并且在室温下不显示磁矩。 底层影响矫顽铁氧体层的结构，因此影响其磁特性，提供增强的矫顽力和增强的热稳定性。 结果，矫顽铁氧体层的热稳定性比没有底层要小得多的厚度。 交换耦合结构用于磁盘驱动系统读磁头中的自旋阀和磁隧道结磁阻传感器。 由于矫顽铁氧体层可以制成1nm的薄而保持热稳定性，所以传感器满足高记录密度系统的窄间隙要求。
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10.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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