公开(公告)号：US20080138662A1

公开(公告)日：2008-06-12

申请号：US11567908

申请日：2006-12-07

申请人： Andreas Klaus Berger ,  Qing Dai ,  Hoa Van Do ,  Yoshihiro Ikeda ,  David Thomas Margulies ,  Natacha F. Supper ,  Kentaro Takano ,  Min Xiao

发明人： Andreas Klaus Berger ,  Qing Dai ,  Hoa Van Do ,  Yoshihiro Ikeda ,  David Thomas Margulies ,  Natacha F. Supper ,  Kentaro Takano ,  Min Xiao

IPC分类号： G11B5/706

CPC分类号： G11B5/66 ,  G11B5/65

摘要： A perpendicular magnetic recording medium has a multilayer recording layer (RL) structure that includes a ferromagnetic intergranular exchange enhancement layer for mediating intergranular exchange coupling in the other ferromagnetic layers in the RL structure. The RL structure may be a multilayer of a first ferromagnetic layer (MAG1) of granular polycrystalline Co alloy with Ta-oxide, a second ferromagnetic layer (MAG2) of granular polycrystalline Co alloy with Si-oxide, and an oxide-free CoCr capping layer on top of and in contact with MAG2 for mediating intergranular exchange coupling in MAG1 and MAG2. The RL structure may also be a multilayer of an intergranular exchange enhancement interlayer (IL) in between two ferromagnetic layers, MAG1 and MAG2, each with reduced or no intergranular exchange coupling. Because the IL is in direct contact with both MAG1 and MAG2, it directly mediates intergranular exchange coupling in each of MAG1 and MAG2.

摘要翻译： 垂直磁记录介质具有多层记录层（RL）结构，其包括用于介导RL结构中的其它铁磁层中的晶间交换耦合的铁磁晶间交换增强层。 RL结构可以是具有Ta氧化物的粒状多晶Co合金的第一铁磁层（MAG1），具有Si氧化物的粒状多晶Co合金的第二铁磁层（MAG 2）和不含无氧化物的CoCr的多层 在MAG1和MAG2之间介导晶间交换耦合的MAG 2顶部并与MAG 2接触的封盖层.RR结构还可以是两个铁磁层之间的晶间交换增强中间层（IL）的多层，MAG 1和MAG 2，每个都有减少或没有晶间交换耦合。 因为IL与MAG 1和MAG 2直接接触，所以它直接介导MAG1和MAG2中的每一个中的晶间交换耦合。

公开(公告)号：US06928723B2

公开(公告)日：2005-08-16

申请号：US10746021

申请日：2003-12-23

申请人： Matthew Joseph Carey ,  Hoa Van Do ,  Robin Frederick Charles Farrow ,  Bruce Alvin Gurney ,  David Thomas Margulies ,  Ronald Franklin Marks ,  Philip Milton Rice ,  Ren Xu

发明人： Matthew Joseph Carey ,  Hoa Van Do ,  Robin Frederick Charles Farrow ,  Bruce Alvin Gurney ,  David Thomas Margulies ,  Ronald Franklin Marks ,  Philip Milton Rice ,  Ren Xu

IPC分类号： G01R33/09 ,  G11B5/012 ,  G11B5/39 ,  H01F10/32 ,  H01F41/30 ,  G11B5/127 ,  H04R31/00

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  B82Y40/00 ,  G01R33/093 ,  G11B5/012 ,  G11B5/3932 ,  G11B5/3967 ,  H01F10/3268 ,  H01F41/302 ,  Y10T29/49032 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49071

摘要： An exchange-coupled magnetic structure of a cobalt-ferrite layer adjacent a magnetic metal layer is used in magnetorestive sensors, such as spin valves or tunnel junction valves. The exchange-coupled magnetic structure is used in a pinning structure pinning the magnetization of a ferromagnetic pinned layer, or in an AP pinned layer. A low coercivity ferrite may be used in an AP free layer. Cobalt-ferrite layers may be formed by co-sputtering of Co and Fe in an oxygen/argon gas mixture, or by sputtering of a CoFe2 composition target in an oxygen/argon gas mixture. Alternatively, the cobalt-ferrite layer may be formed by evaporation of Co and Fe from an alloy source or separate sources along with a flux of oxygen atoms from a RF oxygen atom beam source. Magnetoresistive sensors including cobalt-ferrite layers have small read gaps and produce large signals with high efficiency.

摘要翻译： 邻近磁性金属层的钴铁氧体层的交换耦合磁性结构被用于诸如自旋阀或隧道结阀的磁力回转传感器中。 交换耦合磁结构用于钉扎铁磁钉扎层或AP钉扎层的磁化的钉扎结构。 低矫顽力铁氧体可用于AP自由层。 钴 - 铁氧体层可以通过在氧/氩气混合物中共同溅射Co和Fe，或者通过在氧/氩气混合物中溅射CoFe 2 N 2组合物靶来形成。 或者，钴 - 铁素体层可以通过从合金源蒸发Co和Fe以及来自RF氧原子束源的氧原子束的分离源来形成。 包括钴 - 铁氧体层的磁阻传感器具有小的读取间隙，并产生高效率的大信号。

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。

公开(公告)号：US06537684B1

公开(公告)日：2003-03-25

申请号：US09631908

申请日：2000-08-04

申请人： Mary Frances Doerner ,  Eric Edward Fullerton ,  David Thomas Margulies

发明人： Mary Frances Doerner ,  Eric Edward Fullerton ,  David Thomas Margulies

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。

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。

公开(公告)号：US07588841B2

公开(公告)日：2009-09-15

申请号：US11736525

申请日：2007-04-17

申请人： Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Thomas Margulies

发明人： Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Thomas Margulies

IPC分类号： G11B5/66

CPC分类号： G11B5/82 ,  G11B5/02 ,  G11B5/66 ,  G11B2005/0005 ,  G11B2005/0029

摘要： A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG1 and MAG2), each with perpendicular magnetic anisotropy. MAG1 and MAG2 may have a coupling layer (CL) located between them that permits ferromagnetic exchange coupling of MAG1 with MAG2. The LCL is located either above or below MAG1 and in direct contact with MAG1 and mediates an effective intergranular exchange coupling in MAG1. The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy in MAG1, which typically will include segregants such as oxides. The LCL is preferably free of oxides or other non-metallic segregants, which would tend to reduce intergranular exchange coupling in the LCL. Because the LCL grain boundaries overlay the boundaries of the generally segregated and decoupled grains of MAG1, and the LCL and MAG1 grains are strongly coupled perpendicularly, the LCL introduces an effective intergranular exchange coupling in the MAG1.

摘要翻译： 垂直磁记录系统和介质具有包括交换弹簧结构和铁磁横向耦合层（LCL）的多层记录层。 交换弹簧结构由两个铁磁交换磁性层（MAG1和MAG2）组成，每个具有垂直的磁各向异性。 MAG1和MAG2可以具有位于它们之间的耦合层（CL），其允许MAG1与MAG2的铁磁交换耦合。 LCL位于MAG1上方或下方，与MAG1直接接触，并介导MAG1中有效的晶间交换耦合。 LCL中的铁磁合金具有比MAG1中的铁磁合金明显更大的晶间交换耦合，其通常将包括分离子如氧化物。 LCL优选不含氧化物或其它非金属分离剂，其倾向于减少LCL中的晶间交换偶联。 因为LCL晶界覆盖了MAG1的大致分离和去耦晶粒的边界，并且LCL和MAG1晶粒垂直强耦合，所以LCL在MAG1中引入有效的晶间交换耦合。

公开(公告)号：US20080261078A1

公开(公告)日：2008-10-23

申请号：US11736525

申请日：2007-04-17

申请人： Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield ,  David Thomas Margulies

发明人： Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield ,  David Thomas Margulies

IPC分类号： G11B5/33

CPC分类号： G11B5/82 ,  G11B5/02 ,  G11B5/66 ,  G11B2005/0005 ,  G11B2005/0029

摘要： A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG1 and MAG2), each with perpendicular magnetic anisotropy. MAG1 and MAG2 may have a coupling layer (CL) located between them that permits ferromagnetic exchange coupling of MAG1 with MAG2. The LCL is located either above or below MAG1 and in direct contact with MAG1 and mediates an effective intergranular exchange coupling in MAG1. The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy in MAG1, which typically will include segregants such as oxides. The LCL is preferably free of oxides or other non-metallic segregants, which would tend to reduce intergranular exchange coupling in the LCL. Because the LCL grain boundaries overlay the boundaries of the generally segregated and decoupled grains of MAG1, and the LCL and MAG1 grains are strongly coupled perpendicularly, the LCL introduces an effective intergranular exchange coupling in the MAG1.

摘要翻译： 垂直磁记录系统和介质具有包括交换弹簧结构和铁磁横向耦合层（LCL）的多层记录层。 交换弹簧结构由两个铁磁交换磁性层（MAG 1和MAG 2）组成，每个具有垂直的磁各向异性。 MAG 1和MAG 2可以具有位于它们之间的耦合层（CL），其允许MAG 1与MAG 2的铁磁交换耦合。 LCL位于MAG 1上方或下方，并与MAG 1直接接触，并介导MAG 1中有效的晶间交换耦合。 LCL中的铁磁合金具有比MAG1中的铁磁合金明显更大的晶间交换耦合，其通常将包括分离子如氧化物。 LCL优选不含氧化物或其它非金属分离剂，其倾向于减少LCL中的晶间交换偶联。 因为LCL晶界覆盖了MAG1的大体分离和去耦晶粒的边界，并且LCL和MAG1晶粒被垂直强耦合，所以LCL在MAG 1中引入有效的晶间交换耦合。

公开(公告)号：US07846563B2

公开(公告)日：2010-12-07

申请号：US12534181

申请日：2009-08-03

申请人： Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Thomas Margulies

发明人： Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Thomas Margulies

IPC分类号： G11B5/127 ,  G11B5/00

CPC分类号： G11B5/82 ,  G11B5/02 ,  G11B5/66 ,  G11B2005/0005 ,  G11B2005/0029

摘要： A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG1 and MAG2), each with perpendicular magnetic anisotropy. MAG1 and MAG2 may have a coupling layer (CL) located between them that permits ferromagnetic exchange coupling of MAG1 with MAG2. The LCL is located either above or below MAG1 and in direct contact with MAG1 and mediates an effective intergranular exchange coupling in MAG1. The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy in MAG1, which typically will include segregants such as oxides. The LCL is preferably free of oxides or other non-metallic segregants, which would tend to reduce intergranular exchange coupling in the LCL. Because the LCL grain boundaries overlay the boundaries of the generally segregated and decoupled grains of MAG1, and the LCL and MAG1 grains are strongly coupled perpendicularly, the LCL introduces an effective intergranular exchange coupling in the MAG1.

摘要翻译： 垂直磁记录系统和介质具有包括交换弹簧结构和铁磁横向耦合层（LCL）的多层记录层。 交换弹簧结构由两个铁磁交换磁性层（MAG1和MAG2）组成，每个具有垂直的磁各向异性。 MAG1和MAG2可以具有位于它们之间的耦合层（CL），其允许MAG1与MAG2的铁磁交换耦合。 LCL位于MAG1上方或下方，与MAG1直接接触，并介导MAG1中有效的晶间交换耦合。 LCL中的铁磁合金具有比MAG1中的铁磁合金显着更大的晶间交换耦合，其通常将包括分离子如氧化物。 LCL优选不含氧化物或其它非金属分离剂，其倾向于减少LCL中的晶间交换偶联。 因为LCL晶界覆盖了MAG1的大致分离和去耦晶粒的边界，并且LCL和MAG1晶粒垂直强耦合，所以LCL在MAG1中引入有效的晶间交换耦合。

公开(公告)号：US20080144213A1

公开(公告)日：2008-06-19

申请号：US11611766

申请日：2006-12-15

申请人： Andreas Klaus Berger ,  David Thomas Margulies ,  Natacha F. Supper

发明人： Andreas Klaus Berger ,  David Thomas Margulies ,  Natacha F. Supper

IPC分类号： G11B5/127 ,  G11B5/66

CPC分类号： G11B5/66 ,  B82Y10/00 ,  G11B5/65 ,  G11B5/743

摘要： A perpendicular magnetic recording layer (RL) structure has multiple granular ferromagnetic layers (MAGs) that are separated by ferromagnetic exchange-coupling layers (ECLs) as interlayers between the MAGS. The ECLs provide effective intergranular exchange-coupling in the MAGs. Each MAG is sufficiently thick to support independent recording states that are thermally stable, and does not rely on the overall RL thickness for thermal stability. Each ECL has significant intralayer coupling of its grains. The material of the ECL may be a CoCr alloy, such as a CoCrPtB alloy. The Cr and B in the ECL create sam11 segregation regions or sub-grains in the ECL that are exchange-coupled on a length-scale smaller than the grain size. For each MAG grain, there exist a multitude of magnetic states corresponding to different transition positions in the ECL. These magnetic states are metastable and can be produced by a recording process, which in turn allows the RL structure to support a stable magnetization pattern with different magnetization states in adjacent MAGs. Thus, the magnetization states of the various MAGs may be fully correlated, but need not be fully correlated.

摘要翻译： 垂直磁记录层（RL）结构具有由铁磁交换耦合层（ECL）分隔的多个粒状铁磁层（MAG）作为MAGS之间的夹层。 ECL在MAG中提供有效的晶间交换耦合。 每个MAG足够厚以支持热稳定的独立记录状态，并且不依赖于整体RL厚度以获得热稳定性。 每个ECL都具有显着的晶粒内部耦合作用。 ECL的材料可以是CoCr合金，例如CoCrPtB合金。 ECL中的Cr和B产生在ECL中的sam11偏析区域或亚晶粒，其在比晶粒尺寸小的长度尺度上交换耦合。 对于每个MAG晶粒，存在对应于ECL中的不同转变位置的多个磁状态。 这些磁状态是亚稳态的，并且可以通过记录过程产生，这又允许RL结构支持相邻MAG中具有不同磁化状态的稳定磁化模式。 因此，各种MAG的磁化状态可以是完全相关的，但不需要完全相关。

公开(公告)号：US06803119B2

公开(公告)日：2004-10-12

申请号：US09952822

申请日：2001-09-13

申请人： David Thomas Margulies ,  Timothy Martin Reith ,  Hoa Do ,  Tim Minvielle ,  James A. Hagan

发明人： David Thomas Margulies ,  Timothy Martin Reith ,  Hoa Do ,  Tim Minvielle ,  James A. Hagan

IPC分类号： G11B582

CPC分类号： G11B5/7315 ,  G11B5/012 ,  Y10T428/12944 ,  Y10T428/24355 ,  Y10T428/265

摘要： This invention provides a disk which has an in-plane oriented magnetic recording layer on a glass, ceramic, or other nonmetal substrate and a method for making the disc. A thin layer of texturable NiP is sputtered on the substrate. This NiP layer is textured before the magnetic layer is deposited. The disk combines all the advantages of a glass or ceramic substrate along with the advantages of an oriented magnetic medium.

摘要翻译： 本发明提供一种在玻璃，陶瓷或其它非金属基板上具有面内定向磁记录层的盘，以及制造该盘的方法。 在衬底上溅射薄层可纹理的NiP。 在沉积磁性层之前，该NiP层被纹理化。 该盘结合玻璃或陶瓷基板的所有优点以及定向磁性介质的优点。