公开(公告)号：US07125616B2

公开(公告)日：2006-10-24

申请号：US10788687

申请日：2004-02-26

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

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

IPC分类号： G11B5/66

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（LL 1，LL 2，LL 3）和上铁磁层（UL），所有四个铁磁层在相应的反铁磁层上反铁磁耦合在一起 - 耦合层。 UL具有大于三个下层LL 1，LL 2，LL 3中的每一个的Mrt的磁化剩磁厚度乘积（Mrt），并且大于LL 1和LL 3的Mrt值之和。 中下层LL 2的Mrt小于其他下层LL 1和LL 3中的每一个的Mrt，结果，AFC结构的复合Mrt小于仅具有传统AFC结构的复合材料Mrt 单个下层。 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。

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。

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：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。

公开(公告)号：US20090155627A1

公开(公告)日：2009-06-18

申请号：US11956389

申请日：2007-12-14

申请人： Andreas Klaus Berger ,  Eric Edward Fullerton ,  Byron Hassberg Lengsfield, III ,  James Terrence Olson

发明人： Andreas Klaus Berger ,  Eric Edward Fullerton ,  Byron Hassberg Lengsfield, III ,  James Terrence Olson

IPC分类号： G11B5/62 ,  G11B5/84

CPC分类号： G11B5/66

摘要： A media architecture is optimized for discrete track recording. A capped or exchange-spring media uses a thin media structure and incorporates higher moment density magnetic layers. A thin exchange coupling layer is used in conjunction with a cap layer to control the reversal mechanism and exchange. Thus, the exchange coupling layer mediates the interaction between the two outer magnetic layers. The thickness of the exchange coupling layer is tuned by monitoring the media signal-to-noise ratio, track width and bit error rate. The recording performance is enhanced by tuning the intergranular exchange in the system through the use of the high-moment cap as writeability, resolution and noise are improved.

摘要翻译： 媒体架构针对离散轨道记录进行了优化。 封盖或交换弹簧介质使用薄介质结构并且结合较高的力矩密度磁层。 薄交换耦合层与盖层结合使用以控制反转机制和交换。 因此，交换耦合层介导两个外磁层之间的相互作用。 通过监测介质信噪比，轨道宽度和误码率来调整交换耦合层的厚度。 通过使用高功率上限作为可写性来调整系统中的晶间交换，提高了记录性能，提高了分辨率和噪声。

公开(公告)号：USRE40726E1

公开(公告)日：2009-06-09

申请号：US10630818

申请日：2003-07-29

申请人： Eric Edward Fullerton ,  Bruce David Terris ,  Dieter Klaus Weller

发明人： Eric Edward Fullerton ,  Bruce David Terris ,  Dieter Klaus Weller

IPC分类号： G11B5/66

CPC分类号： B82Y10/00 ,  G11B5/66 ,  G11B5/743 ,  Y10T428/24942 ,  Y10T428/2495

摘要： A magnetic recording disk is patterned into discrete magnetic and nonmagnetic regions with the magnetic regions serving as the magnetic recording data bits. The magnetic recording layer comprises two ferromagnetic films separated by a nonferromagnetic spacer film. The spacer film material composition and thickness is selected such that the first and second ferromagnetic films are antiferromagnetically coupled across the spacer film. After this magnetic recording layer has been formed on the disk substrate, ions are irradiated onto it through a patterned mask. The ions disrupt the spacer film and thereby destroy the antiferromagnetic coupling between the two ferromagnetic films. As a result, in the regions of the magnetic recording layer that are ion-irradiated the first and second ferromagnetic films are essentially ferromagnetically coupled so that the magnetic moments from the ferromagnetic films are parallel and produce a magnetic moment that is essentially the sum of the moments from the two films. In the non-irradiated regions of the magnetic recording layer, the first and second ferromagnetic films remain antiferromagnetically coupled so that their magnetic moments are oriented antiparallel. The composition and thicknesses of the first and second ferromagnetic films are selected such that essentially no magnetic field is detectable at a predetermined distance above the magnetic recording layer corresponding to the height that the magnetic recording head would be located.

公开(公告)号：US06893741B2

公开(公告)日：2005-05-17

申请号：US10602504

申请日：2003-06-24

申请人： Mary F. Doerner ,  Eric Edward Fullerton

发明人： Mary F. Doerner ,  Eric Edward Fullerton

IPC分类号： C22C38/00 ,  G01R33/09 ,  G11B5/00 ,  G11B5/39 ,  G11B5/66 ,  G11C11/15 ,  H01F10/16 ,  H01F10/32 ,  H01L43/08 ,  H01L43/10 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/66 ,  G11B2005/001 ,  G11C11/15 ,  H01F10/324 ,  H01L43/10 ,  Y10T428/12875 ,  Y10T428/12931 ,  Y10T428/2495

摘要： The invention is a magnetic device, i.e., a magnetoresistive sensor or a magnetic tunnel junction device, that has a ferromagnetic structure of two ferromagnetic layers antiferromagnetically coupling together with an improved antiferromagnetically coupling (AFC) film. The AFC film is an alloy of Ru100-xFex where x is between approximately 10 and 60 atomic percent. This AFC film increases the exchange coupling by up to a factor or two and has an hcp crystalline structure making it compatible with Co alloy ferromagnetic layers.

摘要翻译： 本发明是具有与改进的反铁磁耦合（AFC）膜反铁磁耦合在一起的两个铁磁层的铁磁结构的磁性装置，即磁阻传感器或磁性隧道结装置。 AFC膜是其中x在约10和60原子百分比之间的Ru 100-x Fe x X x的合金。 这种AFC膜将交换耦合增加高达一个或两个，并且具有hcp晶体结构，使其与Co合金铁磁层相容。

公开(公告)号：US06835476B2

公开(公告)日：2004-12-28

申请号：US10386834

申请日：2003-03-11

申请人： Hoa Van Do ,  Mary F. Doerner ,  Eric Edward Fullerton ,  David T. Margulies ,  Natacha F. Supper

发明人： Hoa Van Do ,  Mary F. Doerner ,  Eric Edward Fullerton ,  David T. Margulies ,  Natacha F. Supper

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。

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：US06391430B1

公开(公告)日：2002-05-21

申请号：US09602609

申请日：2000-06-21

申请人： Eric Edward Fullerton ,  Bruce David Terris ,  Dieter Klaus Weller

发明人： Eric Edward Fullerton ,  Bruce David Terris ,  Dieter Klaus Weller

IPC分类号： B32B702

CPC分类号： B82Y10/00 ,  G11B5/66 ,  G11B5/743 ,  Y10T428/24942 ,  Y10T428/2495

摘要： A magnetic recording disk is patterned into discrete magnetic and nonmagnetic regions with the magnetic regions serving as the magnetic recording data bits. The magnetic recording layer comprises two ferromagnetic films separated by a nonferromagnetic spacer film. The spacer film material composition and thickness is selected such that the first and second ferromagnetic films are antiferromagnetically coupled across the spacer film. After this magnetic recording layer has been formed on the disk substrate, ions are irradiated onto it through a patterned mask. The ions disrupt the spacer film and thereby destroy the antiferromagnetic coupling between the two ferromagnetic films. As a result, in the regions of the magnetic recording layer that are ion-irradiated the first and second ferromagnetic films are essentially ferromagnetically coupled so that the magnetic moments from the ferromagnetic films are parallel and produce a magnetic moment that is essentially the sum of the moments from the two films. In the non-irradiated regions of the magnetic recording layer, the first and second ferromagnetic films remain antiferromagnetically coupled so that their magnetic moments are oriented antiparallel. The composition and thicknesses of the first and second ferromagnetic films are selected such that essentially no magnetic field is detectable at a predetermined distance above the magnetic recording layer corresponding to the height that the magnetic recording head would be located.

摘要翻译： 将磁记录盘图案化成具有磁区用作磁记录数据位的离散磁和非磁性区域。 磁记录层包括由非铁磁隔离膜隔开的两个铁磁膜。 选择间隔膜材料组成和厚度使得第一和第二铁磁膜跨隔离膜反铁磁耦合。 在磁盘基板上形成磁记录层之后，通过图形掩模将离子照射到其上。 离子破坏间隔膜，从而破坏两个铁磁膜之间的反铁磁耦合。 结果，在离子照射的磁记录层的区域中，第一和第二铁磁膜基本上是铁磁耦合的，使得来自铁磁性膜的磁矩平行并产生磁矩，其基本上是 两部影片的片刻。 在磁记录层的未照射区域中，第一和第二铁磁膜保持反铁磁耦合，使得它们的磁矩反向取向。 选择第一和第二铁磁膜的组成和厚度，使得在对应于磁记录头将被定位的高度的磁记录层上方的预定距离处基本上不可检测到磁场。