公开(公告)号：US20090290256A1

公开(公告)日：2009-11-26

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：US07572527B2

公开(公告)日：2009-08-11

申请号：US11135703

申请日：2005-05-24

申请人： Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Margulies

发明人： Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Margulies

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/656 ,  G11B5/667 ,  G11B5/7325

摘要： A perpendicular magnetic recording disk has an antiferromagnetically-coupled (AFC) recording layer (RL) comprised of lower and upper ferromagnetic layers, each having a hexagonal-close-packed (hcp) crystalline structure and perpendicular magnetic anisotropy, separated by an antiferromagnetically (AF) coupling layer, wherein the lower ferromagnetic layer (LFM) has substantially higher magnetic permeability than the upper ferromagnetic layer (UFM). The AFC RL is located on an actual exchange break layer (EBL) that separates the AFC RL from the disk's soft magnetic underlayer (SUL). The LFM functions as part of an “effective” exchange break layer (EBL) that also includes the actual EBL and the AF-coupling layer, thereby allowing the actual EBL to be made as thin as possible. The hcp LFM promotes the growth of the hcp UFM in the same way the actual EBL does so that its thickness contributes to the thickness necessary to grow the hcp UFM. The effective EBL appears to be magnetically “thin” during the write process and magnetically “thick” during the readback process.

摘要翻译： 垂直磁记录盘具有由下铁磁层和上铁磁层组成的反铁磁耦合（AFC）记录层（RL），每个具有六方密堆积（hcp）晶体结构和垂直磁各向异性，由反铁磁（AF ）耦合层，其中下铁磁层（LFM）具有比上铁磁层（UFM）显着更高的磁导率。 AFC RL位于将AFC RL与磁盘的软磁底层（SUL）分离的实际交换中断层（EBL）上。 LFM作为“有效”交换中断层（EBL）的一部分，该层还包括实际的EBL和AF耦合层，从而使实际的EBL尽可能薄。 hcp LFM以与实际EBL相同的方式促进hcp UFM的增长，使其厚度有助于生长hcp UFM所需的厚度。 在写入过程中，有效的EBL看似磁性很薄，在回读过程中磁性“厚”。

公开(公告)号：US07572526B2

公开(公告)日：2009-08-11

申请号：US11676299

申请日：2007-02-18

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

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

IPC分类号： G11B5/66 ,  G11B5/667 ,  G11B5/716 ,  G11B5/673

CPC分类号： G11B5/66

摘要： A perpendicular magnetic recording system uses an exchange-spring type of perpendicular magnetic recording medium. The medium has a recording layer (RL) that includes a lower media layer (ML) and a multilayer exchange-spring layer (ESL) above the ML. The high anisotropy field (high-Hk) lower ML and the multilayer ESL are exchange-coupled across a coupling layer. The multilayer ESL has at least two ESLs separated by a coupling layer, with each of the ESLs having an Hk substantially less than the Hk of the ML. The exchange-spring structure with the multilayer ESL takes advantage of the fact that the write field magnitude and write field gradient vary as a function of distance from the write pole. The thicknesses and Hk values of each of the ESLs can be independently varied to optimize the overall recording performance of the medium.

摘要翻译： 垂直磁记录系统使用交换弹簧式垂直磁记录介质。 介质具有记录层（RL），其包括ML上方的下介质层（ML）和多层交换弹簧层（ESL）。 高各向异性场（high-Hk）较低的ML和多层ESL在耦合层之间交换耦合。 多层ESL具有由耦合层隔开的至少两个ESL，每个ESL具有基本上小于ML的Hk的Hk。 具有多层ESL的交换弹簧结构利用写入场幅度和写场梯度随着与写入极的距离的函数而变化的优点。 可以独立地改变每个ESL的厚度和H k值以优化介质的整体记录性能。

公开(公告)号：US07550210B2

公开(公告)日：2009-06-23

申请号：US11372295

申请日：2006-03-09

申请人： Andreas Klaus Berger ,  Hoa Van Do ,  Eric E. Fullerton ,  Yoshihiro Ikeda ,  Byron Hassberg Lengsfield, III ,  Natacha F. Supper

发明人： Andreas Klaus Berger ,  Hoa Van Do ,  Eric E. Fullerton ,  Yoshihiro Ikeda ,  Byron Hassberg Lengsfield, III ,  Natacha F. Supper

IPC分类号： G11B5/66

CPC分类号： G11B5/66

摘要： A perpendicular magnetic recording medium has an “exchange-spring” type magnetic recording layer (RL) formed of two ferromagnetic layers with substantially similar anisotropy fields that are ferromagnetically exchange-coupled by a nonmagnetic or weakly ferromagnetic coupling layer. Because the write head produces a larger magnetic field and larger field gradient at the upper portion of the RL, while the field strength decreases further inside the RL, the upper ferromagnetic layer can have a high anisotropy field. The high field and field gradient near the top of the RL, where the upper ferromagnetic layer is located, reverses the magnetization of the upper ferromagnetic layer, which then assists in the magnetization reversal of the lower ferromagnetic layer. Because both ferromagnetic layers in this exchange-spring type RL have a high anisotropy field, the thermal stability of the medium is not compromised. The medium shows improved writability, i.e., a low switching field, as well as lower intrinsic media noise, over a medium with a conventional single-layer RL.

摘要翻译： 垂直磁记录介质具有由具有基本相似的各向异性场的两个铁磁层形成的“交换弹簧”型磁记录层（RL），其通过非磁性或弱铁磁耦合层进行铁磁交换耦合。 由于写头在RL的上部产生较大的磁场和较大的场梯度，而在RL内的场强进一步降低，所以上铁磁层可以具有高的各向异性场。 在RL的顶部附近的高场磁场梯度，其中上铁磁层位于其上，反转上铁磁层的磁化，其随后有助于下铁磁层的磁化反转。 由于这种交换弹簧型RL中的两个铁磁层具有高各向异性场，所以介质的热稳定性不受影响。 在具有常规单层RL的介质上，介质显示改进的可写性，即低切换场，以及较低的固有介质噪声。

公开(公告)号：US08021769B2

公开(公告)日：2011-09-20

申请号：US11751823

申请日：2007-05-22

申请人： Andreas Klaus Berger ,  Eric E. Fullerton ,  Olav Hellwig ,  Byron Hassberg Lengsfield, III ,  Ernesto E. Marinero

发明人： Andreas Klaus Berger ,  Eric E. Fullerton ,  Olav Hellwig ,  Byron Hassberg Lengsfield, III ,  Ernesto E. Marinero

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/65 ,  G11B5/855

摘要： A patterned perpendicular magnetic recording medium has discrete magnetic islands, each of which has a recording layer (RL) structure that comprises two exchange-coupled ferromagnetic layers. The RL structure may be an “exchange-spring” RL structure with an upper ferromagnetic layer (MAG2), sometimes called the exchange-spring layer (ESL), ferromagnetically coupled to a lower ferromagnetic layer (MAG1), sometimes called the media layer (ML). The RL structure may also include a coupling layer (CL) between MAG1 and MAG2 that permits ferromagnetic coupling. The interlayer exchange coupling between MAG1 and MAG2 may be optimized, in part, by adjusting the materials and thickness of the CL. The RL structure may also include a ferromagnetic lateral coupling layer (LCL) that is in contact with at least one of MAG1 and MAG2 for mediating intergranular exchange coupling in the ferromagnetic layer or layers with which it is in contact (MAG2 or MAG1). The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy with which it is in contact (MAG2 or MAG1).

摘要翻译： 图案化的垂直磁记录介质具有离散的磁岛，每个磁岛具有包含两个交换耦合的铁磁层的记录层（RL）结构。 RL结构可以是具有上铁磁层（MAG2）的“交换弹簧”RL结构，有时称为交换弹簧层（ESL），铁磁耦合到下铁磁层（MAG1），有时称为介质层 ML）。 RL结构还可以包括允许铁磁耦合的MAG1和MAG2之间的耦合层（CL）。 可以通过调整CL的材料和厚度来部分地优化MAG1和MAG2之间的层间交换耦合。 RL结构还可以包括与MAG1和MAG2中的至少一个接触的铁磁侧向耦合层（LCL），用于介导与其接触的铁磁层（MAG2或MAG1）中的晶间交换耦合。 LCL中的铁磁合金与其接触的铁磁合金（MAG2或MAG1）具有明显更大的晶间交换耦合。

公开(公告)号：US07846565B2

公开(公告)日：2010-12-07

申请号：US12687187

申请日：2010-01-14

申请人： Eric E. Fullerton ,  Olav Hellwig

发明人： Eric E. Fullerton ,  Olav Hellwig

IPC分类号： G11B5/66

CPC分类号： G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/7325 ,  G11B5/855

摘要： A magnetic recording disk drive has a patterned perpendicular magnetic recording disk of the type that has spaced-apart pillars with magnetic material on their ends and with trenches between the pillars that are nonmagnetic regions. A nonmagnetic capping layer is located in the trenches above the nonmagnetic regions. The substrate has diffusion material in the trenches that when heated will diffuse into the magnetic recording layer material and chemically react with it. The pillars are formed of material that will not diffuse into the recording layer. The recording layer is formed over the entire substrate and a nonmagnetic capping layer that is not chemically reactive with the diffusion material is formed over the recording layer in the trenches. The substrate is annealed to cause the recording layer material in the trenches and the material in the substrate to diffuse into one another and chemically react to render the trenches nonmagnetic. The capping layer suppresses the diffusion of material from the substrate to the surface in the trenches and thus prevents migration of diffusion material to the recording layer material on the ends of the pillars.

摘要翻译： 磁记录盘驱动器具有图案化的垂直磁记录盘，其具有在其端部上具有磁性材料的间隔开的柱，并且在作为非磁性区域的柱之间的沟槽。 非磁性覆盖层位于非磁性区域上方的沟槽中。 衬底在沟槽中具有扩散材料，当加热时扩散材料将扩散到磁记录层材料中并与其发生化学反应。 支柱由不会扩散到记录层中的材料形成。 记录层形成在整个基板上，并且在沟槽中的记录层上形成与扩散材料不具有化学反应性的非磁性覆盖层。 将衬底退火以使沟槽中的记录层材料和衬底中的材料彼此扩散并进行化学反应以使沟槽成为非磁性的。 覆盖层抑制材料从衬底到沟槽表面的扩散，从而防止扩散材料向支柱端部的记录层材料迁移。

公开(公告)号：US20080274381A1

公开(公告)日：2008-11-06

申请号：US11743140

申请日：2007-05-01

申请人： Eric E. Fullerton ,  Olav Hellwig

发明人： Eric E. Fullerton ,  Olav Hellwig

IPC分类号： G11B5/706 ,  B05D5/12

CPC分类号： G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/7325 ,  G11B5/855

摘要： A patterned perpendicular magnetic recording medium of the type that has spaced-apart pillars with magnetic material on their ends and with trenches between the pillars that are nonmagnetic regions is made with a method that allows use of a pre-etched substrate. A nonmagnetic capping layer is located in the trenches above the nonmagnetic regions. The substrate has diffusion material in the trenches that when heated will diffuse into the magnetic recording layer material and chemically react with it. The pillars are formed of material that will not diffuse into the recording layer. The recording layer is formed over the entire substrate and a nonmagnetic capping layer that is not chemically reactive with the diffusion material is formed over the recording layer in the trenches. The substrate is annealed to cause the recording layer material in the trenches and the material in the substrate to diffuse into one another and chemically react to render the trenches nonmagnetic. The capping layer suppresses the diffusion of material from the substrate to the surface in the trenches and thus prevents migration of diffusion material to the recording layer material on the ends of the pillars.

摘要翻译： 具有在其端部上具有磁性材料的间隔开的柱和在非磁性区域之间的柱之间的沟槽的类型的垂直磁记录介质是通过允许使用预蚀刻的衬底的方法制成的。 非磁性覆盖层位于非磁性区域上方的沟槽中。 衬底在沟槽中具有扩散材料，当加热时扩散材料将扩散到磁记录层材料中并与其发生化学反应。 支柱由不会扩散到记录层中的材料形成。 记录层形成在整个基板上，并且在沟槽中的记录层上形成与扩散材料不具有化学反应性的非磁性覆盖层。 将衬底退火以使沟槽中的记录层材料和衬底中的材料彼此扩散并进行化学反应以使沟槽成为非磁性的。 覆盖层抑制材料从衬底到沟槽表面的扩散，从而防止扩散材料向支柱端部的记录层材料迁移。

公开(公告)号：US20080199735A1

公开(公告)日：2008-08-21

申请号：US11676299

申请日：2007-02-18

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

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

IPC分类号： G11B5/706

CPC分类号： G11B5/66

摘要： A perpendicular magnetic recording system uses an exchange-spring type of perpendicular magnetic recording medium. The medium has a recording layer (RL) that includes a lower media layer (ML) and a multilayer exchange-spring layer (ESL) above the ML. The high anisotropy field (high-Hk) lower ML and the multilayer ESL are exchange-coupled across a coupling layer. The multilayer ESL has at least two ESLs separated by a coupling layer, with each of the ESLs having an Hk substantially less than the Hk of the ML. The exchange-spring structure with the multilayer ESL takes advantage of the fact that the write field magnitude and write field gradient vary as a function of distance from the write pole. The thicknesses and Hk values of each of the ESLs can be independently varied to optimize the overall recording performance of the medium.

摘要翻译： 垂直磁记录系统使用交换弹簧式垂直磁记录介质。 介质具有记录层（RL），其包括ML上方的下介质层（ML）和多层交换弹簧层（ESL）。 较高的各向异性场（high-H k k N）较低的ML和多层ESL在耦合层之间交换耦合。 多层ESL具有由耦合层隔开的至少两个ESL，其中每个ESL具有基本上小于ML的H k k N。 具有多层ESL的交换弹簧结构利用写入场幅度和写场梯度随着与写入极的距离的函数而变化的优点。 可以独立地改变每个ESL的厚度和厚度值，以优化介质的整体记录性能。

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：US07615771B2

公开(公告)日：2009-11-10

申请号：US11380498

申请日：2006-04-27

申请人： Robert E. Fontana, Jr. ,  Eric E. Fullerton ,  Stefan Maat ,  Jan-Ulrich Thiele

发明人： Robert E. Fontana, Jr. ,  Eric E. Fullerton ,  Stefan Maat ,  Jan-Ulrich Thiele

IPC分类号： H01L27/20

CPC分类号： G11C11/16 ,  G11C11/1675

摘要： Solid-state memories are disclosed that are comprised of cross-point memory arrays. The cross-point memory arrays include a first plurality of electrically conductive lines and a second plurality of electrically conductive lines that cross over the first plurality of electrically conductive lines. The memory arrays also include a plurality of memory cells located between the first and second conductive lines. The memory cells are formed from a metallic material, such as FeRh, having the characteristic of a first order phase transition due to a change in temperature. The first order phase transition causes a corresponding change in resistivity of the metallic material.

摘要翻译： 公开了由交叉点存储器阵列组成的固态存储器。 交叉点存储器阵列包括跨越第一多个导电线的第一多个导电线和第二多个导电线。 存储器阵列还包括位于第一和第二导线之间的多个存储单元。 存储单元由诸如FeRh的金属材料形成，具有由温度变化引起的一阶相变的特性。 一阶相变导致金属材料的电阻率的相应变化。