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    Perpendicular magnetic recording medium and system with low-curie-temperature multilayer for heat-assisted writing and/or reading
    1.
    发明授权
    Perpendicular magnetic recording medium and system with low-curie-temperature multilayer for heat-assisted writing and/or reading 有权
    垂直磁记录介质和具有低Curie-temperature多层的系统，用于热辅助写入和/或读取

    公开(公告)号：US07862912B2

    公开(公告)日：2011-01-04

    申请号：US12041930

    申请日：2008-03-04

    申请人： Olav Hellwig ,  Bruce David Terris ,  Jan-Ulrich Thiele

    发明人： Olav Hellwig ,  Bruce David Terris ,  Jan-Ulrich Thiele

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66 ,  Y10T428/1171

    摘要： A perpendicular magnetic recording medium, usable for either continuous or patterned media, has a recording layer structure (RLS) of first and second perpendicular magnetic layers (PM1, PM2) and an antiferromagnetically coupling (AFC) layer and a ferromagnetic switching layer (SWL) between PM1 and PM2. The magnetic recording system uses heat to assist in the reading and/or writing of data. The SWL is a Co/Ni multilayer with a Curie temperature (TC-SWL) less than the Curie temperatures of PM1 and PM2. At room temperature, there is ferromagnetic coupling between SWL and the upper ferromagnetic layer (PM2) so that the magnetizations of SWL and PM2 are parallel, and antiferromagnetic coupling between SWL and the lower ferromagnetic layer (PM1) across the AFC layer so that the magnetization of PM1 is aligned antiparallel to the magnetizations of SWL and PM2. When the SWL is heated to above TC-SWL it is no longer ferromagnetic, there is no antiferromagnetic coupling between the SWL and PM1 across the AFC layer, and the magnetizations of PM1 and PM2 become aligned parallel.

    摘要翻译： 可用于连续或图案化介质的垂直磁记录介质具有第一和第二垂直磁性层（PM1，PM2）和反铁磁耦合（AFC）层和铁磁性切换层（SWL）的记录层结构（RLS） PM1和PM2之间。 磁记录系统使用热量来辅助读取和/或写入数据。 SWL是具有低于PM1和PM2的居里温度的居里温度（TC-SWL）的Co / Ni多层。 在室温下，在SWL和上铁磁层（PM2）之间存在铁磁耦合，使得SWL和PM2的磁化平行，并且SWL与AFC层之间的下铁磁层（PM1）之间的反铁磁耦合，使得磁化 的PM1与SWL和PM2的磁化反平行排列。 当SWL被加热到高于TC-SWL时，它不再是铁磁性的，在AFC层之间的SWL和PM1之间没有反铁磁耦合，并且PM1和PM2的磁化平行排列。

    PERPENDICULAR MAGNETIC RECORDING MEDIUM AND SYSTEM WITH LOW-CURIE-TEMPERATURE MULTILAYER FOR HEAT-ASSISTED WRITING AND/OR READING
    2.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIUM AND SYSTEM WITH LOW-CURIE-TEMPERATURE MULTILAYER FOR HEAT-ASSISTED WRITING AND/OR READING 有权
    具有低温度温度的多层磁性记录介质和系统，用于热辅助写入和/或读取

    公开(公告)号：US20090226762A1

    公开(公告)日：2009-09-10

    申请号：US12041930

    申请日：2008-03-04

    申请人： Olav Hellwig ,  Bruce David Terris ,  Jan-Ulrich Thiele

    发明人： Olav Hellwig ,  Bruce David Terris ,  Jan-Ulrich Thiele

    IPC分类号： G11B5/65

    CPC分类号： G11B5/66 ,  Y10T428/1171

    摘要： A perpendicular magnetic recording medium, usable for either continuous or patterned media, has a recording layer structure (RLS) of first and second perpendicular magnetic layers (PM1, PM2) and an antiferromagnetically coupling (AFC) layer and a ferromagnetic switching layer (SWL) between PM1 and PM2. The magnetic recording system uses heat to assist in the reading and/or writing of data. The SWL is a Co/Ni multilayer with a Curie temperature (TC-SWL) less than the Curie temperatures of PM1 and PM2. At room temperature, there is ferromagnetic coupling between SWL and the upper ferromagnetic layer (PM2) so that the magnetizations of SWL and PM2 are parallel, and antiferromagnetic coupling between SWL and the lower ferromagnetic layer (PM1) across the AFC layer so that the magnetization of PM1 is aligned antiparallel to the magnetizations of SWL and PM2. When the SWL is heated to above TC-SWL it is no longer ferromagnetic, there is no antiferromagnetic coupling between the SWL and PM1 across the AFC layer, and the magnetizations of PM1 and PM2 become aligned parallel.

    摘要翻译： 可用于连续或图案化介质的垂直磁记录介质具有第一和第二垂直磁性层（PM1，PM2）和反铁磁耦合（AFC）层和铁磁性切换层（SWL）的记录层结构（RLS） PM1和PM2之间。 磁记录系统使用热量来辅助读取和/或写入数据。 SWL是具有低于PM1和PM2的居里温度的居里温度（TC-SWL）的Co / Ni多层。 在室温下，在SWL和上铁磁层（PM2）之间存在铁磁耦合，使得SWL和PM2的磁化平行，并且SWL与AFC层之间的下铁磁层（PM1）之间的反铁磁耦合，使得磁化 的PM1与SWL和PM2的磁化反平行排列。 当SWL被加热到高于TC-SWL时，它不再是铁磁性的，在AFC层之间的SWL和PM1之间没有反铁磁耦合，并且PM1和PM2的磁化平行排列。

    Thermally-assisted perpendicular magnetic recording system and head
    3.
    发明授权
    Thermally-assisted perpendicular magnetic recording system and head 失效
    热辅助垂直磁记录系统和头

    公开(公告)号：US07068453B2

    公开(公告)日：2006-06-27

    申请号：US10789907

    申请日：2004-02-27

    申请人： Bruce David Terris ,  Jan-Ulrich Thiele

    发明人： Bruce David Terris ,  Jan-Ulrich Thiele

    IPC分类号： G11B5/02

    CPC分类号： G11B5/315 ,  G11B5/1278 ,  G11B5/314 ,  G11B5/3967 ,  G11B2005/0021

    摘要： A thermally-assisted perpendicular magnetic recording head includes a write pole tip for generating a magnetic write field in the perpendicular magnetic recording layer, a magnetic shield that confines the write field essentially to the data track to be recorded, an electrically resistive heater for heating the recording layer in the presence of the write field, and a return pole. The write pole tip width essentially defines data track width and is substantially surrounded by the magnetic shield. The shield may include side shields with ends located on opposite sides of the write pole tip and a trailing shield having an end spaced from the write pole tip. The resistive heater is wider than the data track and heats both the data track and adjacent tracks, but thermally-assisted magnetic recording occurs only in the data track because the confined magnetic field in the adjacent tracks is less than the required write field.

    摘要翻译： 热辅助垂直磁记录头包括用于在垂直磁记录层中产生磁写入场的写磁极端头，将写磁场基本上限制于要记录的数据磁道的磁屏蔽，用于加热 在存在写字段的情况下，记录层和返回极。 写极尖宽度基本上限定数据磁道宽度并且基本上被磁屏蔽包围。 屏蔽件可以包括端部位于写入磁极尖端的相对侧上的侧部屏蔽件，以及具有与写入磁极尖端间隔开的端部的后屏蔽件。 电阻加热器比数据轨道宽，并加热数据轨道和相邻轨道，但热辅助磁记录仅发生在数据轨道中，因为相邻轨道中的受限磁场小于所需的写入场。

    MEMORY ARRAY HAVING MEMORY CELLS FORMED FROM METALLIC MATERIAL
    6.
    发明申请
    MEMORY ARRAY HAVING MEMORY CELLS FORMED FROM METALLIC MATERIAL 有权
    具有从金属材料形成的记忆细胞的记忆阵列

    公开(公告)号：US20070253243A1

    公开(公告)日：2007-11-01

    申请号：US11380498

    申请日：2006-04-27

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

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

    IPC分类号： G11C11/14

    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。

    Magnetic recording disk drive with laminated media and improved media signal-to-noise ratio
    7.
    发明授权
    Magnetic recording disk drive with laminated media and improved media signal-to-noise ratio 失效
    具有层压介质的磁记录磁盘驱动器和改进的介质信噪比

    公开(公告)号：US06989952B2

    公开(公告)日：2006-01-24

    申请号：US10620542

    申请日：2003-07-15

    申请人： David T. Margulies ,  Andreas Moser ,  Hal J. Rosen ,  Jan-Ulrich Thiele

    发明人： David T. Margulies ,  Andreas Moser ,  Hal J. Rosen ,  Jan-Ulrich Thiele

    IPC分类号： G11B5/02

    CPC分类号： G11B5/012 ,  G11B5/656 ,  G11B5/66 ,  G11B5/82 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/001 ,  G11B2005/0016 ,  G11B2005/0021

    摘要： A magnetic recording disk drive has an inductive write head and a heater to record data in laminated media on the recording disk. The laminated media, with at least two ferromagnetic layers separated by a nonmagnetic spacer layer, improves SNR. Each of the ferromagnetic layers can be formed of a material having an intrinsic coercivity capable of being written by a conventional inductive write head, but because of the desired lamination to increase SNR, the ferromagnetic layer farthest from the write head is exposed to a magnetic field less than its intrinsic coercivity and thus can not be written. To write to the laminated media, heat is directed to the lower ferromagnetic layer to reduce its intrinsic coercivity below the magnetic field to which it is exposed.

    摘要翻译： 磁记录磁盘驱动器具有感应写头和加热器，用于在记录盘上的叠层介质中记录数据。 具有由非磁性间隔层隔开的至少两个铁磁层的层压介质提高了SNR。 每个铁磁层可以由具有能够由常规感应写头写入的固有矫顽力的材料形成，但是由于期望的叠层以增加SNR，所以从写头最远的铁磁层暴露于磁场 小于其内在矫顽力，因此不能写出。 为了写入层压介质，将热量导向下铁磁层，以将它的固有矫顽力降低到暴露于其下的磁场。

    Method for making horizontal magnetic recording media having grains of chemically-ordered FePt or CoPt
    8.
    发明授权
    Method for making horizontal magnetic recording media having grains of chemically-ordered FePt or CoPt 失效
    制造具有化学有序FePt或CoPt晶粒的水平磁记录介质的方法

    公开(公告)号：US6007623A

    公开(公告)日：1999-12-28

    申请号：US920550

    申请日：1997-08-29

    申请人： Jan-Ulrich Thiele ,  Dieter Klaus Weller

    发明人： Jan-Ulrich Thiele ,  Dieter Klaus Weller

    IPC分类号： G11B5/64 ,  G11B5/73 ,  G11B5/84 ,  G11B5/851 ,  C30B23/00

    CPC分类号： G11B5/732 ,  G11B5/653 ,  G11B5/656 ,  G11B5/8404 ,  G11B5/851

    摘要： A method for producing a horizontal magnetic recording medium that has as its magnetic film a granular film with grains of a chemically-ordered FePt or FePtX (or CoPt or CoPtX) alloy in the tetragonal L1.sub.0 structure uses an etched seed layer beneath the granular film. The granular magnetic film reveals a very high magnetocrystalline anisotropy within the individual grains. The film is produced by sputtering from a single alloy target or cosputtering from several targets. The granular structure and the chemical ordering are controlled by means of sputter parameters, e.g., temperature and deposition rate, and by the use of the etched seed layer that provides a structure for the subsequently sputter-deposited granular magnetic film. The structure of the seed layer is obtained by sputter etching, plasma etching, ion irradiation, or laser irradiation. The magnetic properties, i.e., H.sub.c and areal moment density M.sub.r t, are controlled by the granularity (grain size and grain distribution), the degree of chemical ordering, and the addition of one or more nonmagnetic materials, such as Cr, Ag, Cu, Ta, or B. The resulting granular magnetic film has magnetic properties suitable for application in high-density, horizontal magnetic recording media.

    摘要翻译： 在四方晶L10结构中使用具有化学有序FePt或FePtX（或CoPt或CoPtX）合金晶粒的颗粒膜作为其磁性膜的水平磁记录介质的制造方法使用粒状膜下方的蚀刻种子层。 颗粒状磁性膜显示各晶粒内的非常高的磁晶各向异性。 该膜通过从单个合金靶溅射或从几个靶的共溅射制造。 颗粒结构和化学排序通过溅射参数（例如温度和沉积速率）以及通过使用提供随后溅射沉积的颗粒状磁性膜的结构的蚀刻种子层来控制。 种子层的结构通过溅射蚀刻，等离子体蚀刻，离子照射或激光照射获得。 磁特性，即Hc和面积密度Mrt由颗粒度（晶粒尺寸和晶粒分布），化学排序程度以及添加一种或多种非磁性材料如Cr，Ag，Cu， Ta或B.所得粒状磁性膜具有适用于高密度水平磁记录介质的磁性能。

    Heat sink layer
    9.
    发明授权
    Heat sink layer 有权
    散热层

    公开(公告)号：US08576672B1

    公开(公告)日：2013-11-05

    申请号：US13481207

    申请日：2012-05-25

    申请人： Chubing Peng ,  Edward Charles Gage ,  Ganping Ju ,  Jan-Ulrich Thiele ,  Kaizhong Gao

    发明人： Chubing Peng ,  Edward Charles Gage ,  Ganping Ju ,  Jan-Ulrich Thiele ,  Kaizhong Gao

    IPC分类号： G11B11/00

    CPC分类号： G11B5/7325 ,  G11B2005/0021

    摘要： A layer configured for use in a magnetic stack has electrical resistivity greater than about 5×10−8 Ωm and thermal conductivity greater than about 1 W/mK. In some arrangements, the magnetic stack includes a substrate with the layer disposed over the substrate, a magnetic recording layer disposed over the layer, and a thermal resist layer disposed between the layer and the magnetic recording layer. In some arrangements, the layer is configured to function as a heat sink and a soft under layer. A system that incorporates the layer can include a magnetic write pole, a near field transducer (NFT) positioned proximate the write pole that radiates energy.

    摘要翻译： 配置用于磁性堆叠的层具有大于约5×10 -8Ωgam的电阻率和大于约1W / mK的热导率。 在一些布置中，磁性堆叠包括具有设置在衬底上的层的衬底，设置在层上的磁记录层，以及设置在层和磁记录层之间的热阻层。 在一些布置中，该层被配置为用作散热器和软底层。 结合该层的系统可以包括磁性写入磁极，靠近写入磁极的辐射能量的近场传感器（NFT）。