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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。

    Magnetic recording system with patterned multilevel perpendicular magnetic recording
    5.
    发明授权
    Magnetic recording system with patterned multilevel perpendicular magnetic recording 失效
    具有图案多层垂直磁记录的磁记录系统

    公开(公告)号：US06906879B1

    公开(公告)日：2005-06-14

    申请号：US10727703

    申请日：2003-12-03

    申请人： Manfred Albrecht ,  Olav Hellwig ,  Guohan Hu ,  Bruce David Terris

    发明人： Manfred Albrecht ,  Olav Hellwig ,  Guohan Hu ,  Bruce David Terris

    IPC分类号： G11B5/64 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/127 ,  G11B5/31 ,  G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/673 ,  G11B5/738 ,  G11B5/82 ,  G11B5/855

    CPC分类号： G11B5/66 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/855 ,  G11B2005/0021

    摘要： A magnetic recording system, such as a magnetic recording disk drive, uses a patterned perpendicular magnetic recording medium where each magnetic block or island contains a stack of individual magnetic cells to provide multilevel recording. Each cell in an island is formed of a material or set of materials to provide the cell with perpendicular magnetic anisotropy and is a single magnetic domain. Each cell is magnetically decoupled from the other cells in its island by nonmagnetic spacer layers. Thus each cell can have a magnetization (magnetic moment) in one of two directions (into or out of the plane of the layer making up the cell), and this magnetization is independent of the magnetization of the other cells in its island, This permits multiple magnetic levels or states to be recorded in each magnetic island.

    摘要翻译： 诸如磁记录盘驱动器的磁记录系统使用图案化的垂直磁记录介质，其中每个磁块或岛包含单个磁性单元的堆叠以提供多级记录。 岛中的每个单元由材料或材料组成，以向单元提供垂直的磁各向异性并且是单个磁畴。 每个单元通过非磁性间隔层与其岛中的其它单元磁耦合。 因此，每个电池可以在两个方向之一（进入或离开构成电池的层的平面）中具有磁化（磁矩），并且该磁化独立于其岛中的其他电池的磁化。这允许 要记录在每个磁岛中的多个磁级或状态。

    Ion beam definition of magnetoresistive field sensors
    6.
    发明授权
    Ion beam definition of magnetoresistive field sensors 失效
    磁阻场传感器的离子束定义

    公开(公告)号：US06884632B2

    公开(公告)日：2005-04-26

    申请号：US10765545

    申请日：2004-01-26

    申请人： John Edward Eric Baglin ,  Liesl Folks ,  Bruce Alvin Gurney ,  Bruce David Terris

    发明人： John Edward Eric Baglin ,  Liesl Folks ,  Bruce Alvin Gurney ,  Bruce David Terris

    IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/31 ,  G11B5/39 ,  H01F10/32 ,  H01L21/00

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3909 ,  G11B2005/0016 ,  G11B2005/3996 ,  H01F10/3254 ,  H01F10/3259 ,  H01F10/3268 ,  H01F10/3272

    摘要： A magnetoresistive (MR) sensor can be shaped using ion beam irradiation and/or implantation through a mask introduced between a MR structure and an ion source. The mask covers selected portions of the MR structure to define the track width of the sensor. Ion irradiation and/or implantation reduces the magnetoresistance of the unmasked portions while leaving the masked portion substantially unaltered. The mask can be a photoresist mask, an electron beam resist mask, or a stencil mask. Alternatively the mask may be part of a projection ion beam system. Track width resolution is determined at the mask production step. The edges of the sensor can be defined by a highly collimated ion beam producing an extremely straight transition edge, which reduces sensor noise and improves sensor track width control. Improved hard bias layers that directly abut the sensor may be used to achieve a suitable stability. A variety of longitudinal bias schemes are compatible with ion beam patterning.

    摘要翻译： 可以使用离子束照射和/或通过在MR结构和离子源之间引入的掩模注入来形成磁阻（MR）传感器。 掩模覆盖MR结构的所选部分以限定传感器的轨道宽度。 离子照射和/或注入降低未掩蔽部分的磁阻，同时使掩蔽部分基本上保持不变。 掩模可以是光致抗蚀剂掩模，电子束抗蚀剂掩模或模板掩模。 或者，掩模可以是投影离子束系统的一部分。 轨迹宽度分辨率在掩模生产步骤中确定。 传感器的边缘可以由高度准直的离子束限定，产生非常直的过渡边缘，这降低了传感器噪声并提高了传感器轨道宽度控制。 可以使用直接邻接传感器的改进的硬偏压层来实现合适的稳定性。 各种纵向偏置方案与离子束图案相容。

    Patterned magnetic recording media containing chemically-ordered FePt of CoPt
    7.
    发明授权
    Patterned magnetic recording media containing chemically-ordered FePt of CoPt 有权
    含有化学有序FePt或CoPt的图案化磁记录介质

    公开(公告)号：US06331364B1

    公开(公告)日：2001-12-18

    申请号：US09350803

    申请日：1999-07-09

    申请人： John Edward Eric Baglin ,  Andrew John Kellock ,  Bruce David Terris ,  Dieter Klaus Weller ,  Liesl Folks

    发明人： John Edward Eric Baglin ,  Andrew John Kellock ,  Bruce David Terris ,  Dieter Klaus Weller ,  Liesl Folks

    IPC分类号： G11B566

    CPC分类号： G11B5/653 ,  G11B5/656 ,  G11B5/746 ,  G11B5/82 ,  G11B5/855 ,  Y10S428/90

    摘要： A patterned magnetic recording disk, i.e., a disk with discrete magnetically recordable regions that can function as discrete magnetic bits, is formed by ion irradiating a continuous magnetic film of a chemically-ordered alloy having a tetragonal crystalline structure through a patterned non-contact mask. The ions cause disordering in the film and produce regions in the film that have no magnetocrystalline anisotropy. The regions of the film not impacted by the ions retain their chemical ordering and magnetocrystalline anisotropy and thus serve as the discrete magnetic regions that can be recorded as individual magnetic bits. The chemically-ordered alloy is preferably Co (or Fe) and Pt (or Pd) with the c-axis of the tetragonal crystalline film oriented at an angle less than 45 degrees relative to the plane of the film, so that after patterning the discrete magnetic regions can be recorded by horizontal magnetic recording.

    摘要翻译： 通过离子辐射具有四方晶体结构的化学有序合金的连续磁性膜，通过图案化的非接触掩模来形成图案化的磁记录盘，即具有可用作离散磁头的离散可磁记录区域的磁盘 。 离子引起薄膜中的无序化并产生不具有磁晶各向异性的膜中的区域。 不受离子影响的膜的区域保留其化学排序和磁晶各向异性，并且因此用作可以记录为单个磁性位的离散磁性区域。 化学有序合金优选是Co（或Fe）和Pt（或Pd），其中四方晶体膜的c轴相对于膜的平面定向成小于45度的角度，使得在图案化之后离散 可以通过水平磁记录来记录磁区。