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1.发明授权公开(公告)号：US07128987B2
公开(公告)日：2006-10-31
申请号：US10337103
申请日：2003-01-06
申请人： Rene Johannes Marinus van de Veerdonk , Duane Clifford Karns , Dieter Klaus Weller , Yukiko Kubota
发明人： Rene Johannes Marinus van de Veerdonk , Duane Clifford Karns , Dieter Klaus Weller , Yukiko Kubota
CPC分类号： G11B5/66
摘要： Multilayer magnetic structures comprising composite layers and spacer layers are disclosed. The composite layers include a discontinuous magnetic phase such as Co, Ni or Fe platelets, and a continuous nonmagnetic phase such as C, AlOx, SiOx, ZrOx, Cu, Ag and Au. The spacer layers may comprise Pt, Pd, Au or the like. The composite layers and spacer layers may be made by sputtering. The multilayer structures are useful as magnetic recording layers of magnetic recording media. In one embodiment, the recording media comprises a perpendicular magnetic recording medium including a substrate, a soft magnetic underlayer, a seed layer and the multilayer structure.
摘要翻译： 公开了包括复合层和间隔层的多层磁性结构。 复合层包括不连续的磁性相，例如Co，Ni或Fe片晶，以及连续的非磁性相如C，AlO x，SiO x x，ZrO 3， x，Cu，Ag和Au。 间隔层可以包括Pt，Pd，Au等。 复合层和间隔层可以通过溅射制成。 多层结构可用作磁记录介质的磁记录层。 在一个实施例中，记录介质包括垂直磁记录介质，其包括基底，软磁性底层，种子层和多层结构。
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公开(公告)号：US07041394B2
公开(公告)日：2006-05-09
申请号：US10005244
申请日：2001-12-03
IPC分类号： G11B5/64
CPC分类号： G11B5/855 , G11B5/746 , G11B5/82 , G11B2005/0002
摘要： A magnetic recording disc is provided according to the present invention for magnetic recording. The magnetic recording disc includes a disc substrate having a locking pattern etched therein. Chemically synthesized iron-platinum particles are provided in the locking pattern and completely fill the locking pattern. The chemically synthesized iron-platinum nanoparticles exhibit short-range order characteristics forming self organized magnetic arrays.
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公开(公告)号：US07688535B2
公开(公告)日：2010-03-30
申请号：US11850214
申请日：2007-09-05
IPC分类号： G11B20/14
CPC分类号： G11B5/59633 , G11B5/59688
摘要： A method is disclosed for determining position information of a transducer. At least a first code and a second code are chosen. The first code has different characteristics than the second code. User data written to a first sub-track is encoded with the first code and user data written to a second sub-track is encoded with the second code. The first code read from the first sub-track is obtained and the second code read from the second sub-track is obtained. Position information of the transducer is extracted from the obtained characteristics of the first code and the obtained characteristics of the second code.
摘要翻译： 公开了一种用于确定换能器的位置信息的方法。 至少选择第一代码和第二代码。 第一个代码具有与第二个代码不同的特征。 写入第一子轨道的用户数据用第一代码进行编码，并且用第二代码对写入第二子轨道的用户数据进行编码。 获得从第一子轨道读取的第一代码，并且获得从第二子轨道读取的第二代码。 从获得的第一代码的特性和获得的第二代码的特性中提取换能器的位置信息。
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公开(公告)号：US20090059412A1
公开(公告)日：2009-03-05
申请号：US11850214
申请日：2007-09-05
IPC分类号： G11B21/02
CPC分类号： G11B5/59633 , G11B5/59688
摘要： A method is disclosed for determining position information of a transducer. At least a first code and a second code are chosen. The first code has different characteristics than the second code. User data written to a first sub-track is encoded with the first code and user data written to a second sub-track is encoded with the second code. The first code read from the first sub-track is obtained and the second code read from the second sub-track is obtained. Position information of the transducer is extracted from the obtained characteristics of the first code and the obtained characteristics of the second code.
摘要翻译： 公开了一种用于确定换能器的位置信息的方法。 至少选择第一代码和第二代码。 第一个代码具有与第二个代码不同的特征。 写入第一子轨道的用户数据用第一代码进行编码，并且用第二代码对写入第二子轨道的用户数据进行编码。 获得从第一子轨道读取的第一代码，并且获得从第二子轨道读取的第二代码。 从获得的第一代码的特性和获得的第二代码的特性中提取换能器的位置信息。
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5.发明申请Ultrafast pulse field source utilizing optically induced magnetic transformation 有权利用光学诱导磁变换的超快脉冲场源公开(公告)号：US20050111137A1
公开(公告)日：2005-05-26
申请号：US10718430
申请日：2003-11-20
IPC分类号： G11B5/00 , G11B5/147 , G11B11/105 , G11C11/16
CPC分类号： G11C11/1675 , G11B11/10534 , G11B2005/0008 , G11B2005/0021 , G11B2005/0034 , G11C11/161
摘要： A magnetic field transducer includes a phase transition material exhibiting a change from an antiferromagnetic phase to a ferromagnetic phase when heated above a critical temperature, means for applying a magnetic bias field to the phase transition material, and means for heating the phase transition material above the critical temperature. Magnetic recording heads that include the transducer and magnetic disc drives that include the magnetic recording heads are also described. A method of producing a magnetic field pulse including applying a magnetic bias field to a phase transition material, and heating the phase transition material to cause the phase transition material to change from an antiferromagnetic phase to a ferromagnetic phase, is also provided. The phase transition material can comprise a rare earth-transition metal alloy, where the alloy is heated above a compensation temperature.
摘要翻译： 磁场换能器包括在加热到高于临界温度时表现出从反铁磁相到铁磁相的变化的相变材料，用于向相变材料施加磁偏置场的装置，以及用于加热相转变材料上方的相变材料的装置 临界温度。 还描述了包括换能器和包括磁记录头的磁盘驱动器的磁记录头。 还提供了一种产生磁场脉冲的方法，包括对相变材料施加磁偏置场，并加热相变材料以使相变材料从反铁磁相变为铁磁相。 相变材料可以包括稀土 - 过渡金属合金，其中合金被加热到高于补偿温度。
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公开(公告)号：US08730604B2
公开(公告)日：2014-05-20
申请号：US13173861
申请日：2011-06-30
CPC分类号： G11B5/59616 , G11B5/5965 , G11B5/746 , G11B2005/0005 , G11B2220/252
摘要： A given reference pattern is written on bit patterned media that has an initial reference pattern already disposed thereon. A write phase and frequency is detected based on the initial reference pattern and the given reference pattern is written on the bit patterned media at the detected write phase and frequency.
摘要翻译： 给定的参考图案被写在具有已经设置在其上的初始参考图案的位图案介质上。 基于初始参考图案检测写入相位和频率，并且在检测到的写入相位和频率上将给定的参考图案写入位图案化媒体。
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7.发明授权Ultrafast pulse field source utilizing optically induced magnetic transformation 有权利用光学诱导磁变换的超快脉冲场源公开(公告)号：US07271981B2
公开(公告)日：2007-09-18
申请号：US10718430
申请日：2003-11-20
IPC分类号： G11B5/127
CPC分类号： G11C11/1675 , G11B11/10534 , G11B2005/0008 , G11B2005/0021 , G11B2005/0034 , G11C11/161
摘要： A magnetic field transducer includes a phase transition material exhibiting a change from an antiferromagnetic phase to a ferromagnetic phase when heated above a critical temperature, means for applying a magnetic bias field to the phase transition material, and means for heating the phase transition material above the critical temperature. Magnetic recording heads that include the transducer and magnetic disc drives that include the magnetic recording heads are also described. A method of producing a magnetic field pulse including applying a magnetic bias field to a phase transition material, and heating the phase transition material to cause the phase transition material to change from an antiferromagnetic phase to a ferromagnetic phase, is also provided. The phase transition material can comprise a rare earth-transition metal alloy, where the alloy is heated above a compensation temperature.
摘要翻译： 磁场换能器包括在加热到高于临界温度时表现出从反铁磁相到铁磁相的变化的相变材料，用于向相变材料施加磁偏置场的装置，以及用于加热相转变材料上方的相变材料的装置 临界温度。 还描述了包括换能器和包括磁记录头的磁盘驱动器的磁记录头。 还提供了一种产生磁场脉冲的方法，包括对相变材料施加磁偏置场，并加热相变材料以使相变材料从反铁磁相变为铁磁相。 相变材料可以包括稀土 - 过渡金属合金，其中合金被加热到高于补偿温度。
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公开(公告)号：US06835464B2
公开(公告)日：2004-12-28
申请号：US10251278
申请日：2002-09-19
申请人： Thomas F. Ambrose , Timothy John Klemmer , Rene Johannes Marinus van de Veerdonk , Gregory John Parker , James K. Howard
发明人： Thomas F. Ambrose , Timothy John Klemmer , Rene Johannes Marinus van de Veerdonk , Gregory John Parker , James K. Howard
IPC分类号： H01F100
CPC分类号： B82Y25/00 , B82Y10/00 , B82Y40/00 , G01R33/093 , G11B5/3903 , H01F10/30 , H01F10/3218 , H01F10/3286 , H01F41/302 , Y10T428/1157 , Y10T428/1171 , Y10T428/12868 , Y10T428/1291 , Y10T428/32
摘要： A perpendicular exchange biased device comprises a layer of buffer material on a surface of a substrate, a layer of ferromagnetic material on a surface of the buffer layer, wherein the magnetization of the ferromagnetic layer lies in a direction perpendicular to the plane of the layer of ferromagnetic material, and a layer of antiferromagnetic material on a surface of the layer of ferromagnetic material. A method of making a perpendicular exchange biased device comprising positioning a layer of buffer material on a surface of a substrate, positioning a layer of ferromagnetic material on a surface of the layer of buffer material, wherein the magnetization of the ferromagnetic layer lies in a direction perpendicular to the plane of the layer of ferromagnetic material, and positioning a layer of antiferromagnetic material on a surface of the layer of ferromagnetic material is also included.
摘要翻译： 垂直交换偏置装置包括在衬底的表面上的缓冲材料层，缓冲层表面上的铁磁材料层，其中铁磁层的磁化位于垂直于层的平面的方向 铁磁材料，以及在铁磁材料层的表面上的一层反铁磁材料。 一种制造垂直交换偏置装置的方法，包括将缓冲材料层定位在衬底的表面上，将铁磁材料层定位在缓冲材料层的表面上，其中铁磁层的磁化位于方向 垂直于铁磁材料层的平面，并且在铁磁材料层的表面上定位一层反铁磁材料。
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9.发明授权Magnetic recording media with discrete tracks of magnetic material in a magnetically soft underlayer 失效磁性记录介质，具有磁性材料的磁性软底层离散轨迹公开(公告)号：US07394622B2
公开(公告)日：2008-07-01
申请号：US11005819
申请日：2004-12-07
申请人： Edward Charles Gage , Gary Clark Rauch , Rene Johannes Marinus van de Veerdonk , Hans Juergen Richter , Terry Wayne McDaniel , Mark H. Kryder
发明人： Edward Charles Gage , Gary Clark Rauch , Rene Johannes Marinus van de Veerdonk , Hans Juergen Richter , Terry Wayne McDaniel , Mark H. Kryder
IPC分类号： G11B5/82
摘要： A magnetic recording medium comprises a magnetically soft underlayer having a plurality of cavities in a surface thereof, and a magnetic recording material in the cavities, wherein a surface of the magnetic recording material in the cavities is substantially coplanar with the surface of the soft underlayer. A recording system that includes the recording medium is also included.
摘要翻译： 磁记录介质包括在其表面具有多个空腔的磁软底层和空腔中的磁记录材料，其中空腔中的磁记录材料的表面与软底层的表面基本上共面。 还包括包括记录介质的记录系统。
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公开(公告)号：US20130003215A1
公开(公告)日：2013-01-03
申请号：US13173861
申请日：2011-06-30
CPC分类号： G11B5/59616 , G11B5/5965 , G11B5/746 , G11B2005/0005 , G11B2220/252
摘要： A given reference pattern is written on bit patterned media that has an initial reference pattern already disposed thereon. A write phase and frequency is detected based on the initial reference pattern and the given reference pattern is written on the bit patterned media at the detected write phase and frequency.
摘要翻译： 给定的参考图案被写在具有已经设置在其上的初始参考图案的位图案介质上。 基于初始参考图案检测写入相位和频率，并且在检测到的写入相位和频率上将给定的参考图案写入位图案化媒体。
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