公开(公告)号：US08264788B2

公开(公告)日：2012-09-11

申请号：US12390592

申请日：2009-02-23

申请人： Kaizhong Gao ,  Michael Allen Seigler ,  Xuhui Jin ,  Ganping Ju ,  Bin Lu

发明人： Kaizhong Gao ,  Michael Allen Seigler ,  Xuhui Jin ,  Ganping Ju ,  Bin Lu

IPC分类号： G11B5/02

CPC分类号： G11B5/314 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/855 ,  G11B2005/001 ,  G11B2005/0021

摘要： An apparatus includes a recording media including a substrate, a plurality of tracks of magnetic material on the substrate, and a non-magnetic material between the tracks; a recording head having an air bearing surface positioned adjacent to the recording media, and including a magnetic pole, an optical transducer, and a near-field transducer, wherein the near-field transducer directs electromagnetic radiation onto tracks to heat portions of the tracks and a magnetic field from the magnetic pole is used to create magnetic transitions in the heated portions of the tracks; and a plasmonic material positioned adjacent to the magnetic material to increase coupling between the electromagnetic radiation and the magnetic material.

摘要翻译： 一种设备包括：记录介质，包括基板，多个基板上的磁性材料轨迹，以及轨道之间的非磁性材料; 记录头，其具有邻近记录介质定位的空气轴承表面，并且包括磁极，光学换能器和近场换能器，其中近场换能器将电磁辐射引导到轨道上以加热轨道的部分， 来自磁极的磁场用于在轨道的加热部分中产生磁转变; 以及与磁性材料相邻定位的等离子体元件，以增加电磁辐射与磁性材料之间的耦合。

公开(公告)号：US20100200124A1

公开(公告)日：2010-08-12

申请号：US12369844

申请日：2009-02-12

申请人： Jiaoming Qiu ,  Yonghua Chen ,  Ganping Ju

发明人： Jiaoming Qiu ,  Yonghua Chen ,  Ganping Ju

IPC分类号： C21D1/26

CPC分类号： B32B15/018 ,  C21D1/26 ,  G11B5/653 ,  G11B5/84

摘要： A method includes: constructing a multilayer structure including a first layer of Pt, a first layer of A1 phase FePt on the first layer of Pt, and a second layer of Pt on the layer of FePt, and annealing the multilayer structure to convert the A1 phase FePt to L10 phase FePt.

摘要翻译： 一种方法包括：构造包括Pt的第一层，Pt的第一层上的第一Al层FePt层和FePt层上的第二层Pt的多层结构，并退火该多层结构以转化A1 相FePt至L10相FePt。

公开(公告)号：US07595959B2

公开(公告)日：2009-09-29

申请号：US11170035

申请日：2005-06-29

申请人： Mark William Covington ,  Ganping Ju ,  Werner Scholz ,  Michael Kevin Minor

发明人： Mark William Covington ,  Ganping Ju ,  Werner Scholz ,  Michael Kevin Minor

IPC分类号： G11B5/127

CPC分类号： G11B5/667 ,  G11B5/1278 ,  G11B5/581 ,  G11B5/6005 ,  Y10T428/115 ,  Y10T428/1186

摘要： A magnetic recording system is disclosed in which the magnetization dynamics of the write head and recording medium are highly damped. The system may comprise a perpendicular recording head having a write pole, and a recording medium including a hard magnetic recording layer and a soft magnetic underlayer (SUL). The increased magnetic damping in the write pole and SUL suppresses precessional motion of the respective magnetizations, leading to a reduction in transition jitter caused by spurious head field fluctuations. The damping may be increased by providing films or multilayer structures that are doped with rare earth or transition metal elements. Exchange coupled laminates of doped and undoped layers may optimize both the effective damping and write field in the recording system.

摘要翻译： 公开了一种磁记录系统，其中写头和记录介质的磁化动力学被高度阻尼。 该系统可以包括具有写入极的垂直记录头和包括硬磁记录层和软磁性底层（SUL）的记录介质。 写入磁极和SUL中的增加的磁阻抑制了相应磁化的进动运动，导致由杂散磁头场波动引起的转换抖动的减小。 可以通过提供掺杂有稀土或过渡金属元素的膜或多层结构来增加阻尼。 掺杂和未掺杂层的交换耦合层压板可以优化记录系统中的有效阻尼和写入场。

公开(公告)号：US20070172705A1

公开(公告)日：2007-07-26

申请号：US11336799

申请日：2006-01-20

申请人： Dieter Weller ,  Edward Gage ,  Ganping Ju ,  Bin Lu

发明人： Dieter Weller ,  Edward Gage ,  Ganping Ju ,  Bin Lu

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/65 ,  Y10T428/25 ,  Y10T428/2982 ,  Y10T428/32 ,  Y10T428/325

摘要： A thin film structure comprises a first layer including a first plurality of grains of magnetic material having a first intergranular exchange coupling, and a second layer positioned adjacent to the first layer and including a second plurality of grains of magnetic material having a second intergranular exchange coupling, wherein the second intergranular exchange coupling is larger than the first intergranular exchange coupling and wherein the Curie temperature of the first layer is greater than the Curie temperature of the second layer. A data storage system including the thin film structure is also provided.

摘要翻译： 薄膜结构包括第一层，其包括具有第一晶间交换耦合的第一多个磁性材料颗粒和邻近第一层定位的第二层，并且包括具有第二晶间交换耦合的第二多个磁性材料颗粒 ，其中所述第二晶间交换耦合大于所述第一晶间交换耦合，并且其中所述第一层的居里温度大于所述第二层的居里温度。 还提供了包括薄膜结构的数据存储系统。

公开(公告)号：US07166997B2

公开(公告)日：2007-01-23

申请号：US10679905

申请日：2003-10-06

申请人： Ganping Ju ,  Roy W. Chantrell ,  Hong Zhou ,  Dieter K. Weller

发明人： Ganping Ju ,  Roy W. Chantrell ,  Hong Zhou ,  Dieter K. Weller

IPC分类号： G01R33/02

CPC分类号： G01R33/1207 ,  G01R33/0325

摘要： A method and apparatus for determining volume and anisotropy field distribution of thin film granular material includes the use of a magneto-optic probe, a lock-in amplifier, and a computer. The magneto-optic probe utilizes the Kerr effect in order to determine the transverse AC susceptibility of the sample. The Lock-in amplifier determines the complex parameters of the susceptibility as a function of the DC field and AC frequency. Separate distribution values of anisotropy field and grain volume can then be determined mathematically from the relationship of complex susceptibility parameters to the DC field strength.

摘要翻译： 用于确定薄膜颗粒材料的体积和各向异性场分布的方法和装置包括使用磁光探针，锁定放大器和计算机。 磁光探针利用克尔效应来确定样品的横向AC敏感性。 锁定放大器确定作为直流电场和交流频率的函数的磁化率的复杂参数。 然后可以从复合磁化率参数与直流场强度的关系数学地确定各向异性场和晶粒体积的分离值。

公开(公告)号：US20050106422A1

公开(公告)日：2005-05-19

申请号：US10717107

申请日：2003-11-19

申请人： Bin Lu ,  Dieter Weller ,  Ganping Ju ,  Jai-Young Kim

发明人： Bin Lu ,  Dieter Weller ,  Ganping Ju ,  Jai-Young Kim

IPC分类号： B05D5/12 ,  B32B5/16 ,  G11B5/64 ,  G11B5/84

CPC分类号： G11B5/65 ,  G11B5/84 ,  Y10T428/256 ,  Y10T428/257

摘要： The invention includes improving or enhancing exchange coupling within a thin film layer. The improvement or enhancement to the exchange coupling occurs between the grains that are deposited to form the thin film. The improvement or enhancement to the exchange coupling between the grains of the thin film results from annealing the thin film at an elevated temperature for a period of time. A thin film structure and/or a magnetic recording layer made in accordance with the invention are disclosed.

摘要翻译： 本发明包括改善或增强薄膜层内的交换耦合。 在沉积以形成薄膜的晶粒之间发生交换耦合的改进或增强。 对薄膜晶粒之间的交换耦合的改善或增强是由于在高温下将薄膜退火一段时间。 公开了根据本发明制成的薄膜结构和/或磁记录层。

公开(公告)号：US08722214B2

公开(公告)日：2014-05-13

申请号：US13619245

申请日：2012-09-14

申请人： Yingguo Peng ,  Ganping Ju

发明人： Yingguo Peng ,  Ganping Ju

IPC分类号： G11B5/66

CPC分类号： G11B5/656 ,  B82Y10/00 ,  G11B5/65 ,  G11B5/653 ,  G11B5/73 ,  G11B5/7315 ,  G11B5/7325 ,  G11B5/746 ,  G11B5/851 ,  H01F1/06 ,  H01F10/123 ,  H01F41/18

摘要： Magnetic layers are described that include the use of magnetic grains and non-magnetic grain boundaries with hybrid additives. Hybrid additives include the use of at least two different additives in the composition of the grain boundaries of a magnetic layer in magnetic recording media. The use of hybrid additives in the grain boundaries results in improved recording media. Methods for forming magnetic layers and magnetic recording media with the hybrid additive grain boundaries are also described.

摘要翻译： 描述了包括使用磁性颗粒和非磁性晶界与混合添加剂的磁性层。 混合添加剂包括在磁记录介质中磁性层的晶界组成中使用至少两种不同的添加剂。 在晶界中使用混合添加剂导致改进的记录介质。 还描述了用于形成具有混合添加剂晶界的磁性层和磁记录介质的方法。

公开(公告)号：US08507114B2

公开(公告)日：2013-08-13

申请号：US13174387

申请日：2011-06-30

申请人： Yingguo Peng ,  Jan-Ulrich Thiele ,  Ganping Ju ,  Thomas Patrick Nolan ,  Yinfeng Ding ,  Alexander Qihong Wu

发明人： Yingguo Peng ,  Jan-Ulrich Thiele ,  Ganping Ju ,  Thomas Patrick Nolan ,  Yinfeng Ding ,  Alexander Qihong Wu

IPC分类号： G11B5/66

CPC分类号： G11B5/73 ,  G11B5/66

摘要： A magnetic stack includes multiple granular layers, at least one of the multiple granular layers is a magnetic layer that includes exchange coupled magnetic grains separated by a segregant having Ms greater than 100 emu/cc. Each of the multiple granular layers have anisotropic thermal conductivity.

摘要翻译： 磁性堆叠包括多个颗粒层，多个颗粒层中的至少一个是包含由具有大于100emu / cc的Ms的分离器分离的交换耦合的磁性颗粒的磁性层。 多个颗粒层中的每个具有各向异性热导率。

公开(公告)号：US08241766B2

公开(公告)日：2012-08-14

申请号：US11835476

申请日：2007-08-08

申请人： Bin Lu ,  Ganping Ju

发明人： Bin Lu ,  Ganping Ju

IPC分类号： G11B5/66

CPC分类号： G11B5/314 ,  G11B5/1278 ,  G11B2005/001 ,  G11B2005/0021

摘要： An apparatus includes a plurality of bilayer structures positioned adjacent to each other, each of the bilayer structures including a first layer of magnetic material having a first Curie temperature and a second layer of magnetic material positioned adjacent to the first layer, wherein the second layer has a second Curie temperature that is lower than the first Curie temperature, and magnetic grains of the first layer are unstable when the second layer of magnetic material is heated above the second Curie temperature. The recording temperature is reduced due to the smaller switching volume achieved by using vertically decoupled laminations at elevated temperatures.

摘要翻译： 一种装置包括彼此相邻定位的多个双层结构，每个双层结构包括具有第一居里温度的第一层磁性材料和邻近第一层定位的第二层磁性材料，其中第二层具有 第二居里温度低于第一居里温度时，当第二层磁性材料被加热到高于第二居里温度时，第一层的磁性颗粒是不稳定的。 由于在升高的温度下使用垂直去耦的叠片来实现较小的开关体积，所以记录温度降低。

公开(公告)号：US20120082866A1

公开(公告)日：2012-04-05

申请号：US12895564

申请日：2010-09-30

申请人： Shuaigang Xiao ,  Thomas Young Chang ,  Yingguo Peng ,  David Kuo ,  Kaizhong Gao ,  Tom Nolan ,  Ganping Ju

发明人： Shuaigang Xiao ,  Thomas Young Chang ,  Yingguo Peng ,  David Kuo ,  Kaizhong Gao ,  Tom Nolan ,  Ganping Ju

IPC分类号： G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/84 ,  G11B5/855

摘要： A perpendicular magnetic media includes a substrate, a patterned template, a seed layer and a magnetic layer. The patterned template is formed on the substrate and includes a plurality of growth sites that are evenly spaced apart from each other. The seed layer is formed over the patterned template and the exposed areas of the substrate. Magnetic material is sputter deposited onto the seed layer with one grain of the magnetic material nucleated over each of the growth sites. The grain size distribution of the magnetic material is reduced by controlling the locations of the growth sites which optimizes the performance of the perpendicular magnetic media.

摘要翻译： 垂直磁性介质包括衬底，图案化模板，种子层和磁性层。 图案化模板形成在基板上并且包括彼此均匀间隔开的多个生长位点。 种子层形成在图案化模板和基板的暴露区域上。 将磁性材料溅射沉积到种子层上，其中一颗磁性材料成核在每个生长位点上。 通过控制优化垂直磁性介质性能的生长部位的位置来减小磁性材料的粒度分布。