公开(公告)号：US09805754B2

公开(公告)日：2017-10-31

申请号：US14901884

申请日：2014-07-17

申请人： SONY CORPORATION

发明人： Katsunori Maeshima

IPC分类号： G11B5/706 ,  G11B5/64 ,  G11B5/714 ,  G11B5/84

CPC分类号： G11B5/64 ,  G11B5/70678 ,  G11B5/714 ,  G11B5/84

摘要： A magnetic recording medium includes: a substrate; and a magnetic layer including a ferrimagnetic particle powder. A product (V×SFD) of a particle volume V and a holding force distribution SFD of the ferrimagnetic particle is equal to or less than 2500 nm3.

公开(公告)号：US09779770B1

公开(公告)日：2017-10-03

申请号：US15174520

申请日：2016-06-06

申请人： Seagate Technology LLC

发明人： Thomas P. Nolan ,  Bruce Buch ,  Philip L. Steiner

IPC分类号： G11B5/74 ,  G11B5/64 ,  G11B20/14

CPC分类号： G11B5/64

摘要： A three-dimensional magnetic recording media can consist of a single recording layer configured with three or more separate magnetization levels. A first magnetization level can be written to a selected region of said recording layer by applying a first write field to the grains of said region to form a “spin-up” magnetization in the grains of said region. A second magnetization level can be written by applying a second opposite write field to selected grains of said region to form a “spin-down” magnetization. At least a third intermediate magnetization level can be written by applying a weaker or alternating write field to grains of said region to form an intermediate magnetization comprising a mixture of spin-up and spin-down grains. By such method, said region may comprise a data bit capable of storing 3 or more units of information corresponding to the number of separate magnetization levels employed.

公开(公告)号：US09280997B2

公开(公告)日：2016-03-08

申请号：US14639036

申请日：2015-03-04

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Akinaga Natsui ,  Takeshi Morita

IPC分类号： G11B11/00 ,  G11B5/78 ,  G11B5/64 ,  G11B5/738 ,  G11B11/105 ,  G11B11/14 ,  G11B5/584

CPC分类号： G11B5/78 ,  G11B5/584 ,  G11B5/64 ,  G11B5/738 ,  G11B11/105 ,  G11B11/14

摘要： Provided is a tape recording medium including: a base layer having a first surface and a second surface; a first recording layer disposed over the first surface of the base layer and capable of optically recording first data; an imprinted layer disposed between the base layer and the first recording layer; and a second recording layer. The second recording layer is disposed over the second surface of the base layer, contains a magnetic material, and has recorded second data different from the first data.

摘要翻译： 提供一种带式记录介质，包括：具有第一表面和第二表面的基层; 第一记录层，设置在所述基底层的所述第一表面上并能够光学记录第一数据; 设置在所述基底层和所述第一记录层之间的印刷层; 和第二记录层。 第二记录层设置在基层的第二表面上，包含磁性材料，并记录与第一数据不同的第二数据。

公开(公告)号：US09001630B1

公开(公告)日：2015-04-07

申请号：US14260512

申请日：2014-04-24

申请人： Western Digital Technologies, Inc.

发明人： Gerardo A. Bertero ,  Michael Alex ,  Christopher B. Wolf ,  Eric J. Champion

IPC分类号： G11B11/00 ,  G11B5/64 ,  G11B5/00 ,  G11B20/10

CPC分类号： G11B5/64 ,  G11B5/00 ,  G11B5/66 ,  G11B5/82 ,  G11B20/10481 ,  G11B2005/0021

摘要： A perpendicular magnetic recording (PMR) disk used in energy assisted magnetic recording drives is described. The PMR disk includes a substrate, a magnetic recording layer disposed above the substrate, an exchange coupling layer disposed above the magnetic recording layer, and a capping layer disposed above the exchange coupling layer. The capping layer has a Curie temperature greater than the Curie temperature of the magnetic recording layer.

摘要翻译： 描述了用于能量辅助磁记录驱动器的垂直磁记录（PMR）盘。 PMR盘包括衬底，设置在衬底上的磁记录层，设置在磁记录层上方的交换耦合层和设置在交换耦合层上方的覆盖层。 封盖层的居里温度大于磁记录层的居里温度。

公开(公告)号：US20140346039A1

公开(公告)日：2014-11-27

申请号：US14372236

申请日：2013-05-22

申请人： JX Nippon Mining & Metals Corporation

发明人： Shini-ichi Ogino

IPC分类号： C23C14/16 ,  G11B5/851 ,  G11B5/65 ,  C23C14/34

CPC分类号： C23C14/165 ,  C22C5/04 ,  C22C30/00 ,  C22C32/0084 ,  C22C33/02 ,  C22C33/0278 ,  C22C38/00 ,  C22C38/002 ,  C22C2202/02 ,  C23C14/3414 ,  G11B5/64 ,  G11B5/653 ,  G11B5/851 ,  H01F41/183 ,  H01J37/3426 ,  H01J37/3429

摘要： Provided is a sputtering target for a magnetic recording film. The sputtering target has a peak intensity ratio (IG/ID) of a G-band to a D-band of 5.0 or more in Raman scattering spectrometry. It is an object of the present invention to produce a magnetic thin film having a granular structure without using a high cost co-sputtering apparatus and to provide a sputtering target, in particular, an Fe—Pt-based sputtering target for a magnetic recording film, where carbon particles are dispersed in the target. Since carbon is a material which is not susceptible to being sintered and is susceptible to form aggregates, a conventional carbon-containing sputtering target has the problem that detachment of carbon lumps occurs during sputtering to result in generation of a large number of particles on the film. The present invention also addresses the problem of providing a high density sputtering target that can overcome the disadvantages.

摘要翻译： 提供了一种用于磁记录膜的溅射靶。 溅射靶在拉曼散射光谱中具有G带与D带的峰强度比（IG / ID）为5.0以上。 本发明的目的是在不使用高成本的共溅射装置的情况下制造具有颗粒结构的磁性薄膜，并且提供溅射靶，特别是用于磁记录膜的Fe-Pt系溅射靶 其中碳颗粒分散在靶中。 由于碳是不易于烧结并容易形成聚集体的材料，因此常规的含碳溅射靶具有在溅射期间发生碳块分离从而在膜上产生大量颗粒的问题 。 本发明还涉及提供能够克服这些缺点的高密度溅射靶的问题。

公开(公告)号：US08848307B2

公开(公告)日：2014-09-30

申请号：US13364354

申请日：2012-02-02

申请人： Michael Allen Seigler ,  William Challener

发明人： Michael Allen Seigler ,  William Challener

IPC分类号： G11B5/02

CPC分类号： G11B5/64 ,  G11B5/74 ,  G11B2005/0021

摘要： An apparatus includes a magnetic recording layer and a thermally active material adjacent to and/or embedded in the magnetic recording layer, wherein the thermally active material has a thermal property that changes when the temperature of the thermally active material changes, or undergoes a phase transition in a predetermined temperature range, to reduce a peak temperature or increase a thermal gradient of a heated portion of the magnetic recording layer.

摘要翻译： 一种装置包括与磁记录层相邻和/或嵌入的磁记录层和热活性材料，其中该热活性材料具有当热活性材料的温度改变时发生变化或发生相变的热性质 在预定的温度范围内，降低磁记录层的加热部分的峰值温度或增加热梯度。

公开(公告)号：US08709532B2

公开(公告)日：2014-04-29

申请号：US12758195

申请日：2010-04-12

申请人： Masafumi Ishiyama

发明人： Masafumi Ishiyama

IPC分类号： G11B5/84

CPC分类号： G11B5/8408 ,  G11B5/64 ,  G11B5/72 ,  Y10T29/49702

摘要： In a magnetic disk having a magnetic layer, a protection layer, and a lubrication layer formed on a substrate in this order, a surface free energy γS of a surface of the magnetic disk derived by an extended Fowkes equation is greater than 0 and no greater than 24 mN/m. γSd (dispersion force component of surface free energy) forming the surface free energy γS is greater than 0 and no greater than 17 mN/m, γSp (dipole component of surface free energy) forming the surface free energy γS is greater than 0 and no greater than 1 mN/m, and γSh (hydrogen bonding force component of surface free energy) forming the surface free energy γS is greater than 0 and no greater than 6 mN/m.

摘要翻译： 在依次形成在基板上的具有磁性层，保护层和润滑层的磁盘中，通过扩展Fowkes方程导出的磁盘表面的表面自由能γS大于0而不大于 超过24 mN / m。 形成表面自由能γS的γSd（表面自由能的分散力分量）大于0且不大于17mN / m，形成表面自由能γS的γSp（表面自由能的偶极子成分）大于0，并且不 大于1mN / m，形成表面自由能γS的γSh（表面自由能的氢键力分量）大于0且不大于6mN / m。

公开(公告)号：US20130293983A1

公开(公告)日：2013-11-07

申请号：US13798349

申请日：2013-03-13

申请人： HITACHI, LTD.

发明人： Yoshiyuki HIRAYAMA ,  Masukazu IGARASHI ,  Katsuro WATANABE

IPC分类号： G11B5/68 ,  G11B5/718

CPC分类号： G11B5/68 ,  G11B5/02 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/718 ,  G11B5/746 ,  G11B2005/0024

摘要： Provided is a magnetic recording medium achieving both of reduction in switching field distribution and reduction in switching field intensity by high-frequency magnetic field, thus enabling high-density recording. Magnetic grains of the magnetic recording medium are made up of a recording layer and a resonance layer. The resonance layer is disposed closer to a protective layer 5 than the recording layer, and a magnetic material of the recording layer has anisotropy field 1.2 times or more anisotropy field of a magnetic material of the resonance layer. The magnetic material of the recording layer has saturation magnetization substantially equal to saturation magnetization of the magnetic material of the resonance layer. At the entire resonance layer and a part of the recording layer, the magnetic grains are separated from surrounding magnetic grains by a nonmagnetic material, and at a part of the recording layer, the magnetic grains are coupled with surrounding magnetic grains.

摘要翻译： 提供了一种磁记录介质，其通过高频磁场实现开关场分布的减小和开关场强的降低，从而实现高密度记录。 磁记录介质的磁性颗粒由记录层和谐振层组成。 谐振层设置成比记录层更靠近保护层5，并且记录层的磁性材料具有共振层的磁性材料的各向异性场的1.2倍以上的各向异性场。 记录层的磁性材料具有与谐振层的磁性材料的饱和磁化强度基本相等的饱和磁化强度。 在整个共振层和记录层的一部分，磁性颗粒通过非磁性材料与周围的磁性颗粒分离，并且在记录层的一部分，磁性颗粒与周围的磁性颗粒结合。

公开(公告)号：US20130266740A1

公开(公告)日：2013-10-10

申请号：US13442526

申请日：2012-04-09

申请人： Yukiko Kubota

发明人： Yukiko Kubota

IPC分类号： G11B5/84 ,  G11B5/738 ,  G11B5/72 ,  B05D3/02

CPC分类号： G11B5/84 ,  C23C14/22 ,  G11B5/64 ,  G11B5/7325 ,  G11B2005/0021

摘要： A data device may have at least a magnetic lamination with a thermal retention structure deposited on a substrate and configured to maintain a predetermined temperature for a predetermined amount of time. Such predetermined temperature and amount of time may allow for the growth of a magnetic layer with a predetermined magnetic anisotropy.

摘要翻译： 数据装置可以至少具有沉积在基板上的热保持结构的磁性层压，并且被配置为将预定温度保持预定的时间量。 这样的预定温度和时间量可以允许具有预定磁各向异性的磁性层的生长。

公开(公告)号：US08501330B2

公开(公告)日：2013-08-06

申请号：US13270715

申请日：2011-10-11

申请人： Shaoping Li ,  Kaizhong Gao ,  Lei Wang ,  Wenzhong Zhu ,  Xiaobin Wang

发明人： Shaoping Li ,  Kaizhong Gao ,  Lei Wang ,  Wenzhong Zhu ,  Xiaobin Wang

IPC分类号： G11B5/66 ,  G11B5/65

CPC分类号： G11B5/667 ,  B82Y10/00 ,  G11B5/64 ,  G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B2005/0029 ,  H01F41/0206 ,  Y10S428/90 ,  Y10T29/4902 ,  Y10T29/49032 ,  Y10T29/49067 ,  Y10T428/12458 ,  Y10T428/12465 ,  Y10T428/12931 ,  Y10T428/26 ,  Y10T428/265

摘要： A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed thereon, the layer stack including a perpendicular recording layer containing a plurality of columnar-shaped magnetic grains extending perpendicularly to the substrate surface for a length, with a first end distal the surface and a second end proximal the surface, wherein each of the magnetic grains has: (1) a gradient of perpendicular magnetic anisotropy field Hk extending along its length between the first end and second ends; and (2) predetermined local exchange coupling strengths along the length.