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    PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD OF THE SAME
    3.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD OF THE SAME 审中-公开
    全能磁记录介质及其制造方法

    公开(公告)号：US20120052330A1

    公开(公告)日：2012-03-01

    申请号：US13214270

    申请日：2011-08-22

    申请人： Ikuko TAKEKUMA ,  Kimio NAKAMURA ,  Junichi SAYAMA ,  Hiroaki NEMOTO

    发明人： Ikuko TAKEKUMA ,  Kimio NAKAMURA ,  Junichi SAYAMA ,  Hiroaki NEMOTO

    IPC分类号： G11B5/66 ,  G11B5/84

    CPC分类号： G11B5/84 ,  G11B5/65 ,  G11B5/66

    摘要： A perpendicular magnetic recording medium having sufficient perpendicular uniaxial magnetic anisotropy energy and a crystal grain size for realizing an areal recording density of one terabit or more per one square centimeter, and excellent in mass productivity, and a manufacturing method of the same are provided. On a substrate, a substrate-temperature control layer, an underlayer and a magnetic recording layer are sequentially formed. The magnetic recording layer is formed by repeating a magnetic layer stacking step N times (N≧2), which includes a first step of heating the substrate in a heat process chamber, and a second step of depositing, in a deposition process chamber, the magnetic recording layer constituted of an alloy mainly composed of FePt to which at least one kind of non-magnetic material selected from a group constituted of C and an Si oxide is added.

    摘要翻译： 提供具有足够的垂直单轴磁各向异性能和晶粒尺寸的垂直磁记录介质，用于实现每平方厘米一兆比特或更大的面密度记录密度，并且具有优异的批量生产率及其制造方法。 在衬底上依次形成衬底温度控制层，底层和磁记录层。 通过重复N次（N≥2）的磁性层堆叠步骤形成磁记录层，其包括在热处理室中加热衬底的第一步骤，以及在沉积处理室中沉积第二步骤 由主要由FePt组成的合金构成的磁记录层，其中添加了选自C和Si氧化物中的至少一种非磁性材料。

    Thermally assisted recording media and system
    4.
    发明授权
    Thermally assisted recording media and system 失效
    热辅助记录媒体和系统

    公开(公告)号：US08089829B2

    公开(公告)日：2012-01-03

    申请号：US12608232

    申请日：2009-10-29

    申请人： Fumiko Akagi ,  Masukazu Igarashi ,  Hiroaki Nemoto ,  Takayuki Ichihara

    发明人： Fumiko Akagi ,  Masukazu Igarashi ,  Hiroaki Nemoto ,  Takayuki Ichihara

    IPC分类号： G11B11/00

    CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/314 ,  G11B5/65 ,  G11B5/66 ,  G11B5/743 ,  G11B2005/0021

    摘要： A thermally assisted magnetic recording medium includes a substrate and at least two, i.e., first and second magnetic recording layers. These layers are hard magnetic layers and contain magnetic grains and a non-magnetic substance magnetically segregating the magnetic grains at grain boundaries. The first magnetic recording layer has a magnetic anisotropy energy Ku1, a grain volume v1, and energy for maintaining its recording magnetization Ku1v1; the second magnetic recording layer has a magnetic anisotropy energy Ku2, a grain volume v2, and energy for maintaining its recording magnetization Ku2v2; and the ratio Ku1v1/kBT of Ku1v1 to a thermal fluctuation energy kBT, where kB represents a Boltzmann constant and T represents an absolute temperature, and the ratio Ku2v2/kBT of Ku2v2 to kBT satisfy the following conditions: Ku1v1/kBT is larger than Ku2v2/kBT at room temperature, but is smaller than Ku2v2/kBT at temperatures around the Curie temperature of the first magnetic recording layer.

    摘要翻译： 热辅助磁记录介质包括基底和至少两个，即第一和第二磁记录层。 这些层是硬磁性层，并且含有磁性颗粒，并且非磁性物质在晶界处磁性地分离磁性颗粒。 第一磁记录层具有磁各向异性能Ku1，晶粒体积v1和用于保持其记录磁化强度Ku1v1的能量; 第二磁记录层具有磁各向异性能Ku2，晶粒体积v2和用于保持其记录磁化Ku2v2的能量; Ku1v1 / kBT的Ku1v1 / kBT与热波动能kBT的比值，其中kB表示玻耳兹曼常数，T表示绝对温度，Ku2v2与kBT的Ku2v2 / kBT的比值满足以下条件：Ku1v1 / kBT大于Ku2v2 / kBT，但在第一磁记录层的居里温度附近的温度下小于Ku2v2 / kBT。

    MAGNETIC RECORDING MEDIUM
    5.
    发明申请
    MAGNETIC RECORDING MEDIUM 审中-公开
    磁记录介质

    公开(公告)号：US20110020669A1

    公开(公告)日：2011-01-27

    申请号：US12840374

    申请日：2010-07-21

    申请人： Junichi SAYAMA ,  Hiroaki Nemoto ,  Hiroshi Ide ,  Hiroyasu Kataoka ,  Nobuyukl Takahashi ,  Takehito Shimatsu ,  Osamu Kitakami ,  Satoshi Okamoto ,  Hajime Aoi

    发明人： Junichi SAYAMA ,  Hiroaki Nemoto ,  Hiroshi Ide ,  Hiroyasu Kataoka ,  Nobuyukl Takahashi ,  Takehito Shimatsu ,  Osamu Kitakami ,  Satoshi Okamoto ,  Hajime Aoi

    IPC分类号： G11B5/706 ,  G11B5/62 ,  G11B5/73

    CPC分类号： G11B5/656 ,  G11B5/65 ,  G11B5/7315 ,  G11B5/7325

    摘要： A magnetic recording medium having excellent stability of recorded magnetic signals and capable of recording magnetic signals by a thermally assisted magnetic recording system in which a magnetic recording layer of the magnetic recording medium contains ferromagnetic crystal grains of a Co—Ni—Pt alloy with a Pt content of 44 at % or more and 55 at % or less and with an atom content ratio: Ni/(Co+Ni) of 0.64 or more and 0.8 or less. The magnetic recording medium has extremely excellent stability of recorded magnetic signals since the Co—Ni—Pt alloy constituting the magnetic recording layer has an extremely high anisotropy field at a normal temperature. Further, the magnetic recording medium can perform signal recording based on the thermally assisted magnetic recording system since the Co—Ni—Pt alloy constituting the magnetic recording layer has a Curie point within an appropriate temperature range.

    摘要翻译： 一种磁记录介质，其具有良好的记录磁信号的稳定性并且能够通过热辅助磁记录系统记录磁信号，其中磁记录介质的磁记录层包含Co-Ni-Pt合金的铁磁晶粒与Pt 含量为44原子％以上且55原子％以下，原子含量比：Ni /（Co + Ni）为0.64以上且0.8以下。 由于构成磁记录层的Co-Ni-Pt合金在常温下具有极高的各向异性场，所以磁记录介质具有非常优异的记录磁信号的稳定性。 此外，由于构成磁记录层的Co-Ni-Pt合金在适当的温度范围内具有居里点，所以磁记录介质可以基于热辅助磁记录系统执行信号记录。

    Perpendicular magnetic recording medium and magnetic storage apparatus using the same
    6.
    发明申请
    Perpendicular magnetic recording medium and magnetic storage apparatus using the same 审中-公开
    垂直磁记录介质及使用其的磁存储装置

    公开(公告)号：US20090116137A1

    公开(公告)日：2009-05-07

    申请号：US12288598

    申请日：2008-10-21

    申请人： Ikuko Takekuma ,  Hiroaki Nemoto ,  Hiroyuki Nakagawa

    发明人： Ikuko Takekuma ,  Hiroaki Nemoto ,  Hiroyuki Nakagawa

    IPC分类号： G11B21/02 ,  G11B5/66

    CPC分类号： G11B5/66 ,  G11B5/65 ,  G11B5/7379

    摘要： Embodiments of the present invention provide a perpendicular magnetic recoding medium capable of decreasing exchange coupling between crystal grains while suppressing increase in the crystal grain size of the magnetic recording layer. According to one embodiment, a perpendicular magnetic recoding medium is formed by stacking a seed layer, an intermediate layer, a magnetic recording layer, and a protecting layer all above a substrate. The magnetic recording layer has a granular structure constituted of a plurality of columnar grains comprising a CoCrPt alloy and a grain boundary containing an oxide. The seed layer is formed by stacking a first seed layer, a second seed layer, and a third seed layer in which the first seed layer comprises Ti or Ti alloy having a hexagonal close-packed structure, the second seed layer comprises Cu, Ag, or Al having a face-centered cubic structure or an alloy containing at least one element selected therefrom, and the third seed layer comprises an Ni alloy having a face-centered cubic structure.

    摘要翻译： 本发明的实施例提供一种垂直磁记录介质，其能够减少晶粒之间的交换耦合，同时抑制磁记录层的晶粒尺寸的增加。 根据一个实施例，垂直磁记录介质是通过在基底上层叠种子层，中间层，磁记录层和保护层而形成的。 磁记录层具有由包括CoCrPt合金和含有氧化物的晶界的多个柱状晶粒构成的粒状结构。 种子层通过层叠第一种子层，第二种子层和第三种子层而形成，其中第一种子层包含具有六方密堆积结构的Ti或Ti合金，第二籽晶层包含Cu，Ag， 或具有面心立方结构的Al或含有选自其中的至少一种元素的合金，并且所述第三晶种层包括具有面心立方结构的Ni合金。

    Perpendicular magnetic recording media
    7.
    发明授权
    Perpendicular magnetic recording media 失效
    垂直磁记录介质

    公开(公告)号：US07510789B2

    公开(公告)日：2009-03-31

    申请号：US11148164

    申请日：2005-06-09

    申请人： Yoshiyuki Hirayama ,  Hiroyuki Nakagawa ,  Hiroaki Nemoto ,  Ichiro Tamai ,  Ikuko Takekuma

    发明人： Yoshiyuki Hirayama ,  Hiroyuki Nakagawa ,  Hiroaki Nemoto ,  Ichiro Tamai ,  Ikuko Takekuma

    IPC分类号： G11B5/66

    CPC分类号： B82Y10/00 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/743 ,  Y10T428/24802

    摘要： A perpendicular magnetic recording medium includes an intermediate film formed of a plurality of layers between a soft magnetic film and a perpendicular magnetization film. The intermediate film includes at least two layers, i.e., an oxygen-containing layer, or a nonmetallic element-containing layer containing nitrogen, silicon or carbon, and a metallic layer formed on a surface side of the oxygen-containing layer or the nonmetallic element-containing layer. The metallic layer includes a plurality of isolated island-shaped structures. Crystal grains of the perpendicular magnetization film are formed so as to correspond to the isolated island-shaped structures. As a result, a high recording density is obtained.

    摘要翻译： 垂直磁记录介质包括由软磁膜和垂直磁化膜之间的多层形成的中间膜。 中间膜包括至少两层，即含氧层或含有氮，硅或碳的非金属元素层，以及在含氧层或非金属元素的表面侧上形成的金属层 包含层。 金属层包括多个孤立的岛状结构。 垂直磁化膜的晶粒形成为对应于孤立的岛状结构。 结果，获得高记录密度。

    Perpendicular magnetic recording medium, method of evaluating magnetic properties of the same
    8.
    发明申请
    Perpendicular magnetic recording medium, method of evaluating magnetic properties of the same 失效
    垂直磁记录介质，磁性能评价方法

    公开(公告)号：US20070217048A1

    公开(公告)日：2007-09-20

    申请号：US11715132

    申请日：2007-03-06

    申请人： Hiroaki Nemoto ,  Ikuko Takekuma ,  Yuzuru Hosoe

    发明人： Hiroaki Nemoto ,  Ikuko Takekuma ,  Yuzuru Hosoe

    IPC分类号： G11B5/02 ,  G11B5/82

    CPC分类号： G11B5/82 ,  G11B5/1278 ,  G11B5/65

    摘要： Embodiments in accordance with the present invention provide a perpendicular magnetic recording medium which is easy to record, offers superior thermal stability of recording magnetization, and allows high-density recording. In one embodiment, a perpendicular magnetic layer with controlled magnetic properties is used as a magnetic storage layer of a perpendicular magnetic recording medium, the magnetic properties having been controlled such that an indicator σhsw [%] of the dispersion of magnetization switching fields in the perpendicular magnetic layer and an indicator Dn [nm] of the intensity of exchange interactions, in film surface directions, in the perpendicular magnetic layer satisfy inequalities σhsw/27+Dn/90 20. The indicators can be measured using a magnetometer.

    摘要翻译： 根据本发明的实施例提供了易于记录的垂直磁记录介质，提供了优异的记录磁化的热稳定性，并允许高密度记录。 在一个实施例中，使用具有受控磁特性的垂直磁性层作为垂直磁记录介质的磁存储层，其磁特性已经被控制，使得该磁性性质的指示符σ< 垂直磁性层中的磁化开关场的分散和膜的表面方向上的交换相互作用强度的指示器D N n [nm]满足不等式sigmah < / SUB + / 27 + D / 90 <1和D 20。 指标可以用磁力计测量。

    Granular recording medium for perpendicular recording and recording apparatus
    9.
    发明申请
    Granular recording medium for perpendicular recording and recording apparatus 审中-公开
    用于垂直记录和记录设备的颗粒记录介质

    公开(公告)号：US20070026260A1

    公开(公告)日：2007-02-01

    申请号：US11494154

    申请日：2006-07-26

    申请人： Hiroaki Nemoto ,  Yuzuru Hosoe

    发明人： Hiroaki Nemoto ,  Yuzuru Hosoe

    IPC分类号： G11B5/66

    CPC分类号： G11B5/7325 ,  G11B5/66

    摘要： A double-layer perpendicular magnetic recording medium suitable for high density recording is obtained. In one embodiment, a granular recording medium is formed on a undercoating layer, in which a first metal composed of Pt, Pd, or an alloy thereof and a second metal composed of Cr or V are included and their composition is 15%

    摘要翻译： 获得适用于高密度记录的双层垂直磁记录介质。 在一个实施方案中，颗粒记录介质形成在底涂层上，其中包括由Pt，Pd或其合金组成的第一金属和由Cr或V组成的第二金属，并且它们的组成为15％