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1.发明授权公开(公告)号：US07457064B2
公开(公告)日：2008-11-25
申请号：US11715132
申请日：2007-03-06
Applicant: Hiroaki Nemoto , Ikuko Takekuma , Yuzuru Hosoe
Inventor： Hiroaki Nemoto , Ikuko Takekuma , Yuzuru Hosoe
IPC: G11B5/667
CPC classification number: G11B5/82 , G11B5/1278 , G11B5/65
Abstract: 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.
Abstract translation: 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，使得该磁性能的指标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。
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2.发明申请公开(公告)号：US20070217048A1
公开(公告)日：2007-09-20
申请号：US11715132
申请日：2007-03-06
Applicant: Hiroaki Nemoto , Ikuko Takekuma , Yuzuru Hosoe
Inventor： Hiroaki Nemoto , Ikuko Takekuma , Yuzuru Hosoe
CPC classification number: G11B5/82 , G11B5/1278 , G11B5/65
Abstract: 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.
Abstract translation: 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。
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3.发明授权Perpendicular magnetic recording media and magnetic storage apparatus using the same 有权垂直磁记录介质及使用其的磁存储装置公开(公告)号：US07368185B2
公开(公告)日：2008-05-06
申请号：US10977552
申请日：2004-10-29
Applicant: Yoshiyuki Hirayama , Yuzuru Hosoe , Hiroyuki Nakagawa , Ikuko Takekuma
Inventor： Yoshiyuki Hirayama , Yuzuru Hosoe , Hiroyuki Nakagawa , Ikuko Takekuma
CPC classification number: G11B5/7325 , G11B5/65 , G11B5/656
Abstract: Embodiments of the invention provide a perpendicular magnetic recording medium that not only attains the magnetic isolation of crystal grains in a magnetic recording layer from one another in a region of the medium in which the thickness of an intermediate layer is equal to or smaller than about 20 nm but also exhibits excellent crystallographic texture and that exhibits small medium noise, excellent thermal stability, and high write-ability. In one embodiment, a perpendicular magnetic recording medium has at least a soft-magnetic underlayer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a magnetic recording layer successively formed on a substrate. The magnetic recording layer is composed of ferromagnetic crystal grains and oxides or nitrides, the third intermediate layer is composed of Ru or an Ru alloy, the second intermediate layer is composed of a metal or an alloy having the face-centered cubic lattice structure, and the first intermediate layer is composed of a metal or an alloy having the hexagonal close-packed structure.
Abstract translation: 本发明的实施例提供了一种垂直磁记录介质，其不仅在中间层的厚度等于或小于约20的介质的区域中彼此之间实现磁记录层中的晶粒的磁隔离 nm，但也具有优异的晶体学结构，表现出中等的中等噪声，优异的热稳定性和高的写入能力。 在一个实施例中，垂直磁记录介质至少具有在基板上依次形成的软磁性底层，第一中间层，第二中间层，第三中间层和磁记录层。 磁记录层由铁磁性晶粒和氧化物或氮化物构成，第三中间层由Ru或Ru合金构成，第二中间层由具有面心立方晶格结构的金属或合金构成， 第一中间层由具有六方密堆积结构的金属或合金构成。
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4.发明申请Perpendicular magnetic recording media and magnetic storage apparatus using the same 有权垂直磁记录介质及使用其的磁存储装置公开(公告)号：US20050142388A1
公开(公告)日：2005-06-30
申请号：US10977552
申请日：2004-10-29
Applicant: Yoshiyuki Hirayama , Yuzuru Hosoe , Hiroyuki Nakagawa , Ikuko Takekuma
Inventor： Yoshiyuki Hirayama , Yuzuru Hosoe , Hiroyuki Nakagawa , Ikuko Takekuma
CPC classification number: G11B5/7325 , G11B5/65 , G11B5/656
Abstract: Embodiments of the invention provide a perpendicular magnetic recording medium that not only attains the magnetic isolation of crystal grains in a magnetic recording layer from one another in a region of the medium in which the thickness of an intermediate layer is equal to or smaller than about 20 nm but also exhibits excellent crystallographic texture and that exhibits small medium noise, excellent thermal stability, and high write-ability. In one embodiment, a perpendicular magnetic recording medium has at least a soft-magnetic underlayer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a magnetic recording layer successively formed on a substrate. The magnetic recording layer is composed of ferromagnetic crystal grains and oxides or nitrides, the third intermediate layer is composed of Ru or an Ru alloy, the second intermediate layer is composed of a metal or an alloy having the face-centered cubic lattice structure, and the first intermediate layer is composed of a metal or an alloy having the hexagonal close-packed structure.
Abstract translation: 本发明的实施例提供了一种垂直磁记录介质，其不仅在中间层的厚度等于或小于约20的介质的区域中彼此之间实现磁记录层中的晶粒的磁隔离 nm，但也具有优异的晶体学结构，表现出中等的中等噪声，优异的热稳定性和高的写入能力。 在一个实施例中，垂直磁记录介质至少具有在基板上依次形成的软磁性底层，第一中间层，第二中间层，第三中间层和磁记录层。 磁记录层由铁磁性晶粒和氧化物或氮化物构成，第三中间层由Ru或Ru合金构成，第二中间层由具有面心立方晶格结构的金属或合金构成， 第一中间层由具有六方密堆积结构的金属或合金构成。
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公开(公告)号：US07651795B2
公开(公告)日：2010-01-26
申请号：US11227675
申请日：2005-09-14
Applicant: Ichiro Tamai , Ikuko Takekuma , Yoshiyuki Hirayama , Yuzuru Hosoe , Yoshinori Honda
Inventor： Ichiro Tamai , Ikuko Takekuma , Yoshiyuki Hirayama , Yuzuru Hosoe , Yoshinori Honda
IPC: G11B5/65
CPC classification number: G11B5/7325 , G11B5/65 , G11B5/656
Abstract: Embodiments of the embodiment are directed to reducing the inter-granular exchange coupling of an oxide granular medium and obtaining a high media S/N value, resulting in an areal recording density greater than 23 gigabits per square centimeter or more being achieved. In one embodiment, a magnetic recording medium comprises a structure laminating a soft-magnetic underlayer, a lower intermediate layer including Ru, an upper intermediate layer consisting of Ru crystal grains and oxide crystal grain boundaries, a magnetic recording layer consisting of crystal grains and oxide crystal grain boundaries, in order, on a substrate, growing crystal grains of the magnetic recording layer epitaxially on the Ru crystal grains of the upper intermediate layer, and growing the crystal grain boundaries of the magnetic recording layer on the crystal grain boundaries of the upper intermediate layer.
Abstract translation: 实施例的实施例涉及减少氧化物颗粒介质的颗粒间交换耦合并获得高介质S / N值，导致实现大于23千兆比特/平方厘米或更大的面积记录密度。 在一个实施例中，磁记录介质包括层压软磁性底层，包含Ru的下中间层，由Ru晶粒和氧化物晶界组成的上中间层的结构，由晶粒和氧化物组成的磁记录层 晶粒边界依次在衬底上，外延地在上层中间层的Ru晶粒上生长磁记录层的晶粒，并且使上述记录层的晶界上的磁记录层的晶界生长 中间层。
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Patent Agency Ranking
公开(公告)号：US20060088734A1
公开(公告)日：2006-04-27
申请号：US11243012
申请日：2005-10-03
Applicant: Reiko Arai , Yoshiyuki Hirayama , Yuzuru Hosoe , Tomio Iwasaki , Yoko Ogawa , Ikuko Takekuma
Inventor： Reiko Arai , Yoshiyuki Hirayama , Yuzuru Hosoe , Tomio Iwasaki , Yoko Ogawa , Ikuko Takekuma
Abstract: Embodiments of the invention are directed to a medium which provides high media S/N and good corrosion resistance. According to one embodiment, in a perpendicular magnetic recording medium at least comprising a soft-magnetic underlayer, a seed layer, an intermediate layer, a magnetic recording layer and an overcoat layer which are stacked over a substrate in order, the magnetic recording layer has a granular structure which includes many columnar grains of CoCrPt alloy and a grain boundary layer containing an oxide, the seed layer is made of TaNi alloy or TaTi alloy and the intermediate layer is made of Ru or Ru alloy which contains 80 at. % Ru or more.
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7.发明授权Perpendicular magnetic recording media and magnetic storage apparatus using the same 失效垂直磁记录介质及使用其的磁存储装置公开(公告)号：US07618722B2
公开(公告)日：2009-11-17
申请号：US12079701
申请日：2008-03-27
Applicant: Yoshiyuki Hirayama , Ikuko Takekuma , Hiroyuki Nakagawa , Yuzuru Hosoe
Inventor： Yoshiyuki Hirayama , Ikuko Takekuma , Hiroyuki Nakagawa , Yuzuru Hosoe
IPC: G11B5/66
CPC classification number: G11B5/7325 , G11B5/65 , G11B5/656
Abstract: Embodiments of the invention provide a perpendicular magnetic recording medium that not only attains the magnetic isolation of crystal grains in a magnetic recording layer from one another in a region of the medium in which the thickness of an intermediate layer is equal to or smaller than about 20 nm but also exhibits excellent crystallographic texture and that exhibits small medium noise, excellent thermal stability, and high write-ability. In one embodiment, a perpendicular magnetic recording medium has at least a soft-magnetic underlayer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a magnetic recording layer successively formed on a substrate. The magnetic recording layer is composed of ferromagnetic crystal grains and oxides or nitrides, the third intermediate layer is composed of Ru or an Ru alloy, the second intermediate layer is composed of a metal or an alloy having the face-centered cubic lattice structure, and the first intermediate layer is composed of a metal or an alloy having the hexagonal close-packed structure.
Abstract translation: 本发明的实施例提供了一种垂直磁记录介质，其不仅在中间层的厚度等于或小于约20的介质的区域中彼此之间实现磁记录层中的晶粒的磁隔离 nm，但也具有优异的晶体学结构，表现出中等的中等噪声，优异的热稳定性和高的写入能力。 在一个实施例中，垂直磁记录介质至少具有在基板上依次形成的软磁性底层，第一中间层，第二中间层，第三中间层和磁记录层。 磁记录层由铁磁性晶粒和氧化物或氮化物构成，第三中间层由Ru或Ru合金构成，第二中间层由具有面心立方晶格结构的金属或合金构成， 第一中间层由具有六方密堆积结构的金属或合金构成。
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8.发明授权公开(公告)号：US07534507B2
公开(公告)日：2009-05-19
申请号：US11243012
申请日：2005-10-03
Applicant: Reiko Arai , Yoshiyuki Hirayama , Yuzuru Hosoe , Tomio Iwasaki , Yoko Ogawa , Ikuko Takekuma
Inventor： Reiko Arai , Yoshiyuki Hirayama , Yuzuru Hosoe , Tomio Iwasaki , Yoko Ogawa , Ikuko Takekuma
IPC: G11B5/66
Abstract: Embodiments of the invention are directed to a medium which provides high media S/N and good corrosion resistance. According to one embodiment, in a perpendicular magnetic recording medium at least comprising a soft-magnetic underlayer, a seed layer, an intermediate layer, a magnetic recording layer and an overcoat layer which are stacked over a substrate in order, the magnetic recording layer has a granular structure which includes many columnar grains of CoCrPt alloy and a grain boundary layer containing an oxide, the seed layer is made of TaNi alloy or TaTi alloy and the intermediate layer is made of Ru or Ru alloy which contains 80 at. % Ru or more.
Abstract translation: 本发明的实施方案涉及提供高介质S / N和良好耐腐蚀性的介质。 根据一个实施例，在依次层叠在基板上的至少包括软磁性底层，种子层，中间层，磁记录层和覆盖层的垂直磁记录介质中，磁记录层具有 包括许多CoCrPt合金的柱状晶粒和含有氧化物的晶界层的粒状结构，种子层由TaNi合金或TaTi合金制成，中间层由含有80at的Ru或Ru合金制成。 ％Ru或更多。
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公开(公告)号：US20060057431A1
公开(公告)日：2006-03-16
申请号：US11227675
申请日：2005-09-14
Applicant: Ichiro Tamai , Ikuko Takekuma , Yoshiyuki Hirayama , Yuzuru Hosoe , Yoshinori Honda
Inventor： Ichiro Tamai , Ikuko Takekuma , Yoshiyuki Hirayama , Yuzuru Hosoe , Yoshinori Honda
CPC classification number: G11B5/7325 , G11B5/65 , G11B5/656
Abstract: Embodiments of the embodiment are directed to reducing the inter-granular exchange coupling of an oxide granular medium and obtaining a high media S/N value, resulting in an areal recording density greater than 23 gigabits per square centimeter or more being achieved. In one embodiment, a magnetic recording medium comprises a structure laminating a soft-magnetic underlayer, a lower intermediate layer including Ru, an upper intermediate layer consisting of Ru crystal grains and oxide crystal grain boundaries, a magnetic recording layer consisting of crystal grains and oxide crystal grain boundaries, in order, on a substrate, growing crystal grains of the magnetic recording layer epitaxially on the Ru crystal grains of the upper intermediate layer, and growing the crystal grain boundaries of the magnetic recording layer on the crystal grain boundaries of the upper intermediate layer.
Abstract translation: 实施例的实施例涉及减少氧化物颗粒介质的颗粒间交换耦合并获得高介质S / N值，导致实现大于23千兆比特/平方厘米或更大的面积记录密度。 在一个实施例中，磁记录介质包括层压软磁性底层，包含Ru的下中间层，由Ru晶粒和氧化物晶界组成的上中间层的结构，由晶粒和氧化物组成的磁记录层 晶粒边界依次在衬底上，外延地在上层中间层的Ru晶粒上生长磁记录层的晶粒，并且使上述记录层的晶界上的磁记录层的晶界生长 中间层。
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公开(公告)号：US20050058854A1
公开(公告)日：2005-03-17
申请号：US10875601
申请日：2004-06-25
Applicant: Ikuko Takekuma , Hiroyuki Nakagawa , Ichiro Tamai , Yoshiyuki Hirayama , Yuzuru Hosoe
Inventor： Ikuko Takekuma , Hiroyuki Nakagawa , Ichiro Tamai , Yoshiyuki Hirayama , Yuzuru Hosoe
Abstract: Disclosed here is a perpendicular magnetic recording medium for realizing a high media S/N value without degrading the magnetic isolation of crystal grains from each another. The perpendicular magnetic recording medium comprises a substrate, a soft magnetic underlayer formed on the substrate, an intermediate layer formed on the soft magnetic underlayer, and a magnetic recording layer formed on the intermediate layer. The intermediate layer consists of at least two or more layers and contains Ru or an Ru alloy and the magnetic recording layer is made of a material containing a CoCrPt alloy and oxygen. The crystallo graphic orientation of the recording layer can be improved enough without increasing the crystal grain size if a full width at half-maximum Δθ50 of the Rocking curves of the Ru (0002) diffraction peak measured by an X-ray diffraction method is 5° and under.
Abstract translation: 这里公开的是用于实现高介质S / N值而不降低晶粒的磁隔离的垂直磁记录介质。 垂直磁记录介质包括基板，形成在基板上的软磁性底层，形成在软磁性底层上的中间层和形成在中间层上的磁记录层。 中间层由至少两层或更多层组成，并含有Ru或Ru合金，磁记录层由含有CoCrPt合金和氧的材料制成。 如果通过X射线衍射法测量的Ru（0002）衍射峰的摇摆曲线的半最大值Deltatheta50的全宽为5°，则记录层的结晶图形取向可以足够改善，而不增加晶粒尺寸 和下。
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