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1.发明申请公开(公告)号：US20050042367A1
公开(公告)日：2005-02-24
申请号：US10952735
申请日：2004-09-30
申请人： Hiroaki Nemoto , Hiroyuki Nakagawa , Yuzuru Hosoe
发明人： Hiroaki Nemoto , Hiroyuki Nakagawa , Yuzuru Hosoe
IPC分类号： G11B5/00 , G11B5/64 , G11B5/66 , G11B5/673 , G11B5/738 , G11B5/84 , H01F10/16 , H01F41/32 , B05D3/00
CPC分类号： G11B5/84 , G11B5/656 , G11B5/66 , G11B2005/0029 , Y10T428/12646 , Y10T428/12875 , Y10T428/12931 , Y10T428/24975 , Y10T428/265
摘要： A perpendicular magnetic recording medium, which has a low level of recording noise and sufficiently large perpendicular magnetic anisotropy energy relative to demagnetizing field energy, includes a substrate and a multi-layered magnetic film. The multi-layered magnetic film is composed of ferromagnetic metal layers of Co alloy containing at least Cr and non-magnetic metal layers of Pd alloy, each one layer of which are laminated alternately on top of one layer of the other. The ferromagnetic metal layers and the non-magnetic metal layers have a thickness of d1 and d2, respectively, with the ratio of d1/d2 being in the range of 1.5 to 4.0. This specific layer structure reduces the magnetic exchange interaction between magnetic particles in the multi-layered magnetic film. Therefore, the perpendicular magnetic recording medium is stable against thermal disturbance and has a low level of recording noise.
摘要翻译： 相对于去磁场能量，具有低水平的记录噪声和足够大的垂直磁各向异性能的垂直磁记录介质包括基底和多层磁性膜。 多层磁性膜由至少含有Cr的Co合金的铁磁性金属层和Pd合金的非磁性金属层构成，其中的每一层交替层叠在另一层之上。 强磁性金属层和非磁性金属层的厚度分别为d1和d2，d1 / d2的比例在1.5至4.0的范围内。 该特定的层结构减少了多层磁性膜中磁性颗粒之间的磁交换相互作用。 因此，垂直磁记录介质对于热干扰是稳定的并且具有低水平的记录噪声。
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公开(公告)号：US06815083B2
公开(公告)日：2004-11-09
申请号：US10217478
申请日：2002-08-14
申请人： Hiroaki Nemoto , Hiroyuki Nakagawa , Yuzuru Hosoe
发明人： Hiroaki Nemoto , Hiroyuki Nakagawa , Yuzuru Hosoe
IPC分类号： G11B5673
CPC分类号： G11B5/84 , G11B5/656 , G11B5/66 , G11B2005/0029 , Y10T428/12646 , Y10T428/12875 , Y10T428/12931 , Y10T428/24975 , Y10T428/265
摘要： A perpendicular magnetic recording medium, which has a low level of recording noise and sufficiently large perpendicular magnetic anisotropy energy relative to demagnetizing field energy, includes a substrate and a multi-layered magnetic film. The multi-layered magnetic film is composed of ferromagnetic metal layers of Co alloy containing at least Cr and non-magnetic metal layers of Pd alloy, each one layer of which are laminated alternately on top of one layer of the other. The ferromagnetic metal layers and the non-magnetic metal layers have a thickness of d1 and d2, respectively, with the ratio of d1/d2 being in the range of 1.5 to 4.0. This specific layer structure reduces the magnetic exchange interaction between magnetic particles in the multi-layered magnetic film. Therefore, the perpendicular magnetic recording medium is stable against thermal disturbance and has a low level of recording noise.
摘要翻译： 相对于去磁场能量，具有低水平的记录噪声和足够大的垂直磁各向异性能的垂直磁记录介质包括基底和多层磁性膜。 多层磁性膜由至少含有Cr的Co合金的铁磁性金属层和Pd合金的非磁性金属层构成，其中的每一层交替层叠在另一层之上。 强磁性金属层和非磁性金属层的厚度分别为d1和d2，d1 / d2的比例在1.5至4.0的范围内。 该特定的层结构减少了多层磁性膜中磁性颗粒之间的磁交换相互作用。 因此，垂直磁记录介质对于热干扰是稳定的并且具有低水平的记录噪声。
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3.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：US06773826B2
公开(公告)日：2004-08-10
申请号：US10076420
申请日：2002-02-19
申请人： Hiroyuki Nakagawa , Hiroaki Nemoto , Yuzuru Hosoe
发明人： Hiroyuki Nakagawa , Hiroaki Nemoto , Yuzuru Hosoe
IPC分类号： G11B564
CPC分类号： G11B5/667 , G11B5/7325 , Y10T428/12806 , Y10T428/12854 , Y10T428/12861 , Y10T428/12931 , Y10T428/265
摘要： A perpendicular magnetic recording medium and a magnetic storage apparatus, which show an excellent S/N ratio and are suitable for ultra high density magnetic recording, are provided. In the perpendicular magnetic recording medium having a recording layer composed of at least two layers of a main recording layer formed above a substrate and a thermally-stabilizing layer formed on the main recording layer, the thermally-stabilizing layer being formed closer to a surface of the medium than the main recording layer, alloy containing Co and Cr as a main component, which shows a low noise property, is used as the main recording layer, amorphous alloy containing rare earth metals and 3d transition metals as a main component, which is excellent in thermal stability, is used as the thermally-stabilizing layer, and a cap layer formed of alloy containing Co and Cr as a main component is formed on a surface of the thermally-stabilizing layer.
摘要翻译： 提供了显示优异的S / N比并且适用于超高密度磁记录的垂直磁记录介质和磁存储装置。 在具有由形成在基板上形成的主记录层的至少两层和由主记录层形成的热稳定层构成的记录层的垂直磁记录介质中，形成为更靠近表面的热稳定层 使用显示低噪声特性的Co和Cr作为主要成分的合金作为主记录层，使用含有稀土金属和3d过渡金属作为主要成分的非晶态合金作为主记录层，其为 热稳定性优异，作为热稳定层的表面形成由Co和Cr作为主要成分的合金形成的盖层。
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4.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
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/656
摘要： 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.
摘要翻译： 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：US20050058854A1
公开(公告)日：2005-03-17
申请号：US10875601
申请日：2004-06-25
摘要： 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.
摘要翻译： 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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公开(公告)号：US20080182134A1
公开(公告)日：2008-07-31
申请号：US12079701
申请日：2008-03-27
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/656
摘要： 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.
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7.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
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/656
摘要： 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.
摘要翻译： 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
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/656
摘要： 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.
摘要翻译： 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：US09099140B2
公开(公告)日：2015-08-04
申请号：US12630707
申请日：2009-12-03
CPC分类号： G11B5/667 , G11B5/66 , G11B5/7325
摘要： In order to provide a thermal energy assisted medium capable of improving anti-sliding reliability over long periods of time in low flying head conditions, while also maintaining a high SNR, a unique medium is proposed. A soft magnetic layer is formed on a substrate, a soft magnetic layer is formed thereon via a non-magnetic intermediate layer, and an intermediate layer, a crystal oriented control intermediate layer, an artificial lattice intermediate layer having an artificial lattice film in which a first layer comprising Co and a second layer comprising Pt and Pd are laminated repeatedly to form a recording layer, and a cap layer and an lubricating layer are formed. The concentration of Pd comprising the second layer is from about 20 atomic % to about 40 atomic %. Other mediums and systems are also described.
摘要翻译： 为了提供能够在低飞行头条件下长时间提高抗滑动可靠性的热能辅助介质，同时还保持高SNR，提出了独特的介质。 在基板上形成软磁性层，通过非磁性中间层，中间层，取向晶体管的中间层，具有人造晶格膜的人造晶格中间层，在其上形成软磁性层，其中， 重复层叠包括Co和包含Pt和Pd的第二层的第一层以形成记录层，并且形成覆盖层和润滑层。 包含第二层的Pd的浓度为约20原子％至约40原子％。 还描述了其它介质和系统。
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公开(公告)号：US07625646B2
公开(公告)日：2009-12-01
申请号：US11354085
申请日：2006-02-15
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
IPC分类号： G11B5/66
摘要： Disclosed are a perpendicular magnetic recording medium with lower medium noise, insusceptible to thermal fluctuation and high recording resolution and a method of manufacturing it. As the step of forming a metal layer at the time of forming a recording layer on a non-magnetic substrate via a plurality of underlayers and the step of forming an oxide layer with an average thickness of 0.2 nm or less are repeated, the crystal grains are magnetically isolated without disturbing the orientation of the crystal grain of the recording layer of the perpendicular magnetic recording medium or without degrading the magnetic characteristic of the crystal grain of the recording layer.
摘要翻译： 公开了一种具有较低介质噪声，不易受热波动和高记录分辨率的垂直磁记录介质及其制造方法。 作为通过多个底层在非磁性基板上形成记录层时形成金属层的步骤，重复平均厚度为0.2nm以下的氧化物层的工序，晶粒 磁性隔离，而不会干扰垂直磁记录介质的记录层的晶粒的取向，或不降低记录层的晶粒的磁特性。
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