-
公开(公告)号：US07625644B2
公开(公告)日：2009-12-01
申请号：US11257978
申请日：2005-10-24
IPC分类号： G11B5/66
摘要： In a granular magnetic recording layer of a perpendicular magnetic recording medium, media noises are reduced by separating adequately magnetic crystal grains and non-magnetic grain boundary and decreasing magnetic exchange interactions among the magnetic crystal grains without causing damage to magnetic anisotropy of the magnetic crystal grains. In one embodiment, the perpendicular magnetic recording medium, in which crystal alloy grains containing Co, Pt, and Cr, and non-magnetic grain boundary containing Si and O is included; the ratio of the number of O atom to that of Si atom in the magnetic recording layer is between about 2.5 and 5; the Si atomic composition in the magnetic recording layer is between about 3 and 6 atomic %; and the O atomic composition in the magnetic recording layer is between about 12 and 20 atomic %, is used. The in-plane distribution of perpendicular coercivity at any points of the medium of the magnetic recording layer is made at most about ±10% of an average value.
摘要翻译： 在垂直磁记录介质的粒状磁记录层中，通过分离磁性晶粒和非磁性晶界以及降低磁晶粒之间的磁交换相互作用而不损害磁性晶粒的磁各向异性来降低介质噪声 。 在一个实施例中，包括含有Co，Pt和Cr的晶体合金晶粒和含有Si和O的非磁性晶界的垂直磁记录介质; 磁记录层中的O原子数与Si原子数的比例在约2.5和5之间; 磁记录层中的Si原子组成在约3和6原子％之间; 并且使用磁记录层中的O原子组成为约12至20原子％。 在磁记录层的介质的任何点处的垂直矫顽力的平面内分布最多为平均值的约±10％。
-
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。
-
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：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。
-
公开(公告)号：US20070223142A1
公开(公告)日：2007-09-27
申请号：US11726099
申请日：2007-03-20
CPC分类号： G11B5/66 , G11B5/11 , G11B5/1278 , G11B5/3116 , G11B5/3146 , G11B5/315 , G11B5/3967 , G11B5/656
摘要： According to embodiments of the present invention, a shielded pole writer and a perpendicular magnetic recording medium suitable thereto are combined to provide high medium SNR and excellent OW characteristic simultaneously. A perpendicular magnetic recording medium of a magnetic storage apparatus mounting a shielded pole writer, including a perpendicular magnetic recording medium having a recording layer of a three layered structure is used. A first recording layer has a granular structure consisting of grain boundaries containing an oxide and columnar grains comprising a CoCrPt alloy, in which a second recording layer and a third recording layer formed thereabove comprise Co as a main ingredient, contain Cr and do not contain an oxide, and the Cr concentration in the second recording layer is lower than the Cr concentration in the third recording layer.
摘要翻译： 根据本发明的实施例，组合屏蔽极写入器和适合于其的垂直磁记录介质，以同时提供高中等信噪比和优异的OW特性。 使用安装屏蔽极写入器的磁存储装置的垂直磁记录介质，其包括具有三层结构的记录层的垂直磁记录介质。 第一记录层具有由包含氧化物的晶界和包含CoCrPt合金的柱状晶粒构成的粒状结构，其中形成在其上的第二记录层和第三记录层包含Co作为主要成分，并且不含有 并且第二记录层中的Cr浓度低于第三记录层中的Cr浓度。
-
公开(公告)号：US07033686B2
公开(公告)日：2006-04-25
申请号：US10701603
申请日：2003-11-06
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
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.
-
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。
-
7.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
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。
-
公开(公告)号：US07510789B2
公开(公告)日：2009-03-31
申请号：US11148164
申请日：2005-06-09
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。
-
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.
-
公开(公告)号：US06916557B2
公开(公告)日：2005-07-12
申请号：US10372335
申请日：2003-02-25
IPC分类号： G11B5/65 , B32B3/00 , G11B5/147 , G11B5/64 , G11B5/66 , G11B5/667 , G11B5/70 , G11B5/73 , G11B5/851
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.
-
-
-
-
-
-
-
-
-
搜索结果
96 条记录 (耗时 0.023 秒)
