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公开(公告)号：US08802247B2
公开(公告)日：2014-08-12
申请号：US11582878
申请日：2006-10-17
CPC分类号： G11B5/667
摘要： A medium having high medium S/N and excellent corrosion resistance is achieved. In one embodiment, an adhesion layer, a soft magnetic layer, an intermediate layer, a magnetic recording layer, and a protective layer are deposited, in order, on a substrate. The soft magnetic underlayer consists at least of two soft magnetic layers, the first soft magnetic layer formed on the recording layer side being composed of an amorphous alloy containing 85 at. % or less of Co, and the second soft magnetic layer formed on the substrate side being composed of an alloy containing more than 85 at. % of Co.
摘要翻译： 实现了具有高介质S / N和优异耐腐蚀性的介质。 在一个实施例中，粘附层，软磁层，中间层，磁记录层和保护层依次沉积在基板上。 软磁性底层至少由两个软磁性层构成，记录层侧形成的第一软磁性层由含有85μm的非晶态合金构成。 Co以下的合金，由基板侧形成的第二软磁性层由含有85以上的合金构成。 有限公司
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公开(公告)号：US08390956B2
公开(公告)日：2013-03-05
申请号：US12793608
申请日：2010-06-03
申请人： Shun Tonooka , Reiko Arai , Hiroyuki Nakagawa , Kiwamu Tanahashi
发明人： Shun Tonooka , Reiko Arai , Hiroyuki Nakagawa , Kiwamu Tanahashi
CPC分类号： G11B5/732 , G11B5/667 , Y10T428/24975
摘要： According to one embodiment, a perpendicular magnetic recording medium includes at least one soft magnetic underlayer above a substrate, a seed layer above the at least one soft magnetic underlayer, an intermediate layer above the seed layer, a magnetic recording layer above the intermediate layer, and an overcoat layer above the magnetic recording layer, wherein the seed layer includes a second seed layer above a first seed layer. In another embodiment, the seed layer is a multilayered structure of at least two cycles of a unit of layered film which includes a first seed layer and a second seed layer. The first seed layer includes a non-magnetic alloy having a Face-Centered-Cubic (FCC) structure, and the second seed layer includes a soft magnetic alloy having a FCC structure. Other structures are also disclosed, according to more embodiments.
摘要翻译： 根据一个实施例，垂直磁记录介质包括至少一个在基底上方的软磁性底层，至少一个软磁性底层上方的晶种层，种子层上方的中间层，中间层上方的磁记录层， 以及在所述磁记录层上方的覆盖层，其中所述种子层包括在第一种子层上方的第二种子层。 在另一个实施方案中，种子层是包括第一种子层和第二种子层的分层膜单元的至少两个循环的多层结构。 第一晶种层包括具有面心立方（FCC）结构的非磁性合金，第二晶种层包括具有FCC结构的软磁合金。 根据更多实施例，还公开了其他结构。
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公开(公告)号：US20070087226A1
公开(公告)日：2007-04-19
申请号：US11582878
申请日：2006-10-17
IPC分类号： G11B5/66
CPC分类号： G11B5/667
摘要： A medium having high medium S/N and excellent corrosion resistance is achieved. In one embodiment, an adhesion layer, a soft magnetic layer, an intermediate layer, a magnetic recording layer, and a protective layer are deposited, in order, on a substrate. The soft magnetic underlayer consists at least of two soft magnetic layers, the first soft magnetic layer formed on the recording layer side being composed of an amorphous alloy containing 85 at. % or less of Co, and the second soft magnetic layer formed on the substrate side being composed of an alloy containing more than 85 at. % of Co.
摘要翻译： 实现了具有高介质S / N和优异耐腐蚀性的介质。 在一个实施例中，依次将粘合层，软磁层，中间层，磁记录层和保护层沉积在基板上。 软磁性底层至少由两个软磁性层构成，记录层侧形成的第一软磁性层由含有85μm的非晶态合金构成。 Co以下的合金，由基板侧形成的第二软磁性层由含有85个以上的合金构成。 有限公司
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14.发明申请公开(公告)号：US20060088734A1
公开(公告)日：2006-04-27
申请号：US11243012
申请日：2005-10-03
申请人： Reiko Arai , Yoshiyuki Hirayama , Yuzuru Hosoe , Tomio Iwasaki , Yoko Ogawa , Ikuko Takekuma
发明人： Reiko Arai , Yoshiyuki Hirayama , Yuzuru Hosoe , Tomio Iwasaki , Yoko Ogawa , Ikuko Takekuma
摘要： 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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公开(公告)号：US06728081B2
公开(公告)日：2004-04-27
申请号：US10419238
申请日：2003-04-21
申请人： Reiko Arai , Yoshiaki Kawato , Katsuro Watanabe
发明人： Reiko Arai , Yoshiaki Kawato , Katsuro Watanabe
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3909 , G11B5/3919 , G11B5/3932 , G11B2005/3996
摘要： The invention provides a magnetoresistive effect sensor that is a yoke type magnetoresistive effect sensor having a tunnel magnetoresistive effect film, which is operated stably with suppressed Barkhausen noise, and provides a reproducing head and a magnetic disk apparatus that use the magnetoresistive effect sensor. The magnetoresistive effect sensor is provided with a tunnel magnetoresistive effect film, a pair of electrodes for supplying a current in the film thickness direction of the magnetoresistive effect film, and a magnetic flux guide for guiding a magnetic flux from the recording medium: surface to the magnetoresistive effect film, wherein the magnetic domain of a free layer of the tunnel type magnetoresistive effect film and the magnetic domain of the magnetic flux guide are both controllable together.
摘要翻译： 本发明提供一种磁阻效应传感器，其是具有隧道磁阻效应膜的磁轭式磁阻效应传感器，其通过抑制巴克豪森噪声稳定地操作，并且提供使用磁阻效应传感器的再现磁头和磁盘装置。 磁阻效应传感器设置有隧道磁阻效应膜，用于提供磁阻效应膜的膜厚度方向的电流的一对电极和用于将磁通量从记录介质引导到表面的磁通引导件 磁阻效应膜，其中隧道型磁阻效应膜的自由层的磁畴和磁通量的磁畴都可控制在一起。
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16.发明授权Magnetic storage/read system with read head including magnetoresistive element 失效具有读磁头的磁存储/读取系统，包括磁阻元件
公开(公告)号：US5933297A
公开(公告)日：1999-08-03
申请号：US45189
申请日：1993-04-13
申请人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
发明人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/09 , G11B5/3903 , G11B5/3909 , G11B5/3919 , G11B5/3967 , G11B5/398 , G11B5/4886 , G11B2005/3996
摘要： A magnetic storage/read system includes a recording medium for magnetically storing a signal and a magnetoresistive element which is driven relative to the recording medium. The magnetoresistive element may include a substrate, a first antiferromagnetic film, a first ferromagnetic film, a first nonmagnetic film, a soft magnetic film, a second nonmagnetic film, a second ferromagnetic film, and a second antiferromagnetic film, wherein the films are sequentially layered directly on the substrate with no intervening layer between any of the films. At least one of the first antiferromagnetic film and the second antiferromagnetic film may be made of nickel oxide. The first ferromagnetic film and the second ferromagnetic film have a first magnetization which is fixed in a predetermined direction, and the soft magnetic film has a second magnetization which is rotatable in response to a magnetic field from the recording medium such that an angle between a direction of the second magnetization and the predetermined direction in which the first magnetization is fixed varies in response to the magnetic field from the recording medium, thereby producing a magnetoresistive effect.
摘要翻译： 磁存储/读取系统包括用于磁存储信号的记录介质和相对于记录介质驱动的磁阻元件。 磁阻元件可以包括基板，第一反铁磁膜，第一铁磁膜，第一非磁性膜，软磁膜，第二非磁性膜，第二铁磁膜和第二反铁磁膜，其中膜依次层叠 直接在衬底上，在任何膜之间没有中间层。 第一反铁磁膜和第二反铁磁膜中的至少一个可以由氧化镍制成。 第一铁磁膜和第二铁磁膜具有沿预定方向固定的第一磁化，并且软磁膜具有可响应于来自记录介质的磁场而旋转的第二磁化，使得在方向 第二磁化和第一磁化固定的预定方向响应于来自记录介质的磁场而变化，由此产生磁阻效应。
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17.发明授权公开(公告)号：US07875373B2
公开(公告)日：2011-01-25
申请号：US11985310
申请日：2007-11-13
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Reiko Arai
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Reiko Arai
IPC分类号： G11B5/65
CPC分类号： G11B5/65 , G11B5/7325 , G11B5/851 , Y10T428/11
摘要： Embodiments in accordance with the present invention help to obtain a perpendicular magnetic recording medium having a granular structure, excellent recording/reproducing properties, and excellent durability. According to one embodiment, a recording layer includes a layer which has crystal grains mainly composed of cobalt and crystal grain boundaries mainly composed of the oxide; the oxygen content of the recoding layer is changed in the film thickness direction; the oxygen content in the area in the vicinity of the interface between the recording layer and the intermediate layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer; and the oxygen content in the area in the vicinity of the interface between the recording layer and the protective layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer.
摘要翻译： 根据本发明的实施例有助于获得具有颗粒结构的良好的记录/再现性能和优异的耐久性的垂直磁记录介质。 根据一个实施例，记录层包括主要由钴构成的晶粒和主要由氧化物构成的晶界的层; 记录层的氧含量在膜厚方向上变化; 记录层和中间层之间的界面附近的区域中的氧含量低于记录层中心附近的区域中的氧含量; 并且将记录层和保护层之间的界面附近的区域中的氧含量设定得低于记录层中心附近的区域中的氧含量。
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18.发明授权公开(公告)号：US07875371B2
公开(公告)日：2011-01-25
申请号：US11107588
申请日：2005-04-15
申请人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
发明人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded magnetization to be caused by stray fields. In one embodiment, a perpendicular recording layer is formed over a substrate with a soft magnetic underlayer therebetween, then an amorphous or nano-crystalline layer is formed between the substrate and the soft magnetic underlayer. The soft magnetic underlayer includes first and second amorphous soft magnetic layers, as well as a nonmagnetic layer formed between those first and second amorphous soft magnetic layers. The first and second amorphous soft magnetic layers are given uniaxial anisotropy in the radial direction of the substrate respectively and coupled with each other antiferromagnetically.
摘要翻译： 本发明的实施例提供了一种改进的飞行能力，高读取信号质量并能够抑制由杂散场引起的记录磁化的磁衰减的垂直磁记录介质。 在一个实施例中，垂直记录层在其上具有软磁性底层的衬底上形成，然后在衬底和软磁性底层之间形成无定形或纳米晶层。 软磁性底层包括第一和第二非晶软磁性层，以及在这些第一和第二非晶软磁性层之间形成的非磁性层。 第一和第二非晶软磁性层分别在基板的径向方向上具有单轴各向异性，并且彼此反铁磁耦合。
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19.发明申请PERPENDICULAR MAGNETIC RECORDING MEDIUM (PMRM) AND MAGNETIC STORAGE DEVICE USING THE SAME 有权全磁磁记录介质（PMRM）和使用其的磁性存储装置公开(公告)号：US20110002064A1
公开(公告)日：2011-01-06
申请号：US12828073
申请日：2010-06-30
申请人： Hiroyuki Nakagawa , Reiko Arai , Ichiro Tamai , Kiwamu Tanahashi
发明人： Hiroyuki Nakagawa , Reiko Arai , Ichiro Tamai , Kiwamu Tanahashi
CPC分类号： G11B5/66 , G11B5/1278 , G11B5/65
摘要： According to one embodiment, a PMRM includes a substrate, a soft magnetic underlayer above the substrate, an underlayer above the soft magnetic underlayer, an oxide-containing magnetic layer above the underlayer, and a ferromagnetic layer above the magnetic layer having no oxides. The underlayer controls orientation and segregation of the magnetic layer. The oxide-containing magnetic layer comprises at least two or more magnetic layers, a Cr concentration of the magnetic layer adjacent to the ferromagnetic metal layer is between about 23 at. % and about 32 at. %, and a difference between the Cr concentration of the magnetic layer adjacent to the ferromagnetic metal layer and a magnetic layer having a lowest Cr concentration among the at least three magnetic layers is less than about 25 at. %, the magnetic layer with a lowest Cr concentration has a granular structure, and a nucleation field is greater than about 159.2 kA/m.
摘要翻译： 根据一个实施例，PMRM包括衬底，衬底上方的软磁性底层，软磁性底层上方的底层，底层上方的含氧化物的磁性层以及不含氧化物的磁性层上方的铁磁性层。 底层控制磁性层的取向和偏析。 含氧化物的磁性层包括至少两个或更多个磁性层，与强磁性金属层相邻的磁性层的Cr浓度在约23at。 ％和约32英寸。 ％，并且与所述强磁性金属层相邻的磁性层的Cr浓度与所述至少三个磁性层中具有最低Cr浓度的磁性层之间的差异小于约25at。 ％，具有最低Cr浓度的磁性层具有粒状结构，并且成核场大于约159.2kA / m。
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20.发明申请公开(公告)号：US20070285839A1
公开(公告)日：2007-12-13
申请号：US11804197
申请日：2007-05-16
IPC分类号： G11B5/74
CPC分类号： G11B5/667 , C23C14/3414 , G11B5/7325 , G11B5/851
摘要： Embodiments of the present invention improve the production efficiency of a perpendicular recording medium while ensuring the scratch resistance thereof. In order to realize high production stability in the high speed production of perpendicular recording media, a target is not provided with a texture of a low melting point or the ratio thereof is decreased. Thus according to one embodiment of the present invention, upon forming a layer having an element of a low melting point in the constituent layers of a perpendicular recording medium, a target can be made using an alloy powder previously formed of an intermetallic compound having a melting point higher than 660° C., thereby preventing thermal deformation.
摘要翻译： 本发明的实施例提高垂直记录介质的生产效率，同时确保其耐刮擦性。 为了在垂直记录介质的高速生产中实现高生产稳定性，目标物不具有低熔点组织或其比例降低。 因此，根据本发明的一个实施方案，在垂直记录介质的构成层中形成具有低熔点元素的层时，可以使用预先由熔融的金属间化合物形成的合金粉末来制备靶 高于660℃，从而防止热变形。
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