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公开(公告)号：US20120113768A1
公开(公告)日：2012-05-10
申请号：US13384933
申请日：2010-08-19
申请人： Tetsuya Kanbe , Yuzo Sasaki , Atsushi Hashimoto
发明人： Tetsuya Kanbe , Yuzo Sasaki , Atsushi Hashimoto
CPC分类号： G11B5/7325 , G11B5/6088 , G11B5/656 , G11B5/82 , G11B2005/0021
摘要： A heat-assisted magnetic recording medium that includes a substrate 1, underlayers formed on the substrate 1, and a magnetic layer 5 which is formed on the underlayers and contains either an FePt alloy having an L10 structure or a CoPt alloy having an L10 structure as a main component, wherein the underlayers include a first underlayer 2 formed from an amorphous alloy, a second underlayer 3 formed from an alloy having a BCC structure containing Cr as a main component and also containing at least one element selected from among Ti, Mo, W, V, Mn and Ru, and a third underlayer 4 formed from MgO. Also, a magnetic storage device that uses the heat-assisted magnetic recording medium.
摘要翻译： 一种热辅助磁记录介质，其包括基板1，形成在基板1上的底层和形成在底层上的磁性层5，并且包含具有L10结构的FePt合金或具有L10结构的CoPt合金作为 主要成分，其中底层包括由非晶合金形成的第一底层2，由具有包含Cr作为主要成分的BCC结构的合金形成的第二底层3，并且还含有选自Ti，Mo， W，V，Mn和Ru，以及由MgO形成的第三底层4。 而且，使用该热辅助磁记录介质的磁存储装置。
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2.发明申请公开(公告)号：US20100215991A1
公开(公告)日：2010-08-26
申请号：US12671452
申请日：2008-07-25
CPC分类号： G11B5/7325 , G11B5/82 , G11B5/851
摘要： A perpendicular magnetic recording medium is provided, which has a soft magnetic layer, a seed layer, a first intermediate layer, a second intermediate layer and a perpendicular magnetic recording layer, formed in this order on a non-magnetic substrate, and is characterized in that the seed layer is comprised of a (002) crystal plane-orientated hcp structure, the first intermediate layer is comprised of a (110) crystal plane-orientated bcc structure and the second intermediate layer is comprised of a (002) crystal plane-orientated hcp structure. The (110) crystal plane-orientated bcc structure comprises at least 60 atomic % of Cr. The magnetic recording medium has fine and well discrete magnetic crystal grains with extremely small size and exhibits good perpendicular orientation in the perpendicular magnetic recording layer, and thus, the medium is capable of recording and reproducing information with high density.
摘要翻译： 提供了一种垂直磁记录介质，其具有在非磁性基板上依次形成的软磁性层，种子层，第一中间层，第二中间层和垂直磁记录层，其特征在于 种子层由（002）晶面取向的hcp结构构成，第一中间层由（110）晶面定向的bcc结构构成，第二中间层由（002）晶面取向的hcp结构构成， 定向hcp结构。 （110）晶面取向的bcc结构包含至少60原子％的Cr。 磁记录介质具有极小尺寸的精细且分散的磁晶粒，并且在垂直磁记录层中呈现出良好的垂直取向，因此该介质能够以高密度记录和再现信息。
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3.发明授权公开(公告)号：US08034471B2
公开(公告)日：2011-10-11
申请号：US12536225
申请日：2009-08-05
申请人： Shinichi Ishibashi , Migaku Takahashi , Shin Saito , Yuzo Sasaki , Atsushi Hashimoto , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
发明人： Shinichi Ishibashi , Migaku Takahashi , Shin Saito , Yuzo Sasaki , Atsushi Hashimoto , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
IPC分类号： G11B5/66
摘要： In a perpendicular magnetic recording medium in which at least a soft magnetic underlayer, an orientation control layer, a magnetic recording layer and a protective layer are formed on a non-magnetic substrate in order from the bottom, the orientation control layer has a laminated structure of two or more layers including an intermediate layer and a seed layer which is disposed closer to the non-magnetic substrate than the intermediate layer. The seed layer includes two or more kinds of elements having a face-centered cubic structure, has face-centered cubic (111) plane crystals oriented in a direction perpendicular to a substrate surface, and has a pseudo-hexagonal structure.
摘要翻译： 在从底部起依次形成至少软磁性底层，取向控制层，磁记录层和保护层的垂直磁记录介质中，取向控制层具有层叠结构 包括比中间层更靠近非磁性基板设置的中间层和种子层的两层以上的层。 种子层包括具有面心立方结构的两种或更多种元件，具有在垂直于衬底表面的方向上取向的面心立方（111）面晶体，并且具有假六边形结构。
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4.发明申请公开(公告)号：US20100209741A1
公开(公告)日：2010-08-19
申请号：US12670815
申请日：2008-07-25
申请人： Yuzo Sasaki , Atsushi Hashimoto
发明人： Yuzo Sasaki , Atsushi Hashimoto
摘要： A perpendicular magnetic recording medium is provided, which has a soft magnetic layer, an under layer, an intermediate layer and a perpendicular magnetic recording layer, and is characterized in that the perpendicular magnetic recording layer is comprised of at least one magnetic layer, which magnetic layer or at least one of which magnetic layers comprises cobalt-based ferromagnetic crystal grains and grain boundaries comprised of an oxide, wherein the ferromagnetic crystal grains further comprise ruthenium. The perpendicular magnetic recording medium has ferromagnetic crystal grains with extremely small grain size and exhibiting enhanced discretion, as well as good perpendicular orientation in the perpendicular magnetic recording layer, and thus, the medium is capable of recording and reproducing information with high density.
摘要翻译： 提供一种具有软磁层，下层，中间层和垂直磁记录层的垂直磁记录介质，其特征在于垂直磁记录层由至少一个磁性层组成，该磁性层 层或其中至少一个磁性层包括钴基铁磁晶粒和由氧化物组成的晶界，其中铁磁晶粒还包含钌。 垂直磁记录介质具有极小的晶粒尺寸的铁磁晶粒，并且在垂直磁记录层中表现出增强的判断力以及良好的垂直取向，因此该介质能够高密度地记录和再现信息。
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5.发明授权公开(公告)号：US08512884B2
公开(公告)日：2013-08-20
申请号：US12675090
申请日：2008-08-28
申请人： Migaku Takahashi , Shin Saito , Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto , Akihiko Takeo , Tomoyuki Maeda
发明人： Migaku Takahashi , Shin Saito , Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto , Akihiko Takeo , Tomoyuki Maeda
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/7325 , G11B5/8404 , G11B5/851
摘要： A perpendicular magnetic recording medium including at least a soft under layer, an orientation control layer, a magnetic recording layer and a protective layer on a non-magnetic substrate, wherein the orientation control layer is composed of three or more layers including a seed layer, a first intermediate layer and a second intermediate layer sequentially, formed in that order from the substrate side, the crystal grains that constitute the first intermediate layer are epitaxially grown on the crystal grains of the seed layer, the crystal grains that constitute the second intermediate layer are epitaxially grown on the crystal grains of the first intermediate layer, and the crystal grains that constitute the second intermediate layer are finer than the crystal grains that constitute the first intermediate layer.
摘要翻译： 一种在非磁性基板上至少含有软底层，取向控制层，磁记录层和保护层的垂直磁记录介质，其中所述取向控制层由三层或更多层构成，包括种子层， 从衬底侧依次形成第一中间层和第二中间层，构成第一中间层的晶粒在籽晶层的晶粒上外延生长，构成第二中间层的晶粒 在第一中间层的晶粒上外延生长，构成第二中间层的晶粒比构成第一中间层的晶粒更细。
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公开(公告)号：US08279739B2
公开(公告)日：2012-10-02
申请号：US13384933
申请日：2010-08-19
申请人： Tetsuya Kanbe , Yuzo Sasaki , Atsushi Hashimoto
发明人： Tetsuya Kanbe , Yuzo Sasaki , Atsushi Hashimoto
IPC分类号： G11B3/70
CPC分类号： G11B5/7325 , G11B5/6088 , G11B5/656 , G11B5/82 , G11B2005/0021
摘要： A heat-assisted magnetic recording medium that includes a substrate, underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and contains either an FePt alloy having an L10 structure or a CoPt alloy having an L10 structure as a main component, wherein the underlayers include a first underlayer formed from an amorphous alloy, a second underlayer formed from an alloy having a BCC structure containing Cr as a main component and also containing at least one element selected from among Ti, Mo, W, V, Mn and Ru, and a third underlayer formed from MgO. Also, a magnetic storage device that uses the heat-assisted magnetic recording medium.
摘要翻译： 一种热辅助磁记录介质，其包括基板，形成在基板上的底层，和形成在底层上的磁性层，并且含有具有L10结构的FePt合金或具有L10结构的CoPt合金作为主要成分 其特征在于，所述底层包括由非晶合金形成的第一底层，由具有以Cr为主成分的BCC结构的合金形成的第二底层，还含有选自Ti，Mo，W，V，Mn中的至少一种元素 和Ru，以及由MgO形成的第三底层。 而且，使用该热辅助磁记录介质的磁存储装置。
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7.发明申请公开(公告)号：US20100188772A1
公开(公告)日：2010-07-29
申请号：US12692354
申请日：2010-01-22
申请人： Shingo Sasaki , Shin Saito , Migaku Takahashi , Atsushi Hashimoto , Yuzo Sasaki , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
发明人： Shingo Sasaki , Shin Saito , Migaku Takahashi , Atsushi Hashimoto , Yuzo Sasaki , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
摘要： There are provided a method for manufacturing a magnetic recording medium which is excellent in terms of both the recording and reproduction characteristics and the thermal fluctuation characteristics without reducing the density and hardness of the perpendicular magnetic layer; a magnetic recording medium; and a magnetic recording and reproducing apparatus with which an excellent recording density is achieved,wherein, in the method for manufacturing the magnetic recording medium,at least a portion of the perpendicular magnetic layer 4 is formed as a magnetic layer having a granular structure that contains Co as a major component and also contains an oxide of at least one nonmagnetic metal selected from the group consisting of Cr, Si, Ta, Al, Ti, W and Mg;a target for forming the perpendicular magnetic layer 4 by the sputtering process is prepared so as to include an oxide of Co and a compound of Co and at least one nonmagnetic metal selected from the group consisting of Cr, Si, Ta, Al, Ti, W and Mg, and to make the proportion of oxygen contained in the target higher than the proportion of oxygen contained in the perpendicular magnetic layer 4; anda sputtering gas pressure at the time of forming the perpendicular magnetic layer is set to 1 Pa or less.
摘要翻译： 提供了一种在不降低垂直磁性层的密度和硬度的情况下，在记录和再现特性以及热波动特性方面优异的磁记录介质的制造方法; 磁记录介质; 以及实现了良好的记录密度的磁记录和重放装置，其中在磁记录介质的制造方法中，垂直磁性层4的至少一部分形成为具有粒状结构的磁性层， Co作为主要成分，还含有选自Cr，Si，Ta，Al，Ti，W和Mg中的至少一种非磁性金属的氧化物; 制备通过溅射法形成垂直磁性层4的目标，以便包括Co的氧化物和Co的化合物和选自Cr，Si，Ta，Al，Ti的至少一种非磁性金属， W和Mg，并使靶中含有的氧的比例高于垂直磁性层4中所含的氧的比例; 在形成垂直磁性层时的溅射气体压力设定为1Pa以下。
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8.发明授权公开(公告)号：US08968526B2
公开(公告)日：2015-03-03
申请号：US12692354
申请日：2010-01-22
申请人： Shingo Sasaki , Shin Saito , Migaku Takahashi , Atsushi Hashimoto , Yuzo Sasaki , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
发明人： Shingo Sasaki , Shin Saito , Migaku Takahashi , Atsushi Hashimoto , Yuzo Sasaki , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
摘要： There are provided a method for manufacturing a magnetic recording medium which is excellent in terms of both the recording and reproduction characteristics and the thermal fluctuation characteristics without reducing the density and hardness of the perpendicular magnetic layer; a magnetic recording medium; and a magnetic recording and reproducing apparatus with which an excellent recording density is achieved, wherein, in the method for manufacturing the magnetic recording medium, at least a portion of the perpendicular magnetic layer 4 is formed as a magnetic layer having a granular structure that contains Co as a major component and also contains an oxide of at least one nonmagnetic metal selected from the group consisting of Cr, Si, Ta, Al, Ti, W and Mg; a target for forming the perpendicular magnetic layer 4 by the sputtering process is prepared so as to include an oxide of Co and a compound of Co and at least one nonmagnetic metal selected from the group consisting of Cr, Si, Ta, Al, Ti, W and Mg, and to make the proportion of oxygen contained in the target higher than the proportion of oxygen contained in the perpendicular magnetic layer 4; and a sputtering gas pressure at the time of forming the perpendicular magnetic layer is set to 1 Pa or less.
摘要翻译： 提供了一种在不降低垂直磁性层的密度和硬度的情况下，在记录和再现特性以及热波动特性方面优异的磁记录介质的制造方法; 磁记录介质; 以及实现了良好的记录密度的磁记录和重放装置，其中在磁记录介质的制造方法中，垂直磁性层4的至少一部分形成为具有粒状结构的磁性层， Co作为主要成分，还含有选自Cr，Si，Ta，Al，Ti，W和Mg中的至少一种非磁性金属的氧化物; 制备通过溅射法形成垂直磁性层4的目标，以便包括Co的氧化物和Co的化合物和选自Cr，Si，Ta，Al，Ti的至少一种非磁性金属， W和Mg，并使靶中含有的氧的比例高于垂直磁性层4中所含的氧的比例; 在形成垂直磁性层时的溅射气体压力设定为1Pa以下。
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9.发明授权公开(公告)号：US08133601B2
公开(公告)日：2012-03-13
申请号：US12674602
申请日：2008-08-25
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/7325
摘要： A magnetic recording medium is provided which can record and reproduce high-density information by maintaining perpendicular orientation of a magnetic recording layer even with a decrease in thickness of nonmagnetic layers from an intermediate layer to a seed layer while decreasing the grain size of magnetic crystal grains to be consistent with an increase in recording density. A manufacturing method thereof and a magnetic recording and reproducing apparatus are also provided. The magnetic recording medium is a perpendicular magnetic recording medium including at least an underlying layer, an orientation control layer, a magnetic recording layer, and a protective layer formed on a nonmagnetic substrate. Here, the orientation control layer includes two or more layers of a seed layer and an intermediate layer from the substrate side. Materials of the seed layer and the intermediate layer are selected so that a contact angle of the intermediate layer material with respect to the seed layer material, which is amorphous, is in the range of 10 to 100 degrees.
摘要翻译： 提供了一种磁记录介质，其可以通过保持磁记录层的垂直取向来记录和再现高密度信息，即使随着磁性晶粒的晶粒尺寸的减小，非磁性层从中间层到种晶层的厚度减小 与记录密度的增加一致。 还提供了其制造方法和磁记录和再现装置。 磁记录介质是至少包括下层，取向控制层，磁记录层和形成在非磁性基板上的保护层的垂直磁记录介质。 这里，取向控制层包括两层以上的种子层和从基板侧的中间层。 选择种子层和中间层的材料，使得中间层材料相对于无定形的种子层材料的接触角在10至100度的范围内。
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10.发明授权公开(公告)号：US08034472B2
公开(公告)日：2011-10-11
申请号：US12542372
申请日：2009-08-17
申请人： Shinichi Ishibashi , Migaku Takahashi , Shin Saito , Yuzo Sasaki , Atsushi Hashimoto , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
发明人： Shinichi Ishibashi , Migaku Takahashi , Shin Saito , Yuzo Sasaki , Atsushi Hashimoto , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , B82Y25/00 , B82Y40/00 , G11B5/65 , G11B5/667 , H01F10/3272 , H01F41/306
摘要： The present invention provides a magnetic recording medium which is capable of improving the perpendicular orientation of a perpendicular magnetic recording layer while maintaining a writing performance during recording and obtaining both an improvement in the perpendicular orientation and fine magnetic crystal particles with a uniform diameter, and which enables information to be recorded or reproduced at high density, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. A magnetic recording medium 10 according to the present invention includes at least a soft magnetic underlayer 2, an orientation control layer 3, a magnetic recording layer 4, and a protective layer 5 formed on a non-magnetic substrate 1. The orientation control layer 3 has a seed layer 6 and an intermediate layer 7. The seed layer 6 is made of a Cu—Ti alloy that has a face-centered cubic structure and includes Cu as a main component. The Cu—Ti alloy has a (111) crystal plane oriented substantially perpendicular to the surface of the non-magnetic substrate 1 and has a pseudo-hexagonal structure.
摘要翻译： 本发明提供一种磁记录介质，其能够在记录期间保持写入性能并且获得具有均匀直径的垂直取向和精细磁性结晶颗粒的改善的同时改善垂直磁记录层的垂直取向，并且其中 能够以高密度记录或再现信息，其制造方法和磁记录/再现装置。 根据本发明的磁记录介质10至少包括形成在非磁性基板1上的软磁性底层2，取向控制层3，磁记录层4和保护层5.取向控制层3 具有种子层6和中间层7.种子层6由具有面心立方结构并且包括Cu作为主要成分的Cu-Ti合金制成。 Cu-Ti合金具有大致垂直于非磁性基板1的表面定向的（111）晶面，并且具有假六边形结构。
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