公开(公告)号：US20120044595A1

公开(公告)日：2012-02-23

申请号：US12861725

申请日：2010-08-23

申请人： Yotsuo Yahisa ,  Ichiro Tamai ,  Akemi Hirotsune

发明人： Yotsuo Yahisa ,  Ichiro Tamai ,  Akemi Hirotsune

IPC分类号： G11B21/02 ,  G11B5/66

CPC分类号： G11B5/7325

摘要： In one embodiment, a perpendicular magnetic recording medium (PMRM) includes a first interlayer comprising Ru or a Ru alloy, a second interlayer above the first interlayer comprising Ru or a Ru alloy, and a third interlayer formed between the first interlayer and the second interlayer that reduces an average cluster size of the second interlayer. In another embodiment, a PMRM includes a first interlayer comprising Ru or a Ru alloy, a second interlayer above the first interlayer comprising Ru or a Ru alloy, and a third interlayer formed between the first interlayer and the second interlayer that reduces an average cluster size of the second interlayer. The third interlayer has a thickness of between about 1.0 nm and about 3.0 nm and has a structure selected from a group consisting of: BCC, B2, C11b, L21, and D03. Other PMRMs and methods of fabrication are presented as well.

摘要翻译： 在一个实施方案中，垂直磁记录介质（PMRM）包括包含Ru或Ru合金的第一中间层，包含Ru或Ru合金的第一中间层上的第二中间层，以及在第一中间层和第二中间层之间形成的第三中间层 这降低了第二夹层的平均簇尺寸。 在另一个实施方案中，PMRM包括包含Ru或Ru合金的第一中间层，包含Ru或Ru合金的第一中间层上的第二中间层，以及形成在第一中间层和第二中间层之间的第三中间层，其降低平均簇尺寸 的第二中间层。 第三中间层的厚度为约1.0nm至约3.0nm，并且具有选自由BCC，B2，C11b，L21和D03组成的组的结构。 还提出了其他PMRM和制造方法。

公开(公告)号：US07267894B2

公开(公告)日：2007-09-11

申请号：US10656746

申请日：2003-09-04

申请人： Tetsuya Kanbe ,  Tatsuya Hinoue ,  Yotsuo Yahisa ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki

发明人： Tetsuya Kanbe ,  Tatsuya Hinoue ,  Yotsuo Yahisa ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki

IPC分类号： G11B5/66 ,  G11B5/70

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66

摘要： A magnetic recording apparatus including a drive unit to drive the magnetic recording medium, a compound-type magnetic head, a means to move the magnetic head relative to the magnetic recording medium, and a means to process recording and retrieving signals generated by the magnetic head. The magnetic recording medium comprises a non-magnetic substrate and a magnetic layer formed thereon with three underlayers interposed inbetween. The magnetic layer is composed of a plurality of layers of Co-based alloy of hexagonal close-packed structure which are antiferromagnetically coupled to one another through a non-magnetic intermediate layer, said three underlayers including an amorphous alloy layer, a Ta layer, and a Cr-based alloy layer of body-centered cubic structure.

摘要翻译： 一种磁记录装置，包括驱动磁记录介质的驱动单元，复合型磁头，磁头相对于磁记录介质移动的装置，以及处理由磁头产生的信号的记录和检索装置 。 磁记录介质包括非磁性基底和形成在其上的三层底层之间的磁性层。 磁性层由多层通过非磁性中间层反铁磁耦合的六方密堆积结构的Co基合金层构成，所述三个底层包括非晶合金层，Ta层和 体心立方结构的Cr基合金层。

公开(公告)号：US20050164037A1

公开(公告)日：2005-07-28

申请号：US11072042

申请日：2005-03-03

申请人： Tetsuya Kanbe ,  Yotsuo Yahisa ,  Hiroyuki Suzuki ,  Hidekazu Kashiwase

发明人： Tetsuya Kanbe ,  Yotsuo Yahisa ,  Hiroyuki Suzuki ,  Hidekazu Kashiwase

IPC分类号： G11B5/738 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73

CPC分类号： G11B5/7325 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/265

摘要： An inplane magnetic recording medium having high S/N and thermal stability and a reliable magnetic storage device having surface recording density of 50 megabit/mm2 or more is described. The magnetic recording medium includes magnetic layers formed on a nonmagnetic substrate with a plurality of ground layers therebetween, at least one of the ground layers formed from an alloy of a body-centered cubic structure containing Cr as a main component and B of from 2 atomic % to 12 atomic %. Main components of the magnetic layers include a lower magnetic layer containing Co and Cr of from 10 atomic % to 16 atomic %, with film thickness of from 1.5 nm to 4.5 nm, and an upper magnetic layer containing Co, coupling anti-ferromagnetically with the lower magnetic layer through nonmagnetic intermediate layers.

摘要翻译： 描述了具有高S / N和热稳定性的内置磁记录介质和具有50兆比特/平方毫米或更高的表面记录密度的可靠的磁存储装置。 磁记录介质包括形成在非磁性基底上的磁性层，其间具有多个接地层，至少一个接地层由以Cr为主要成分的体心立方结构的合金形成，B为2原子 ％至12原子％。 磁性层的主要成分包括含有10〜16原子％的Co和Cr的下部磁性层，膜厚度为1.5nm〜4.5nm，以及含有Co的上部磁性层，反铁磁共振 通过非磁性中间层降低磁性层。

公开(公告)号：US20050138796A1

公开(公告)日：2005-06-30

申请号：US11062652

申请日：2005-02-23

申请人： Yoshio Takahashi ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama

发明人： Yoshio Takahashi ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama

IPC分类号： G11B5/65 ,  G11B5/64 ,  G11B5/667 ,  G11B5/73 ,  G11B5/738 ,  G11B5/84 ,  B05D5/12 ,  G11B5/127

CPC分类号： G11B5/732 ,  G11B5/65 ,  G11B5/667 ,  G11B5/7325 ,  G11B5/8404 ,  Y10T29/49021 ,  Y10T29/49025 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49078 ,  Y10T29/49224 ,  Y10T428/12465 ,  Y10T428/12757 ,  Y10T428/24355 ,  Y10T428/31

摘要： Disclosed is a magnetic recording medium and a method for manufacturing the same to provide a magnetic recording medium reducing medium noise and having excellent thermal stability. The magnetic recording medium includes a substantially amorphous seed layer and a polycrystal underlayer made of crystal grains having a substantially columnar structure, the polycrystal underlayer contacting thereto. In a boundary between the seed layer and the underlayer, fine grooves having a period up to as large as the magnetic layer crystal grain diameter are formed in the disc circumferential direction. Accordingly, the magnetic recording medium is allowed to have a grain shape with a value obtained by dividing the average grain diameter for the disc circumferential direction by the average grain diameter for the disc radial direction of no less than 0.5 and no more than 0.9, thus achieving simultaneously reduction of the medium noise and thermal stability.

摘要翻译： 公开了一种磁记录介质及其制造方法，以提供磁记录介质降低介质噪声并具有优异的热稳定性。 磁记录介质包括基本上无定形的种子层和由具有基本上柱状结构的晶粒制成的多晶底层，多晶底层与其接触。 在种子层和底层之间的边界处，在盘周向形成有具有与磁性层晶粒直径一样大的周期的细槽。 因此，使磁记录介质具有通过将盘圆周方向的平均粒径除以盘径向的平均粒径为不小于0.5且不大于0.9而获得的值的晶粒形状，因此 实现中等噪声和热稳定性的同时降低。

公开(公告)号：US06830837B2

公开(公告)日：2004-12-14

申请号：US10046987

申请日：2002-01-17

申请人： Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama ,  Hidekazu Kashiwase

发明人： Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama ,  Hidekazu Kashiwase

IPC分类号： G11B566

CPC分类号： G11B5/7325 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/1121 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/12861

摘要： It is an object of the present invention to provide a high reliability magnetic storage apparatus capable of performing writing and reading back of high density information. The magnetic storage apparatus is so configured as to have a longitudinal magnetic recording medium including: a magnetic layer formed on a non-magnetic substrate via a plurality of underlayers; the magnetic layer including a lower magnetic layer containing Ru in an amount of not less than 3 at % to not more than 30 at %, and Cr in an amount of not less than 0 at % to not more than 18 at %, and further containing at least one of B or C in an amount of not less than 0 at % to not more than 20 at %, and an upper magnetic layer containing Co as a main component disposed thereon via a non-magnetic intermediate layer.

摘要翻译： 本发明的目的是提供一种能够执行高密度信息的写入和读回的高可靠性磁存储装置。 磁存储装置被配置为具有纵向磁记录介质，其包括：通过多个底层在非磁性基板上形成的磁性层; 所述磁性层包括含有不小于3原子％至不超过30原子％的量的Ru的下磁性层，并且不少于0原子％至不大于18原子％的Cr， 含有不小于0at％至不超过20at％的B或C中的至少一个，以及经由非磁性中间层设置在其上的Co作为主要成分的上磁性层。

公开(公告)号：US06756113B2

公开(公告)日：2004-06-29

申请号：US10077880

申请日：2002-02-20

申请人： Yoshibumi Matsuda ,  Koji Sakamoto ,  Tetsuya Kanbe ,  Yotsuo Yahisa

发明人： Yoshibumi Matsuda ,  Koji Sakamoto ,  Tetsuya Kanbe ,  Yotsuo Yahisa

IPC分类号： G11B566

CPC分类号： G11B5/7325 ,  G11B5/66 ,  G11B5/84 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/265

摘要： A magnetic recording medium includes a first underlying film of a NiTa alloy having a nonmagnetic amorphous structure and formed on a nonmagnetic substrate, and a second underlying film made of an alloy containing Cr and Ti, further a first magnetic film of a CoCrPt alloy, a nonmagnetic intermediate film of Ru and a second magnetic film of a CoCrPtB alloy that are serially formed over the first underlying film, wherein oxygen locally exists in an interface between the first underlying film and the second underlying film.

摘要翻译： 磁记录介质包括具有非磁性无定形结构并形成在非磁性基底上的NiTa合金的第一底膜，以及由含有Cr和Ti的合金制成的第二底膜，另外还有CoCrPt合金的第一磁性膜， Ru的非磁性中间膜和CoCrPtB合金的第二磁性膜，其顺序地形成在第一底层膜上，其中氧局部存在于第一底层膜和第二底膜之间的界面中。

公开(公告)号：US5906884A

公开(公告)日：1999-05-25

申请号：US518391

申请日：1995-08-15

申请人： Yotsuo Yahisa ,  Yoshibumi Matsuda ,  Joe Inagaki ,  Enji Fujita ,  Takao Yonekawa ,  Mitsuhiro Shoda ,  Akira Kato ,  Yuzuru Hosoe ,  Masukazu Igarashi

发明人： Yotsuo Yahisa ,  Yoshibumi Matsuda ,  Joe Inagaki ,  Enji Fujita ,  Takao Yonekawa ,  Mitsuhiro Shoda ,  Akira Kato ,  Yuzuru Hosoe ,  Masukazu Igarashi

IPC分类号： G11B5/66 ,  G11B5/65 ,  G11B5/73 ,  G11B5/82 ,  G11B33/08

CPC分类号： G11B5/7315 ,  G11B5/7325 ,  G11B5/82 ,  G11B33/08 ,  Y10S428/90

摘要： A magnetic recording medium has a substrate made of a nonmetal nonmagnetic material whose coefficient of linear expansion lies within a range from 0.000013/deg to 0.0001/deg. A magnetic layer is formed on the substrate as a thin polycrystalline film or a thin amorphous film. The magnetic layer has Co as a main component, which exhibits a negative magnetostrictive constant so that its coercive force rises in the direction of compressive strain. The magnetic layer is subjected to an in-plane compressive strain from the substrate due to a difference between the coefficient of thermal expansion of the substrate and the magnetic layer so that high coercivity is obtained in the magnetic layer.

摘要翻译： 磁记录介质具有由非金属非磁性材料制成的基板，其线性膨胀系数在0.000013 / deg至0.0001 / deg的范围内。 作为薄多晶膜或薄的无定形膜，在基板上形成磁性层。 磁性层具有Co作为主要成分，其表现出负的磁致伸缩常数，使其矫顽力沿压缩应变的方向上升。 由于衬底的热膨胀系数与磁性层之间的差异，磁性层受到来自衬底的面内压缩应变，从而在磁性层中获得高的矫顽力。