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1.发明申请公开(公告)号：US20050136291A1
公开(公告)日：2005-06-23
申请号：US10975936
申请日：2004-10-28
Applicant: Iwao Okamoto , Hisashi Umeda
Inventor： Iwao Okamoto , Hisashi Umeda
Abstract: A magnetic recording medium is provided with first and second ferromagnetic layers which are exchange-coupled via a first nonmagnetic coupling layer and have mutually parallel magnetizations. The second ferromagnetic layer and a magnetic layer are exchange-coupled via a second nonmagnetic coupling layer and have magnetizations which are mutually antiparallel. The first and second ferromagnetic layers and the magnetic layer respectively have dynamic coercivities Hc1′, Hc2′ and Hc3′ which satisfy a relationship Hc1′
Abstract translation: 磁记录介质设置有第一和第二铁磁层，其经由第一非磁性耦合层交换耦合并且具有相互平行的磁化。 第二铁磁层和磁性层通过第二非磁性耦合层进行交换耦合，并具有相互反平行的磁化。 第一和第二铁磁层和磁性层分别具有在记录磁场的切换时间区域中满足关系Hc 1'
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公开(公告)号：US06645646B1
公开(公告)日：2003-11-11
申请号：US09587842
申请日：2000-06-06
Applicant: Hisashi Umeda , E. Noel Abarra , Iwao Okamoto , Yoshifumi Mizoshita
Inventor： Hisashi Umeda , E. Noel Abarra , Iwao Okamoto , Yoshifumi Mizoshita
IPC: G11B566
CPC classification number: G11B5/66 , G11B5/74 , G11B5/82 , G11B2005/0002 , Y10S428/90 , Y10T428/12465 , Y10T428/12861 , Y10T428/2495 , Y10T428/265
Abstract: A magnetic recording medium is constructed to include at least one exchange layer structure and a magnetic layer provided on the exchange layer structure, where the exchange layer structure includes a ferromagnetic layer and a non-magnetic coupling layer provided on the ferromagnetic layer, and a magnetic bonding layer provided between the ferromagnetic layer and the non-magnetic coupling layer and/or between the non-magnetic coupling layer and the magnetic layer, wherein the magnetic bonding layer has a magnetization direction parallel to the ferromagnetic layer and the magnetic layer.
Abstract translation: 磁记录介质被构造成包括至少一个交换层结构和设置在交换层结构上的磁性层，其中交换层结构包括强磁性层和设置在铁磁层上的非磁性耦合层，以及磁性层 粘结层设置在铁磁层和非磁性耦合层之间和/或非磁性耦合层与磁性层之间，其中磁性结合层具有平行于铁磁性层和磁性层的磁化方向。
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3.发明申请公开(公告)号：US20050053803A1
公开(公告)日：2005-03-10
申请号：US10850988
申请日：2004-05-21
Applicant: Hisashi Umeda , Iwao Okamoto
Inventor： Hisashi Umeda , Iwao Okamoto
CPC classification number: G11B5/66 , G11B5/09 , Y10T428/12882 , Y10T428/12937 , Y10T428/265
Abstract: A magnetic recording medium is provided with a first magnetic layer, a nonmagnetic coupling layer provided on the first magnetic layer, and a second magnetic layer provided on the nonmagnetic coupling layer. The first and second magnetic layers are exchange-coupled, and have magnetization directions which are mutually parallel in a state where no external magnetic field is applied thereto, and the first magnetic layer switches the magnetization direction thereof before the second magnetic layer in response to a recording magnetic field which switches the magnetization directions of the first and second magnetic layers.
Abstract translation: 磁记录介质设置有第一磁性层，设置在第一磁性层上的非磁性耦合层和设置在非磁性耦合层上的第二磁性层。 第一和第二磁性层是交换耦合的，并且在不施加外部磁场的状态下具有相互平行的磁化方向，并且第一磁性层响应于第二磁性层在第二磁性层之前切换其磁化方向 记录切换第一和第二磁性层的磁化方向的磁场。
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4.发明授权Magnetic recording medium, method of producing magnetic recording medium, and magnetic storage apparatus 失效磁记录介质，磁记录介质的制造方法以及磁存储装置公开(公告)号：US06689496B1
公开(公告)日：2004-02-10
申请号：US09716386
申请日：2000-11-20
Applicant: Haruhiro Komura , Yuki Yoshida , Hisashi Umeda , Iwao Okamoto
Inventor： Haruhiro Komura , Yuki Yoshida , Hisashi Umeda , Iwao Okamoto
IPC: G11B566
CPC classification number: G11B5/732 , G11B5/656 , G11B5/7325 , G11B5/84 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/12931 , Y10T428/24942 , Y10T428/265
Abstract: A magnetic recording medium includes a substrate, a nonmagnetic seed layer provided on the substrate, and a magnetic layer provided on the nonmagnetic seed layer via one or a plurality of layers. The nonmagnetic seed layer is made of NiAl having an oxygen concentration of approximately 1500 to 4000 ppm.
Abstract translation: 磁记录介质包括基板，设置在基板上的非磁性种子层，以及经由一个或多个层设置在非磁性种子层上的磁性层。 非磁性种子层由氧浓度为约1500〜4000ppm的NiAl制成。
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5.发明授权公开(公告)号：US07625643B2
公开(公告)日：2009-12-01
申请号：US11893253
申请日：2007-08-14
Applicant: Hisashi Umeda , Iwao Okamoto
Inventor： Hisashi Umeda , Iwao Okamoto
CPC classification number: G11B5/66 , G11B5/09 , Y10T428/12882 , Y10T428/12937 , Y10T428/265
Abstract: A magnetic recording medium is provided with a first magnetic layer, a nonmagnetic coupling layer provided on the first magnetic layer, and a second magnetic layer provided on the nonmagnetic coupling layer. The first and second magnetic layers are exchange-coupled, and have magnetization directions which are mutually parallel in a state where no external magnetic field is applied thereto, and the first magnetic layer switches the magnetization direction thereof before the second magnetic layer in response to a recording magnetic field which switches the magnetization directions of the first and second magnetic layers.
Abstract translation: 磁记录介质设置有第一磁性层，设置在第一磁性层上的非磁性耦合层和设置在非磁性耦合层上的第二磁性层。 第一和第二磁性层是交换耦合的，并且在不施加外部磁场的状态下具有相互平行的磁化方向，并且第一磁性层响应于第二磁性层在第二磁性层之前切换其磁化方向 记录切换第一和第二磁性层的磁化方向的磁场。
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Patent Agency Ranking
6.发明授权公开(公告)号：US07435489B2
公开(公告)日：2008-10-14
申请号：US10798102
申请日：2004-03-11
Applicant: Hisashi Umeda , Iwao Okamoto
Inventor： Hisashi Umeda , Iwao Okamoto
IPC: G11B5/66
CPC classification number: G11B5/656 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/09 , G11B5/66 , G11B5/82 , G11B2005/001 , Y10T428/265
Abstract: A magnetic recording medium is provided with an exchange layer structure, and a magnetic layer provided on the exchange layer structure. The exchange layer structure includes a ferromagnetic layer and a nonmagnetic coupling layer provided on the ferromagnetic layer, where the ferromagnetic layer and the magnetic layer are exchange-coupled and having mutually antiparallel magnetizations. The ferromagnetic layer and the magnetic layer satisfy a relationship Hc1′≧Hc2′, where Hc1′ denotes a dynamic coercivity of the ferromagnetic layer and Hc2′ denotes a dynamic coercivity of the magnetic layer.
Abstract translation: 磁记录介质具有交换层结构，以及设置在交换层结构上的磁性层。 交换层结构包括铁磁层和设置在铁磁层上的非磁耦合层，其中铁磁层和磁层交换耦合并具有相互反平行的磁化。 铁磁层和磁性层满足Hc 1'> = Hc 2'的关系，其中Hc 1'表示铁磁层的动态矫顽力，Hc 2'表示磁性层的动态矫顽力。
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7.发明申请公开(公告)号：US20080002296A1
公开(公告)日：2008-01-03
申请号：US11893253
申请日：2007-08-14
Applicant: Hisashi Umeda , Iwao Okamoto
Inventor： Hisashi Umeda , Iwao Okamoto
CPC classification number: G11B5/66 , G11B5/09 , Y10T428/12882 , Y10T428/12937 , Y10T428/265
Abstract: A magnetic recording medium is provided with a first magnetic layer, a nonmagnetic coupling layer provided on the first magnetic layer, and a second magnetic layer provided on the nonmagnetic coupling layer. The first and second magnetic layers are exchange-coupled, and have magnetization directions which are mutually parallel in a state where no external magnetic field is applied thereto, and the first magnetic layer switches the magnetization direction thereof before the second magnetic layer in response to a recording magnetic field which switches the magnetization directions of the first and second magnetic layers.
Abstract translation: 磁记录介质设置有第一磁性层，设置在第一磁性层上的非磁性耦合层和设置在非磁性耦合层上的第二磁性层。 第一和第二磁性层是交换耦合的，并且在不施加外部磁场的状态下具有相互平行的磁化方向，并且第一磁性层响应于第二磁性层在第二磁性层之前切换其磁化方向 记录切换第一和第二磁性层的磁化方向的磁场。
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8.发明授权Magnetic recording medium having at least two coupled magnetic layers, magnetic storage apparatus and recording method 失效具有至少两个耦合磁性层的磁记录介质，磁存储装置和记录方法公开(公告)号：US07271984B2
公开(公告)日：2007-09-18
申请号：US10850988
申请日：2004-05-21
Applicant: Hisashi Umeda , Iwao Okamoto
Inventor： Hisashi Umeda , Iwao Okamoto
CPC classification number: G11B5/66 , G11B5/09 , Y10T428/12882 , Y10T428/12937 , Y10T428/265
Abstract: A magnetic recording medium is provided with a first magnetic layer, a nonmagnetic coupling layer provided on the first magnetic layer, and a second magnetic layer provided on the nonmagnetic coupling layer. The first and second magnetic layers are exchange-coupled, and have magnetization directions which are mutually parallel in a state where no external magnetic field is applied thereto, and the first magnetic layer switches the magnetization direction thereof before the second magnetic layer in response to a recording magnetic field which switches the magnetization directions of the first and second magnetic layers.
Abstract translation: 磁记录介质设置有第一磁性层，设置在第一磁性层上的非磁性耦合层和设置在非磁性耦合层上的第二磁性层。 第一和第二磁性层是交换耦合的，并且在不施加外部磁场的状态下具有相互平行的磁化方向，并且第一磁性层响应于第二磁性层在第二磁性层之前切换其磁化方向 记录切换第一和第二磁性层的磁化方向的磁场。
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9.发明申请公开(公告)号：US20050014028A1
公开(公告)日：2005-01-20
申请号：US10798102
申请日：2004-03-11
Applicant: Hisashi Umeda , Iwao Okamoto
Inventor： Hisashi Umeda , Iwao Okamoto
IPC: G11B5/00 , G11B5/012 , G11B5/02 , G11B5/09 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/738 , G11B5/82 , H01F10/16 , H01F10/32 , G11B5/72
CPC classification number: G11B5/656 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/09 , G11B5/66 , G11B5/82 , G11B2005/001 , Y10T428/265
Abstract: A magnetic recording medium is provided with an exchange layer structure, and a magnetic layer provided on the exchange layer structure. The exchange layer structure includes a ferromagnetic layer and a nonmagnetic coupling layer provided on the ferromagnetic layer, where the ferromagnetic layer and the magnetic layer are exchange-coupled and having mutually antiparallel magnetizations. The ferromagnetic layer and the magnetic layer satisfy a relationship Hc1′≧Hc2′, where Hc1′ denotes a dynamic coercivity of the ferromagnetic layer and Hc2′ denotes a dynamic coercivity of the magnetic layer.
Abstract translation: 磁记录介质具有交换层结构，以及设置在交换层结构上的磁性层。 交换层结构包括铁磁层和设置在铁磁层上的非磁耦合层，其中铁磁层和磁层交换耦合并具有相互反平行的磁化。 铁磁层和磁性层满足Hc1'> = Hc2'的关系，其中Hc1'表示铁磁层的动态矫顽力，Hc2'表示磁性层的动态矫顽力。
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10.发明授权Magnetic recording medium, magnetic storage apparatus, recording method and method of producing magnetic recording medium 失效磁记录介质，磁存储装置，制造磁记录介质的记录方法和方法公开(公告)号：US06753101B1
公开(公告)日：2004-06-22
申请号：US09588850
申请日：2000-06-06
Applicant: E. Noel Abarra , Iwao Okamoto , Yoshifumi Mizoshita , Yuki Yoshida
Inventor： E. Noel Abarra , Iwao Okamoto , Yoshifumi Mizoshita , Yuki Yoshida
IPC: G11B566
CPC classification number: G11B5/66 , G11B5/74 , G11B5/82 , G11B2005/0002 , Y10S428/90 , Y10T428/24942 , Y10T428/265
Abstract: A magnetic recording medium is provided with at least one exchange layer structure, and a magnetic layer formed on the exchange layer structure. The exchange layer structure includes a ferromagnetic layer and a non-magnetic coupling layer provided on the ferromagnetic layer and under the magnetic layer.
Abstract translation: 磁记录介质具有至少一个交换层结构和形成在交换层结构上的磁性层。 交换层结构包括铁磁层和设置在铁磁层上和磁层下面的非磁性耦合层。
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