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1. 发明专利

DE69417616D1 未知
公开(公告)号：DE69417616D1
公开(公告)日：1999-05-12
申请号：DE69417616
申请日：1994-01-31
申请人： FUJITSU LTD
发明人： KOSHIKAWA TAKAO , OHTSUKA YOSHINORI , UEHARA YUJI , TODA JUNZO , MIZOSHITA YOSHIFUMI
IPC分类号： G11B5/31 , G11B5/39

2. 发明专利

DE19833275C2 未知
公开(公告)号：DE19833275C2
公开(公告)日：2001-09-13
申请号：DE19833275
申请日：1998-07-24
申请人： FUJITSU LTD
发明人： TAGAWA IKUYA , YAMADA KENICHIRO , UEHARA YUJI
IPC分类号： G11B5/012 , G11B5/31 , G11B5/39 , H01F10/32 , H01F10/00
摘要： A spin valve head comprises a spin valve film having at least a pinned magnetic layer, a nonmagnetic metal layer, and a free magnetic layaer. The spin valve head further comprises a hard magnetic layer for controlling magnetic domains of the free magnetic layer, and electrode elements for supplying a sense current to the spin valve film, wherein the hard magnetic layer and the free magnetic layer are positioned not to overlap an orthographic projection of the hard magnetic layer in a thickness direction of the spin valve film with an orthographic projection of the free magnetic layer in the thickness direction of the spin valve film. According to such configuration, a single magnetic domain structure which does not generate a reverse magnetic field region throughout the overall surface of the free magnetic layer can be obtained, so that the hysteresis phenomenon is not caused in the spin valve head output. Therefore, the output with no noise can be derived.

3. 发明专利

DE69417616T2 未知
公开(公告)号：DE69417616T2
公开(公告)日：1999-07-22
申请号：DE69417616
申请日：1994-01-31
申请人： FUJITSU LTD
发明人： KOSHIKAWA TAKAO , OHTSUKA YOSHINORI , UEHARA YUJI , TODA JUNZO , MIZOSHITA YOSHIFUMI
IPC分类号： G11B5/31 , G11B5/39

4. 发明专利

DE19833275A1 Spin valve head has non-overlapping hard magnetic and free magnetic layers 未知
公开(公告)号：DE19833275A1
公开(公告)日：1999-07-01
申请号：DE19833275
申请日：1998-07-24
申请人： FUJITSU LTD
发明人： TAGAWA IKUYA , YAMADA KENICHIRO , UEHARA YUJI
IPC分类号： G11B5/012 , G11B5/31 , G11B5/39 , H01F10/32 , G11B5/33 , H01F10/00
摘要： A spin valve head has hard magnetic and free magnetic layers positioned such that their orthogonal projections, in the thickness direction of the spin valve film, do not overlap. A spin valve head has: (a) a spin valve film with a pinned magnetic layer (4), a nonmagnetic metal layer (3) and a free magnetic layer (2); (b) a hard magnetic layer (6) for magnetic domain control of the free magnetic layer; and (c) electrode elements (7) for supplying a sensing current to the spin valve film. The hard magnetic layer and the free magnetic layer are positioned as described above. Independent claims are also included for the following: (i) similar spin valve heads which may include an antiferromagnetic layer (5) in the spin valve film and two magnetic screening films; and (ii) processes for producing the above spin valve heads.

5. 发明公开

EP2549396A4 METHOD FOR SIMULATING MAGNETIC MATERIAL, AND PROGRAM 审中-公开
公开(公告)号：EP2549396A4
公开(公告)日：2017-12-06
申请号：EP10847906
申请日：2010-03-18
申请人： FUJITSU LTD
发明人： UEHARA YUJI
IPC分类号： G06F17/50 , G01R33/14
CPC分类号： G01R33/1215 , G01R33/0064 , G06F17/5018 , G06F2217/16 , Y02T10/82
摘要： A method for simulating a magnetic material performed by a computer, comprising: a first step that repeatedly performs a first process and a second process until the change of magnetization and a static magnetic field converges, the first process being to calculate a distribution of the magnetization and an average magnetization in a magnetic material model of micromagnetics, and the second process being to assign the magnetic material model of the micromagnetics to each mesh included in another magnetic material model, calculate the static magnetic field of the another magnetic material model using the average magnetization calculated by the first process, and return the calculated static magnetic field to the calculation of the distribution of the magnetization; and a second step that generates a hysteresis loop of each mesh included in the another magnetic material model based on the average magnetization calculated by the first process and the static magnetic field calculated by the second process, and calculates a hysteresis loss of the another magnetic material model from an area of the generated hysteresis loop.

6. 发明专利

JP2013064617A Simulation program, simulation device, and simulation method for magnetic material 有权
标题翻译：仿真程序，仿真器件和磁性材料的仿真方法
公开(公告)号：JP2013064617A
公开(公告)日：2013-04-11
申请号：JP2011202398
申请日：2011-09-15
申请人： Fujitsu Ltd , 富士通株式会社
发明人： FURUYA ATSUSHI , UEHARA YUJI , OSHIMA KOKEI
IPC分类号： G01N27/72 , G01R33/12
CPC分类号： H01F41/0246 , G01R33/0064 , G06F17/5009 , G06F2217/16 , H01F1/36
摘要： PROBLEM TO BE SOLVED: To provide a high-accuracy simulation in consideration of the magnetic resonance phenomenon and the occurrence of eddy current of a magnetic material having high resistivity.SOLUTION: The first term in the right side is a magnetic field resulting from the magnetic energy in a mesh ci, the second term is an inertial term, and the third term is a friction term. The inertial term is a differential of the magnetization change rate, expressing that the magnetic field operates in a direction to keep a constant magnetization change rate. The friction term is proportional to the magnetization change rate, expressing the friction against the magnetization operates in a direction to block the magnetization change. An effective magnetic field [H] is obtained using the friction term and the inertial term, so that the amount of change Δ[M] from the magnetization [M] at a time (τ-Δτ) to the magnetization [M] at a time τ in the mesh ci can be obtained in consideration of the friction and inertia for the magnetization [M] at the time (τ-Δτ) and the magnetization [M] at the time τ.
摘要翻译：要解决的问题：考虑到具有高电阻率的磁性材料的磁共振现象和涡电流的发生，提供高精度的模拟。解决方案：右侧的第一项是由网格ci中的磁能产生的磁场，第二项是惯性项，第三项是摩擦项。惯性项是磁化变化率的差值，表示磁场在保持恒定磁化变化率的方向上工作。摩擦项与磁化变化率成比例，表示对磁化的摩擦在阻止磁化变化的方向上起作用。使用摩擦项和惯性项获得有效磁场[H i ]，使得变化量Δ[M i < / SB>]从一个时间（τ-Δτ）到磁化[M i ]的磁化[M i ] 考虑到时间（τ-Δτ）和磁化[M]时的磁化摩擦和惯性[M i ]，网格ci中的时间τ可以获得 i ]。版权所有（C）2013，JPO＆INPIT

7. 发明专利

JP2009164268A Exchange-coupled element and magnetoresistance effect element 审中-公开
标题翻译：交换耦合元件和磁阻效应元件
公开(公告)号：JP2009164268A
公开(公告)日：2009-07-23
申请号：JP2007340637
申请日：2007-12-28
申请人： Fujitsu Ltd , Tohoku Univ , 国立大学法人東北大学 , 富士通株式会社
发明人： TAKAHASHI KEN , TSUNODA MASAKIYO , KOMAGAKI KOJIRO , UEHARA YUJI
IPC分类号： H01L43/08 , G11B5/39 , H01F10/16 , H01F10/32
CPC分类号： H01L43/08 , B82Y25/00 , G01R33/093 , G11B5/3906 , H01F10/3254 , H01F10/3272 , H01F10/3295
摘要： PROBLEM TO BE SOLVED: To provide an exchange-coupled element which has greater unidirectional magnetization anisotropy in comparison with conventional exchange-coupled elements, a magnetoresistance effect element using the exchange-coupled element, and a magnetic storage device. SOLUTION: The exchange-coupled element comprises: an ordered antiferromagnetic layer 12; and a pinned magnetic layer 13 being exchange-coupled with the ordered antiferromagnetic layer 12, the pinned magnetic layer 13 having unidirectional magnetization anisotropy. The pinned magnetic layer 13 is constituted by a first pinned magnetic layer 13a having a composition, which can have a face-centered cubic lattice structure, and a second pinned magnetic layer 13b having a composition, which can have a body-centered cubic lattice structure. Then, L12 type ordered alloy Mn3Ir is usable for the ordered antiferromagnetic layer 12, Co x Fe 1-x (x=1 to 0.7) is used for the first pinned magnetic layer 13a, and CoFe having the body-centered cubic lattice structure is used for the second pinned magnetic layer 13b. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供与传统的交换耦合元件相比具有更大的单向磁化各向异性的交换耦合元件，使用交换耦合元件的磁阻效应元件和磁存储器件。解决方案：交换耦合元件包括：有序反铁磁层12; 以及与有序反铁磁层12交换耦合的钉扎磁性层13，具有单向磁化各向异性的钉扎磁性层13。钉扎磁性层13由具有面心立方晶格结构的组成的第一被钉扎磁性层13a和具有组成的第二固定磁性层13b构成，其可以具有体心立方晶格结构。然后，L12型有序合金Mn3Ir可用于有序反铁磁性层12，对于第一固定磁体，使用Co x SB x（x = 1〜0.7）层13a和具有体心立方晶格结构的CoFe用于第二固定磁性层13b。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JP2003263706A MAGNETIC HEAD 审中-公开
公开(公告)号：JP2003263706A
公开(公告)日：2003-09-19
申请号：JP2003032130
申请日：2003-02-10
申请人： FUJITSU LTD
发明人： OTSUKA YOSHINORI , TAGAWA IKUYA , IKEGAWA YUKINORI , KUTSUZAWA TOMOKO , UEHARA YUJI , HASEGAWA MINORU
IPC分类号： G11B5/31
摘要： PROBLEM TO BE SOLVED: To increase magnetic field intensity by shaping a magnetic pole for a magnetic head. SOLUTION: In a composite magnetic head on which a reproducing head and a recording head are mounted, the recording head has a lower magnetic pole, a recording gap layer, a nonmagnetic insulating layer in which a recording coil is embedded, and an upper magnetic pole, the upper magnetic pole is trimmed to be shaped and, for the upper magnetic pole, a step height Dh from a position in which a step is formed by the trimming, to a floating surface is equal to or lower than 5.0 μm. COPYRIGHT: (C)2003,JPO

9. 发明专利

JP2003229310A SOFT MAGNETIC FILM AND THIN-FILM MAGNETIC HEAD 审中-公开
公开(公告)号：JP2003229310A
公开(公告)日：2003-08-15
申请号：JP2002026404
申请日：2002-02-04
申请人： FUJITSU LTD
发明人： IKEDA SHOJI , KUBOMIYA ATSUYUKI , TAGAWA IKUYA , UEHARA YUJI
IPC分类号： G11B5/31 , G11B5/39 , H01F10/16 , H01F10/26
摘要： PROBLEM TO BE SOLVED: To provide a soft magnetic film which can considerably contribute to the enhancement of a write magnetic field by a thin-film magnetic head. SOLUTION: The thin-film magnet head 32 has a lower magnetic pole 34. A nonmagnetic layer 37 is laminated on the lower magnetic pole 34. A NiFe alloy nonmagnetic base layer 38 is laminated on the nonmagnetic layer 37. An FeCo alloy ferromagnetic layer 35a is formed on the nonmagnetic base layer 38. When the FeCo alloy ferromagnetic layer 35a is laminated, the ferromagnetic layer 35a is provided with uniaxial magnetic anisotropy as well as soft magnetism. The ferromagnetic layer 35a has a high saturation magnetic flux density. A soft magnetic film having a high saturation magnetic flux density is arranged at the end of an upper magnet pole 35. COPYRIGHT: (C)2003,JPO

10. 发明专利

JPH06139524A MAGNETO-RESISTANCE EFFECT TYPE HEAD AND ITS PRODUCTION 失效
公开(公告)号：JPH06139524A
公开(公告)日：1994-05-20
申请号：JP28984492
申请日：1992-10-28
申请人： FUJITSU LTD
发明人： KANAMINE MASAAKI , KANE JIYUNICHI , AOYAMA SUSUMU , KANDA HIDEKAZU , IKEGAWA YUKINORI , UEHARA YUJI
IPC分类号： G11B5/31 , G11B5/39
摘要： PURPOSE:To enable stable reading of signals by sufficiently narrowing the areas of the parts of magnetic shielding layers exposed on the floating surfaces of the magneto-resistance effect type head facing a magnetic recording medium than the cross sectional areas of the parts of the magnetic shielding layers parted from the floating surfaces. CONSTITUTION:This magneto-resistance effect type head 1 is constituted by sufficiently narrowing the areas of the parts of the magnetic shielding layers 1d, 1d' exposed on the floating surfaces of the magneto-resistance effect type head facing the magnetic recording medium 2 than the cross sectional areas of the parts of the magnetic shielding layers 1d, 1d' parted from the floating surfaces. The extension of the materials, such as magnetic shielding layers 1d, 1d' exposed on the floating surfaces of the head and lead conductors 1b, in the moving direction of the magnetic recording medium 2 is thereby substantially prevented even if the floating surface of the head 1 comes into contact with the magnetic recording medium 2. The contact of the magnetic shielding layers 1d, 1d' and the lead conductors 1b is thus eliminated and the flow of the sense current through the magnetic shielding layers 1d, 1d' is prevented. The stable reading output of the signals is thus obtd.

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