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1. 发明专利

JP2005004901A Magnetic head and magnetic recording method 有权
标题翻译：磁头和磁记录方法
公开(公告)号：JP2005004901A
公开(公告)日：2005-01-06
申请号：JP2003168371
申请日：2003-06-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKAGI FUMIKO , IGARASHI KAZUSUKATSU , MATSUMOTO TAKUYA , SAGA HIDEKI , ISHIKAWA HIROSHI , MOCHIZUKI MASABUMI , NAKAMURA ATSUSHI
IPC分类号： G11B5/02
CPC分类号： G11B2005/0021
摘要： PROBLEM TO BE SOLVED: To realize ultra-high density thermally assisted magnetic recording by generating near-field light in and at an optimum light irradiation position and light irradiation timing.
SOLUTION: The position to be provided with a light irradiation means is confined within a distance half the magnetic pole width in the track width direction of a main magnetic pole from a trailing side terminal 101 of the main magnetic pole 100.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过在最佳光照射位置和光照射时间产生近场光来实现超高密度热辅助磁记录。解决方案：设置有光照射装置的位置被限制在主磁极100的后侧端子101的主磁极的磁道宽度方向上的磁极宽度的一半的距离内。
版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2012198951A Magnetic recording medium and heat-assisted magnetic recording device 审中-公开
标题翻译：磁记录介质和热辅助磁记录装置
公开(公告)号：JP2012198951A
公开(公告)日：2012-10-18
申请号：JP2011061220
申请日：2011-03-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKAGI FUMIKO , YASUI KAN
IPC分类号： G11B5/65 , G11B5/02 , G11B5/66
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium and a recording method for performing multilayer recording using a heat-assisted magnetic recording method.SOLUTION: The magnetic recording medium includes a plurality of recording layers 23 formed on a substrate 21 in a magnetically separated manner. Each recording layer includes a plurality of magnetic cells 28 that are magnetically mutually separated and, for a magnetic cell that is located closer to the substrate, a magnetic recording medium with higher Curie temperature is used. In recording, the heat-assisted magnetic recording device sequentially performs the recording from the recording layer close to the substrate.
摘要翻译：要解决的问题：提供一种使用热辅助磁记录方法进行多层记录的磁记录介质和记录方法。解决方案：磁记录介质包括以磁力分离的方式形成在基板21上的多个记录层23。每个记录层包括磁性相互分离的多个磁性单元28，并且对于位于更靠近基板的磁性单元，使用具有较高居里温度的磁记录介质。在记录中，热辅助磁记录装置从靠近基板的记录层依次执行记录。版权所有（C）2013，JPO＆INPIT

3. 发明专利

JP2007128573A Head for heat assisted recording device, and heat assisted recording device 有权
标题翻译：热辅助记录装置的头部和热辅助记录装置
公开(公告)号：JP2007128573A
公开(公告)日：2007-05-24
申请号：JP2005318511
申请日：2005-11-01
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MATSUMOTO TAKUYA , AKAGI FUMIKO
IPC分类号： G11B11/105 , G11B5/02 , G11B11/10
CPC分类号： G11B5/1272 , G11B5/02 , G11B5/3116 , G11B5/314 , G11B11/10536 , G11B2005/0002 , G11B2005/0021
摘要： PROBLEM TO BE SOLVED: To apply an intense magnetic field in an area, where near-field light is generated, in a head for heat assisted recording using a scattering body having conductivity as the near-field light generating element.
SOLUTION: In a bottom part of a slider, the scattering body 1 for generating the near-field light is formed and the magnetic field is applied there using a coil. In this process, in order to enhance the magnetic field intensity, a magnetic pole 2 comprising a soft-magnetic object is formed in an upper part of the scattering body 1.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：在使用具有导电性的散射体作为近场光产生元件的用于热辅助记录的头部中，在产生近场光的区域中施加强磁场。解决方案：在滑块的底部，形成用于产生近场光的散射体1，并且使用线圈在其上施加磁场。在该过程中，为了提高磁场强度，在散射体1的上部形成有包含软磁性物体的磁极2.（C）2007，JPO＆INPIT

4. 发明专利

JP2003303408A Magnetic recording medium 审中-公开
标题翻译：磁记录介质
公开(公告)号：JP2003303408A
公开(公告)日：2003-10-24
申请号：JP2002103331
申请日：2002-04-05
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKAGI FUMIKO , IGARASHI KAZUSUKATSU , HIRAYAMA YOSHIYUKI
IPC分类号： G11B5/66 , G11B5/65 , G11B5/738 , H01F10/16
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium wherein each ferromagnetic layer has antiferromagnetic coupling even when the ferromagnetic layer of an AFC medium becomes thick, noise is low, and the influence of thermal fluctuation is suppressed.
SOLUTION: This magnetic recording medium is provided with a magnetic recording layer formed through a foundation layer on a substrate. In this case, the magnetic recording layer has at least two ferromagnetic layers antiferromagnetically coupled with each other through a nonferromagnetic layer, and an antiferromagnetic layer is disposed below the magnetic recording layer closest to the foundation layer.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了提供一种磁记录介质，其中即使当AFC介质的铁磁层变厚时，每个铁磁层也具有反铁磁耦合，噪声低，并且抑制了热波动的影响。解决方案：该磁记录介质设置有通过基底上的基底层形成的磁记录层。在这种情况下，磁记录层具有通过非铁磁层彼此反铁磁耦合的至少两个铁磁层，并且反铁磁层设置在最靠近基底层的磁记录层的下方。版权所有（C）2004，JPO

5. 发明专利

JP2014086103A Magnetic recording medium and magnetic storage device 审中-公开
标题翻译：磁记录介质和磁存储器件
公开(公告)号：JP2014086103A
公开(公告)日：2014-05-12
申请号：JP2012233336
申请日：2012-10-23
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： USHIYAMA JUNKO , MIYAMOTO JIICHI , AKAGI FUMIKO
IPC分类号： G11B5/65 , G11B5/02
CPC分类号： G11B5/746 , G11B5/82 , G11B5/855
摘要： PROBLEM TO BE SOLVED: To provide a bit pattern medium (magnetic recording medium) for heat assistant magnetic recording, having steep temperature distribution and capable of recording without influencing an adjoining bit.SOLUTION: A magnetic recording medium includes a magnetic recording layer 4 formed on a substrate 1 and a substrate. The magnetic recording layer 4 includes a record section 6 in which magnetic material is formed as a bit pattern, and a packed bed 7 filled up with nonmagnetic material in periphery of the record section 6. Thermal conductivity of the nonmagnetic material is relatively higher than the magnetic material.
摘要翻译：要解决的问题：提供一种用于热辅助磁记录的位图形介质（磁记录介质），具有陡峭的温度分布并且能够在不影响相邻位的情况下记录。解决方案：磁记录介质包括形成在基板1和基板。磁记录层4包括记录部分6，其中磁性材料形成为位图形，填充层7填充有记录部分6周围的非磁性材料。非磁性材料的导热性相对高于磁性材料。

6. 发明专利

JP2010108571A Thermally assisted magnetic recording medium and magnetic recording apparatus 有权
标题翻译：热辅助磁记录介质和磁记录装置
公开(公告)号：JP2010108571A
公开(公告)日：2010-05-13
申请号：JP2008281576
申请日：2008-10-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKAGI FUMIKO , IGARASHI KAZUSUKATSU , NEMOTO HIROAKI , ICHIHARA TAKAYUKI
IPC分类号： G11B5/66 , G11B5/02 , G11B5/64 , G11B5/65 , G11B5/738
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/314 , G11B5/65 , G11B5/66 , G11B5/743 , G11B2005/0021
摘要： PROBLEM TO BE SOLVED: To provide a thermally assisted magnetic recording medium which can perform recording at low temperature without restricting an anisotropy field strength of a recording layer by a head field.
SOLUTION: The thermally assisted magnetic recording medium has the recording layer of at least two layers formed on a substrate, the recording layer is a soft magnetic layer, and magnetic particles configuring the soft magnetic layer have non-magnetic substance which magnetically divides the particles in a grain boundary. In a ratio (K
u1 v
1 )/(k
B T) between an energy (K
u1 v
1 ) (K
u1 is an anisotropy energy and v
1 is a volume of the particle) for maintaining recording magnetization of a first magnetic layer of the recording layer and an energy of thermal fluctuation (k
B T) (k
B is a Boltzmann constant and T is an absolute temperature), and a ratio (K
u2 v
2 )/(k
B T) between (K
u2 v
2 ) of a second magnetic layer and the energy of thermal fluctuation, (K
u1 v
1 )/(k
B T) is grater than (K
u2 v
2 )/(k
B T) at room temperature, and, near the Curie temperature of the first magnetic layer, conversely, (K
u2 v
2 )/(k
B T) is greater than (K
u1 v
1 )/(k
B T).
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够在低温下进行记录而不限制通过磁头场的记录层的各向异性场强的热辅助磁记录介质。解决方案：热辅助磁记录介质具有形成在基板上的至少两层的记录层，记录层是软磁性层，构成软磁层的磁性颗粒具有磁性分离的非磁性物质颗粒在晶界。在能量（K u1 V）之间的比例（K u1 v 1 ）/ ＆lt; SB＆gt; 1＆lt; SB＆gt;）（K＆lt; SB＆gt; u1＆lt; / SB＆gt;是各向异性能量，v＆lt; SB＆gt; 1＆lt; / SB＆gt;是粒子的体积），用于保持第一磁性层的记录磁化记录层和热波动能（k B T）（k SB> SB 是玻耳兹曼常数，T是绝对温度），比例（K 2 2 ）/（k B T）的第二磁性层和热波动的能量（K u1 v 1）/（k SB> B ）比（K 在室温下，在第一磁性层的居里温度附近，相反，（（S）（K B ）/（k B T）大于（K ）/（K 乙 T）。版权所有（C）2010，JPO＆INPIT

7. 发明专利

JPH06187611A MAGNETIC HEAD AND MAGNETIC RECORDER USING THE SAME 失效
公开(公告)号：JPH06187611A
公开(公告)日：1994-07-08
申请号：JP33578592
申请日：1992-12-16
申请人： HITACHI LTD
发明人： AKAGI FUMIKO , YOSHIDA KAZUYOSHI
IPC分类号： G11B5/23 , G11B5/31
摘要： PURPOSE:To improve the overwriting characteristic by setting the distance between the position of a recording medium that is coincident with the coercive force so that it is left and right asymmetrical between the 1st and 2nd magnetic poles and at the same time increasing the distance from the 1st magnetic pole compared with the distance from the 2nd magnetic pole. CONSTITUTION:A thin film magnetic head 1 is constituted of a 1st magnetic pole 1b set at the back in the traveling direction of a recording medium 3 and a 2nd magnetic pole 1a set at the front in the traveling direction of the medium 3, respectively. Both poles 1b and 1a are magnetically short-circuited to each other at the side opposite to the counter surface of the medium 3. Furthermore, the distance between the position having coercive coincident with that of the medium 3 and the gap center position of the head 1 is set so that the distance is left and right asymmetrical between both poles 1b and 1a. At the same time, the distance from the pole 1b is increased by 0.6mum compared with the distance from the pole 1a. Therefore, a recording current is set so that the pole 1b is excessively saturated and the pole 1a is unsaturated, respectively. Then, the overwriting characteristic is extremely improved.

8. 发明专利

JP2008052863A Thermally assisted magnetic recording apparatus 有权
标题翻译：热辅助磁记录装置
公开(公告)号：JP2008052863A
公开(公告)日：2008-03-06
申请号：JP2006230267
申请日：2006-08-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKAGI FUMIKO , MATSUMOTO TAKUYA , NAKAMURA KIMIO
IPC分类号： G11B5/02 , G11B11/10
CPC分类号： G11B5/1278 , G11B2005/001 , G11B2005/0021
摘要： PROBLEM TO BE SOLVED: To perform saturated recording with optimal magnetic field intensity in a thermally assisted magnetic recording apparatus using a granular medium.
SOLUTION: In the thermally assisted magnetic recording apparatus, when setting the optimal magnetic field intensity for performing saturated recording to be ≥560×10
3 A/m, a value made to be dimensionless by dividing the recording track width of a medium for information recording by 10
-9 m to be X and a magnetic field applied from a magnetic pole for applying a head magnetic field to the center of the thickness direction of the medium for information recording to be Y (the unit is A/m), the optimal magnetic recording intensity Y satisfies a formula (1): Y≥(X
2 -119×X+4,135)×1,000 and a formula (2): Y≤(X
2 -119×X+const)×1,000 in a condition that the width of a recording track is ≤60 nm. In the formula (2), when a relative speed (tangential speed) v between a head and the medium at the position of the head is 2 +33.7×v+4,250 is satisfied and when the tangential speed v is ≥20 m/sec, const=4,600 is satisfied.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：在使用粒状介质的热辅助磁记录装置中进行具有最佳磁场强度的饱和记录。解决方案：在热辅助磁记录装置中，当将用于进行饱和记录的最佳磁场强度设定为≥560×10 3 A / m时，通过划分成无量纲化的值用于将10 -9 m信息记录的介质的记录磁道宽度设为X，并从用于将磁头施加磁场的磁场施加到介质的厚度方向的中心为了信息记录为Y（单位为A / m），最佳磁记录强度Y满足公式（1）：Y≥（X 2 -119×X + 4,135）×1,000，在记录轨道的宽度≤60nm的条件下，公式（2）：Y≤（X 2 -119×X + const）×1,000。在公式（2）中，当头部和头部位置的介质之间的相对速度（切向速度）v <20m / sec时，const = -0.8×v 2 + 33.7×v + 4,250，当切向速度v≥20m/ sec时，const = 4,600。版权所有（C）2008，JPO＆INPIT

9. 发明专利

JP2003151116A MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDER USING THE SAME 审中-公开
公开(公告)号：JP2003151116A
公开(公告)日：2003-05-23
申请号：JP2001344017
申请日：2001-11-09
申请人： HITACHI LTD
发明人： IGARASHI KAZUSUKATSU , AKAGI FUMIKO , HIRAYAMA YOSHIYUKI , YAMAMOTO TOMOO , TOMIYAMA HIROSHI , HOSOE YUZURU
IPC分类号： G11B5/66 , G11B5/64
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium suitable for high density magnetic recording with high resolution, low noise and small thermal fluctuation, and a mass magnetic storage device realized in using the medium, etc. SOLUTION: In this magnetic recording medium having at least three or more magnetic layers on a non-magnetic substrate, when a magnetic layer which is farthest from the non-magnetic substrate is used as a magnetic layer for recording, a magnetic layer which is father from the non-magnetic substrate next to the layer for recording is used as a magnetic layer for stabilization, and the entire magnetic layers other than the magnetic layer for recording and the magnetic layer for stabilization are used as a group of lower magnetic layers, an AFC type thin film magnetic recording medium has a connection layer made of non-magnetic material or weak magnetic material having nature that makes the magnetization of a contact magnetic layer reverse between the magnetic layer for recording and the magnetic layer for stabilization, and uses a magnetic recording medium, wherein the rearrangement of the magnetic layer for stabilization and the group of lower magnetic layers generally ends within 10 millisecond after recording.

10. 发明专利

JP2001256605A MAGNETIC HEAD, MAGNETIC DISK DEVICE, AND INFORMATION RECORDING SYSTEM 失效
公开(公告)号：JP2001256605A
公开(公告)日：2001-09-21
申请号：JP2000076333
申请日：2000-03-14
申请人： HITACHI LTD
发明人： TOMIYAMA HIROSHI , HAMAGUCHI KATSUHIKO , HARA YOSHINORI , AKAGI FUMIKO , NISHIDA YASUTAKA
IPC分类号： G11B5/012 , G11B5/02 , G11B5/187 , G11B5/31 , G11B5/48
摘要： PROBLEM TO BE SOLVED: To provide a magnetic head, capable of preventing the acceleration of the heat softening of an adjacent track, even in the area of a large skew angle, and a magnetic disk device. SOLUTION: As a representative means, the shape of an upper magnetic pole is formed, in such a manner that in the maximum skew angle position, the maximum value of a slanting shadow length in disk radial direction is set equal to/lower than that of the track pitch.

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