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公开(公告)号：US20090225465A1
公开(公告)日：2009-09-10
申请号：US12232014
申请日：2008-09-09
申请人： Hitoshi Iwasaki , Kenichiro Yamada , Junichi Akiyama , Masayuki Takagishi , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu
发明人： Hitoshi Iwasaki , Kenichiro Yamada , Junichi Akiyama , Masayuki Takagishi , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu
CPC分类号： G11B5/1278 , G11B5/3116 , G11B2005/001
摘要： A magnetic recording head includes a main magnetic pole, and a laminated body. The laminated body includes a first magnetic layer, a second magnetic layer, a first intermediate layer provided between the first magnetic layer and the second magnetic layer, and a third magnetic layer laminated with the first and second magnetic layers and the first intermediate layer. The third magnetic layer exerts a magnetic field on at least any of the first magnetic layer and the second magnetic layer. The third magnetic layer has larger saturation magnetization than at least any of the first magnetic layer and the second magnetic layer.
摘要翻译： 磁记录头包括主磁极和层叠体。 层叠体包括第一磁性层，第二磁性层，设置在第一磁性层和第二磁性层之间的第一中间层，以及与第一和第二磁性层和第一中间层层叠的第三磁性层。 第三磁性层在第一磁性层和第二磁性层中的至少任一个上施加磁场。 第三磁性层比第一磁性层和第二磁性层中的至少任意一个具有更大的饱和磁化强度。
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公开(公告)号：US20090052095A1
公开(公告)日：2009-02-26
申请号：US12155329
申请日：2008-06-02
申请人： Kenichiro Yamada , Hitoshi Iwasaki , Junichi Akiyama , Masayuki Takagishi , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu , Shuichi Murakami , Tadashi Kai
发明人： Kenichiro Yamada , Hitoshi Iwasaki , Junichi Akiyama , Masayuki Takagishi , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu , Shuichi Murakami , Tadashi Kai
IPC分类号： G11B5/33
CPC分类号： G11B5/17 , G11B5/02 , G11B5/1278 , G11B5/3133 , G11B5/3146 , G11B2005/0002 , G11B2005/0024
摘要： A magnetic recording head includes:a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes are operable to pass a current through the laminated body.
摘要翻译： 磁记录头包括：主磁极; 层压体; 和一对电极。 层叠体包括具有比由主磁极施加的磁场低的矫顽力的第一磁性层，具有低于由主磁极施加的磁场的矫顽力的第二磁性层，以及设置在第一磁性体之间的中间层 层和第二磁性层。 该对电极可操作以使电流通过层叠体。
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公开(公告)号：US07054087B2
公开(公告)日：2006-05-30
申请号：US10944882
申请日：2004-09-21
CPC分类号： G11B5/7325 , G11B5/00 , G11B5/012 , G11B5/127 , G11B5/64 , G11B13/045 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： A magnetic recording-reproducing apparatus has a magnetic recording medium having a nonmagnetic substrate, and a functional layer and a recording layer formed on the nonmagnetic substrate, the recording layer exhibiting a magnetic anisotropy energy density KuRL, the functional layer developing ferromagnetism upon irradiation with light so as to exhibit a magnetic anisotropy energy density KuFL lower than the magnetic anisotropy energy density KuRL and the functional layer serving to lower the magnetic anisotropy energy density of the recording layer through exchange coupling interaction with the recording layer when the functional layer is irradiated with light, a light source which irradiates the functional layer with light, and a magnetic head having a writing head writing signal magnetization by applying a magnetic field to the recording layer and a reading head reading the signal magnetization recorded in the recording layer.
摘要翻译： 磁记录再现装置具有磁记录介质，其具有非磁性基板，以及在非磁性基板上形成的功能层和记录层，所述记录层呈现磁各向异性能量密度Ku <！ - SIPO
的功能层，而功能层用于降低 当功能层被光照射时通过与记录层的交换耦合相互作用的记录层的磁各向异性能量密度，用光照射功能层的光源以及具有写入头写入信号磁化的磁头通过施加 记录层的磁场和读取记录在记录层中的信号磁化的读取头。 -
公开(公告)号：US06982845B2
公开(公告)日：2006-01-03
申请号：US10400532
申请日：2003-03-28
申请人： Tadashi Kai , Masayuki Takagishi , Masashi Sahashi , Junichi Akiyama , Hitoshi Iwasaki , Akira Kikitsu
发明人： Tadashi Kai , Masayuki Takagishi , Masashi Sahashi , Junichi Akiyama , Hitoshi Iwasaki , Akira Kikitsu
IPC分类号： G11B5/02
CPC分类号： B82Y10/00 , G11B5/00 , G11B9/04 , G11B9/1409 , G11B11/08 , G11B11/10 , G11B2005/0002 , G11B2005/0005
摘要： A magnetic recording apparatus comprises a magnetic field impression unit, a current supplying unit and a controlling unit t. The magnetic field impression unit impresses a magnetic field to a magnetic recording medium. The current supplying unit supplies a current to the magnetic recording medium. The controlling unit makes the current supplying unit supply the current to the magnetic recording medium while making the magnetic field impression unit impress the magnetic field to at least a unit of a magnetic recording unit of the magnetic recording medium. Thus, a information is recorded magnetically by making a direction of a magnetization of the magnetic recording unit of the magnetic recording medium in a predetermined direction.
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65.发明授权公开(公告)号：US06795380B2
公开(公告)日：2004-09-21
申请号：US10108503
申请日：2002-03-29
IPC分类号： G11B1100
CPC分类号： G11B5/4826 , G11B5/127 , G11B5/3103 , G11B5/3967 , G11B5/4833 , G11B7/00 , G11B13/045 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： A pair of members opposed to each other via a gap are commonly used as an evanescent light probe and a writing magnetic head. When the spacing and width of the gap are smaller than the wavelength &lgr; of injected light, highly intensive evanescent light is generated from the gap position of the opposite surface. Magnetic writing is carried out by applying a recording magnetic field from the pair of members to a medium heated by the evanescent light.
摘要翻译： 经由间隙彼此相对的一对构件通常用作渐逝光探针和写入磁头。 当间隙的间隔和宽度小于注入的光的波长λ时，从相对表面的间隙位置产生高度强烈的消逝光。 通过将记录磁场从一对构件施加到由渐逝光加热的介质来进行磁写入。
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66.发明授权Magnetic recording medium with L10 crystal grains including three or more elements 有权具有L10晶粒的磁记录介质包括三个或更多个元件公开(公告)号：US06777078B2
公开(公告)日：2004-08-17
申请号：US10050118
申请日：2002-01-18
IPC分类号： G11B565
摘要： A magnetic recording medium has a substrate, an underlayer formed on the substrate, a magnetic layer formed on the underlayer and including crystal grains having an L10 structure mainly including Fe and Pt, mainly including Fe and Pd, or mainly including Co and Pt, and the crystal grains further including 0.1 to 50 atomic percent of at least one additive element dissolved therein.
摘要翻译： 磁记录介质具有衬底，在衬底上形成的底层，形成在底层上的磁性层，并且包括主要包含Fe和Pt或主要包括Co和Pt的具有主要包括Fe和Pt的L10结构的晶粒，以及 晶粒还包含溶解在其中的至少一种添加元素的0.1至50原子％。
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67.发明授权公开(公告)号：US06741524B2
公开(公告)日：2004-05-25
申请号：US09749802
申请日：2000-12-28
IPC分类号： G11B1100
CPC分类号： G11B5/00 , G11B5/1278 , G11B9/10 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： Electrons are directed from an electron emitter towards a magnetic recording medium to heat a recording portion of the magnetic recording medium and magnetic information is written by a magnetic recording head to the temperature-elevated recording portion. Otherwise, a magnetic head having a magnetic pole is used and the magnetic pole serves as an electron emitter as well. Alternatively, a space between the electron emitter and recording medium is made shorter smaller the mean free path of electrons in the atmosphere to considerably improve the recording density.
摘要翻译： 电子从电子发射器朝向磁记录介质被引导以加热磁记录介质的记录部分，并且磁信息由磁记录头写入升温记录部分。 否则，使用具有磁极的磁头并且磁极也用作电子发射器。 或者，电子发射器和记录介质之间的空间使得气氛中的电子的平均自由程更短，从而显着地提高了记录密度。
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公开(公告)号：US06195233B1
公开(公告)日：2001-02-27
申请号：US09520143
申请日：2000-03-07
申请人： Junichi Akiyama , Hiroaki Yoda
发明人： Junichi Akiyama , Hiroaki Yoda
IPC分类号： G11B5147
CPC分类号： G11B5/1278 , G11B5/012 , G11B2005/0029
摘要： Disclosed is a thin-film magnetic head comprising a ring-shaped magnetic core and a coil surrounded by the magnetic core, given that an inner circumferential length of the magnetic core surrounding the coil is Lc, a magnetic gap length is g, a magnetic gap depth is D, an average magnetic flux density (unit: T (tesla)) is Bav and an effective magnetic permeability of the magnetic core is &mgr;, Lc, g and D being determined in such a manner that a magnetomotive force I needed for recording, expressed by a following equation (1), becomes equal to or less than 0.1 A·T (Ampere·Turn): I = 2 π DBav μLog { [ ( Lc + g ) + 2 π D ] / ( Lc + g ) } ( 1 ) where Log is a natural logarithm, and variables in the equation (1) are expressed in SI units.
摘要翻译： 公开了一种薄膜磁头，其包括环形磁芯和被磁芯包围的线圈，假定围绕线圈的磁芯的内周长度为Lc，磁隙长度为g，磁隙为 深度为D，平均磁通密度（单位：T（特斯拉））为Bav，磁芯的有效磁导率为μ，Lc，g和D以使得记录所需的磁动势I得以确定 由下式（1）表示，变为等于或小于0.1 AT（Ampere.Turn）：其中Log是自然对数，式（1）中的变量以SI为单位表示。
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公开(公告)号：US06172858B2
公开(公告)日：2001-01-09
申请号：US09479651
申请日：2000-01-07
申请人： Hiroaki Yoda , Yuichi Ohsawa , Kohichi Tateyama , Reiko Kondoh , Toshihiko Ohta , Junichi Akiyama , Hitoshi Iwasaki
发明人： Hiroaki Yoda , Yuichi Ohsawa , Kohichi Tateyama , Reiko Kondoh , Toshihiko Ohta , Junichi Akiyama , Hitoshi Iwasaki
IPC分类号： G11B5127
CPC分类号： B82Y10/00 , B82Y25/00 , G11B5/1278 , G11B5/3163 , G11B5/3903 , G11B5/3912 , G11B5/3919 , G11B5/3932 , G11B5/3967 , G11B5/399 , G11B2005/0016 , G11B2005/0018 , G11B2005/3996 , Y10T29/49025
摘要： The present invention provides a thin film head having a magnetoresistance effect element which includes at least two magnetic films, a nonmagnetic film sandwiched between the magnetic films, and leads connected to the magnetoresistance effect element wherein the width of one of the magnetic films, which essentially responds to a signal magnetic field, is not more than a distance between leads. The present invention provides a thin film head having a magnetoresistance effect element which includes at least two magnetic films and a nonmagnetic film sandwiched between the magnetic films, which makes use of a change in magnetic resistance caused by spin-dependent scattering, wherein at least a portion of one magnetic films, which essentially respond to a signal magnetic field extends in a direction same as that of the signal magnetic field.
摘要翻译： 本发明提供了一种具有磁阻效应元件的薄膜头，该磁阻效应元件包括至少两个磁性膜，夹在磁性膜之间的非磁性膜和连接到磁阻效应元件的引线，其中一个磁性膜的宽度基本上 响应信号磁场，不超过引线之间的距离。 本发明提供了具有磁阻效应元件的薄膜头，该磁阻效应元件包括至少两个磁性膜和夹在磁性膜之间的非磁性膜，其利用由自旋依赖性散射引起的磁阻的变化，其中至少一个 基本上响应于信号磁场的一个磁性膜的部分在与信号磁场的方向相同的方向上延伸。
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公开(公告)号：US6021024A
公开(公告)日：2000-02-01
申请号：US292214
申请日：1994-08-19
CPC分类号： G11B5/6005 , G11B5/012 , G11B5/4886
摘要： A magnetic disk drive for carrying out reading/writing of information to/from a magnetic disk having a plurality of tracks including an innermost circumference track and an outermost circumference track. The disk drive includes a rotary actuator and a magnetic head mounted on a magnetic head slider which has separate writing and reading elements. The elements have a magnetic gap for reading and writing the information on a magnetic disk. A rotary actuator arm has one end connected to a rotary actuator and the other end connected to the magnetic head slider. The head slider has an inflow end and an outflow end for the fluid flow generated by the rotation of the disk and at least one bearing which generates a dynamic pressure by the fluid flow. The head is provided close to the outflow. A skew angle created between the magnetic gap length direction and the rotating direction of the disk is substantially constant between the innermost and the outermost tracks. The bearing is arranged at a given angle with respect to the rotating direction so that the outflow end is located on the outer circumferential side of the magnetic disk from the inflow end.
摘要翻译： 一种磁盘驱动器，用于对具有包括最内圆周轨道和最外圆周轨道的多个轨道的磁盘执行信息的读/写。 磁盘驱动器包括旋转致动器和安装在具有单独的写入和读取元件的磁头滑块上的磁头。 这些元件具有用于在磁盘上读取和写入信息的磁隙。 旋转致动器臂的一端连接到旋转致动器，另一端连接到磁头滑块。 磁头滑块具有用于由盘的旋转产生的流体流的流入端和流出端，以及由流体流产生动态压力的至少一个轴承。 头部靠近流出口提供。 在磁隙长度方向和盘的旋转方向之间产生的倾斜角度在最内侧轨道和最外侧轨道之间基本恒定。 轴承相对于旋转方向以给定的角度布置，使得流出端从流入端位于磁盘的外周侧。
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