公开(公告)号：US07168255B2

公开(公告)日：2007-01-30

申请号：US10808277

申请日：2004-03-25

申请人： Akiko Saito ,  Tadahiko Kobayashi

发明人： Akiko Saito ,  Tadahiko Kobayashi

IPC分类号： F25B21/00 ,  B22F3/00

CPC分类号： F25B21/00 ,  F25B2321/0022 ,  H01F1/012 ,  Y02B30/66

摘要： The magnetic composite material of the present invention is used as a working substance in the magnetic refrigeration system and comprising at least two phases, including, a first phase composed of an intermetallic compound represented by a general formula: La(Fe(Co, Ni)Si)13, having an NaZn13 type crystal structure, and a second phase is composed of an iron alloy containing Si. The first phase is precipitated in an expansion size of 100 μm or less in average. Preferably, the magnetic composite material contains Fe as a principal component, La in an amount from 4 atomic % to 12 atomic %, Si in an amount from 2 atomic % to 21 atomic %, and Co and Ni in a total amount from 0 atomic % to 11 atomic %, and the total amount of Fe, Co and Ni being from 75 atomic % to 92 atomic %.

摘要翻译： 本发明的磁性复合材料用作磁性制冷系统中的工作物质，其至少包括两相，包括由通式La（Fe（Co，Ni））表示的金属间化合物构成的第一相， Si）13 N，具有NaZn 13 N型晶体结构，第二相由含有Si的铁合金构成。 第一相的平均膨胀尺寸为100μm以下。 优选地，磁性复合材料含有Fe为主要成分，La为4原子％至12原子％的量，Si为2原子％至21原子％，Co和Ni的总量为0原子 ％〜11原子％，Fe，Co和Ni的总量为75原子％〜92原子％。

公开(公告)号：US20060254385A1

公开(公告)日：2006-11-16

申请号：US11414302

申请日：2006-05-01

申请人： Hideyuki Tsuji ,  Akiko Saito ,  Tadahiko Kobayashi

发明人： Hideyuki Tsuji ,  Akiko Saito ,  Tadahiko Kobayashi

IPC分类号： H01F1/08

CPC分类号： H01F1/015

摘要： A powder raw material is prepared by mixing at least two kinds of powders selected from a powder A, a powder B, a powder C, and a powder D. A sintered body of a magnetic material having an NaZn13 crystal structure phase is formed by heating the powder raw material while applying a pressure treatment. The powder A is at least one of elemental powder of element R selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. The powder B is at least one of elemental powder of element T selected from Fe, Co, Ni, Mn, and Cr. The powder C is at least one of elemental powder of element M selected from Si, B, C, Ge, Al, Ga, and In. The powder D is a compound powder composed of at least two kinds of elements selected from the element R, the element T, and the element M.

摘要翻译： 通过混合选自粉末A，粉末B，粉末C和粉末D中的至少两种粉末来制备粉末原料。具有NaZn 13 N的磁性材料的烧结体 >晶体结构相通过在施加压力处理的同时加热粉末原料而形成。 粉末A是选自Y，La，Ce，Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Tm和Yb中的元素R的元素粉末中的至少一种。 粉末B是选自Fe，Co，Ni，Mn和Cr中的元素T的元素粉末中的至少一种。 粉末C是选自Si，B，C，Ge，Al，Ga和In中的元素M的元素粉末中的至少一种。 粉末D是由选自元素R，元素T和元素M中的至少两种元素组成的复合粉末。

公开(公告)号：US06304415B1

公开(公告)日：2001-10-16

申请号：US09615783

申请日：2000-07-13

申请人： Kohichi Tateyama ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Akio Hori ,  Takashi Koizumi ,  Tomohiko Nagata

发明人： Kohichi Tateyama ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Akio Hori ,  Takashi Koizumi ,  Tomohiko Nagata

IPC分类号： G11B531

CPC分类号： G11B5/3109 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/3153 ,  G11B5/3163 ,  G11B5/3967

摘要： At least one magnetic pole out of a pair of magnetic poles is provided with a T-shaped magnetic pole having a magnetic pole chip at the position contacting with a magnetic gap and an auxiliary magnetic pole which is wider than thereof. The proximity of an air bearing surface of the T-shaped magnetic pole is composed of a laminated film containing a magnetic material layer with a high saturated magnetic flux density which composes the magnetic pole chip and a portion of the auxiliary magnetic pole and a magnetic material layer with a low saturated magnetic flux density which composes the remaining portion of the auxiliary magnetic pole. When the front portion of the magnetic pole with the track width of 1.8 &mgr;m or less is composed of a laminated film containing a magnetic material layer having a high saturated magnetic flux density and a magnetic material layer having a low saturated magnetic flux density, the thickness of the magnetic material layer having the high saturated magnetic flux density is 0.5 &mgr;m or more. According to the above described magnetic pole, the magnetic saturation near the tip portion of the magnetic pole is controlled, so that preferable magnetic field strength and magnetic field gradient can be attained when the track width is narrowed.

摘要翻译： 在一对磁极中的至少一个磁极设置有在与磁隙接触的位置处具有磁极片的T形磁极和比其宽的辅助磁极。 T形磁极的空气轴承表面的接近度由包含构成磁极片和辅助磁极的一部分的磁性材料层和具有高饱和磁通密度的磁性材料层的叠层膜构成， 具有构成辅助磁极的剩余部分的低饱和磁通密度的层。 当磁道宽度为1.8μm或更小的磁极的前部由包含具有高饱和磁通密度的磁性材料层和具有低饱和磁通密度的磁性材料层的层叠膜构成时，厚度 具有高饱和磁通密度的磁性材料层的厚度为0.5μm以上。 根据上述磁极，控制磁极尖端部附近的磁饱和，从而当磁道宽度变窄时可以获得优选的磁场强度和磁场梯度。

公开(公告)号：US06198597B1

公开(公告)日：2001-03-06

申请号：US09153858

申请日：1998-09-16

申请人： Kohichi Tateyama ,  Hiroaki Yoda ,  Atsuhito Sawabe ,  Naoyuki Inoue ,  Akio Hori ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Takasi Koizumi ,  Tomohiko Nagata ,  Takeo Sakakubo ,  Kei Sakoda

发明人： Kohichi Tateyama ,  Hiroaki Yoda ,  Atsuhito Sawabe ,  Naoyuki Inoue ,  Akio Hori ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Takasi Koizumi ,  Tomohiko Nagata ,  Takeo Sakakubo ,  Kei Sakoda

IPC分类号： G11B531

CPC分类号： G11B5/3113 ,  G11B5/3116 ,  G11B5/3163

摘要： A thin-film magnetic head comprises a magnetic gap disposed to be positioned on an air bearing surface of the magnetic head, a pair of magnetic poles disposed to hold the magnetic gap therebetween, and a coil positioned between the pair of the magnetic poles to intersect the magnetic poles, wherein at least one of the magnetic poles being composed of a T-shaped magnetic pole, the T-shaped magnetic pole comprising a front part of a magnetic pole contacting with the magnetic gap, an intermediate part of a magnetic pole lying on the front part, and a rear part of a magnetic pole lying on the intermediate part, wherein a width of the front part roughly defines a track width, the rear part has a wider width in a direction of track width than a width of the front part, and the intermediate part contacts with the rear part at an entire width of the rear part at the air bearing surface and has a narrower width at a contacting face with the front part than the width of the rear part.

摘要翻译： 薄膜磁头包括设置在磁头的空气轴承表面上的磁隙，设置成保持磁隙的一对磁极和位于一对磁极之间的线圈，以相交 磁极，其中至少一个磁极由T形磁极组成，T形磁极包括与磁隙接触的磁极的前部，位于磁极的中间部分 在前部的前部和位于中间部的磁极的后部，前部的宽度大致限定轨道宽度，后部在轨道宽度方向上的宽度比宽度宽 前部，并且中间部分在后部的空气轴承表面的整个宽度处与后部接触，并且在与前部的接触面处具有比后部的宽度更窄的宽度。

公开(公告)号：US5920447A

公开(公告)日：1999-07-06

申请号：US818674

申请日：1997-03-14

申请人： Hiromi Sakata ,  Hiroaki Yoda ,  Tomomi Funayama ,  Kohichi Tateyama ,  Tadahiko Kobayashi ,  Shigeru Takekado ,  Yoichiro Tanaka

发明人： Hiromi Sakata ,  Hiroaki Yoda ,  Tomomi Funayama ,  Kohichi Tateyama ,  Tadahiko Kobayashi ,  Shigeru Takekado ,  Yoichiro Tanaka

IPC分类号： G11B5/012 ,  G11B5/02 ,  G11B5/39 ,  G11B5/48 ,  G11B5/55 ,  G11B23/00 ,  G11B5/29

CPC分类号： G11B5/3967 ,  G11B5/012 ,  G11B5/4826 ,  G11B5/488 ,  G11B5/4886 ,  G11B5/5526 ,  G11B23/0007 ,  G11B5/02

摘要： A magnetic multi-head unit includes: a specific magnetic head formed so that a pair of magnetic yokes face each other on the same plane via a magnetic gap inclined by a predetermined azimuth angle; and a magnetic head which is adjacent to the specific magnetic head and which is formed so that a pair of magnetic yokes face each other on a plane different from the plane of the specific magnetic head via a magnetic gap inclined by the azimuth angle. The specific magnetic head and the adjacent magnetic head are laminated so as to form a plurality of layers while being shifted from each other in directions in which tracks on a magnetic disk extend. A magnetic disk unit includes: a magnetic disk, on which a plurality of information recording tracks are formed so as to extend in peripheral directions and which is rotated; and a magnetic multi-head including a plurality of transducers as heads for simultaneously writing and/or reading magnetic information on the plurality of information recording tracks of the magnetic disk every predetermined group of the tracks. The plurality of transducers are positioned as one with respect to the predetermined group of the tracks.

摘要翻译： 磁性多头单元包括：特定磁头，其形成为使得一对磁轭经由倾斜预定方位角的磁隙在同一平面上彼此面对; 以及磁头，其与特定磁头相邻，并且形成为使得一对磁轭在与特定磁头的平面不同的平面上经由倾斜方位角的磁隙形成。 特定的磁头和相邻的磁头被层叠以形成多个层，同时在磁盘上的磁道延伸的方向上彼此偏移。 磁盘单元包括：磁盘，多个信息记录轨道形成为沿圆周方向延伸并旋转的磁盘; 以及包括多个换能器作为磁头的磁性多磁头，用于在每个预定磁道组中的每个磁盘的多个信息记录磁道上同时写入和/或读取磁信息。 多个换能器相对于预定的轨道组定位成一个。

公开(公告)号：US6108167A

公开(公告)日：2000-08-22

申请号：US150926

申请日：1998-09-10

申请人： Kohichi Tateyama ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Akio Hori ,  Takashi Koizumi ,  Tomohiko Nagata

发明人： Kohichi Tateyama ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Akio Hori ,  Takashi Koizumi ,  Tomohiko Nagata

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/187

CPC分类号： G11B5/3109 ,  G11B5/3146 ,  G11B5/3153 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3967

摘要： At least one magnetic pole out of a pair of magnetic poles is provided with a T-shaped magnetic pole having a magnetic pole chip at the position contacting with a magnetic gap and an auxiliary magnetic pole which is wider than thereof. The proximity of an air bearing surface of the T-shaped magnetic pole is composed of a laminated film containing a magnetic material layer with a high saturated magnetic flux density which composes the magnetic pole chip and a portion of the auxiliary magnetic pole and a magnetic material layer with a low saturated magnetic flux density which composes the remaining portion of the auxiliary magnetic pole. When the front portion of the magnetic pole with the track width of 1.8 .mu.m or less is composed of a laminated film containing a magnetic material layer having a high saturated magnetic flux density and a magnetic material layer having a low saturated magnetic flux density, the thickness of the magnetic material layer having the high saturated magnetic flux density is 0.5 .mu.m or more. According to the above described magnetic pole, the magnetic saturation near the tip portion of the magnetic pole is controlled, so that preferable magnetic field strength and magnetic field gradient can be attained when the track width is narrowed.

摘要翻译： 在一对磁极中的至少一个磁极设置有在与磁隙接触的位置处具有磁极片的T形磁极和比其宽的辅助磁极。 T形磁极的空气轴承表面的接近度由包含构成磁极片和辅助磁极的一部分的磁性材料层和具有高饱和磁通密度的磁性材料层的叠层膜构成， 具有构成辅助磁极的剩余部分的低饱和磁通密度的层。 当轨道宽度为1.8μm或更小的磁极的前部由包含具有高饱和磁通密度的磁性材料层和具有低饱和磁通密度的磁性材料层的层叠膜构成时， 具有高饱和磁通密度的磁性材料层的厚度为0.5μm以上。 根据上述磁极，控制磁极尖端部附近的磁饱和，从而当磁道宽度变窄时可以获得优选的磁场强度和磁场梯度。

公开(公告)号：US5739600A

公开(公告)日：1998-04-14

申请号：US618119

申请日：1996-03-19

申请人： Tadahiko Kobayashi ,  Isao Sakai ,  Kiyohisa Hinohara

发明人： Tadahiko Kobayashi ,  Isao Sakai ,  Kiyohisa Hinohara

IPC分类号： B06B1/08 ,  H01L41/12

CPC分类号： B06B1/08

摘要： Provided is an underwater magnetrostrictive vibration device with reduced signal attenuation and improved in efficiency and sound quality, which has been low due to external noise disturbance. The underwater magnetrostrictive vibration device comprises a watertight vessel, a magnetic circuit constructing member for constructing a closed magnetic circuit having an end inserted watertight in the watertight vessel, a vibrator made of magnetrostrictive alloy and provided in the closed magnetic circuit, a permanent magnet provided in the closed magnetic circuit, for applying a magnetic bias to the vibrator, at least one coil provided in the periphery of the vibrator and selected from the group consisting of a magnetic field generating coil and a magnetic field detecting coil, stress applying means provided in the closed magnetic circuit, for applying compressive force in a vibration direction of the vibrator, a movable member capable of moving in a vibration direction of the vibrator and inserted watertight in an end portion of the magnetic circuit constructing member positioned on the opposite side of the watertight vessel, and a signal processing circuit board provided in the watertight vessel and connected to the at least one coil, for processing at least one signal selected from the group consisting of a vibration-generating signal and a vibration-detecting signal.

摘要翻译： 提供了一种具有降低的信号衰减并且提高效率和声音质量的水下磁致伸缩振动装置，其由于外部噪声干扰而已经很低。 水下磁致伸缩振动装置包括一个水密容器，一个磁路构造构件，用于构造一个封闭的磁路，其端头在水密容器中水密地插入，一个由磁致伸缩合金制成的振动器，设在闭合磁路中， 用于向振动器施加磁偏压的闭合磁路，设置在振动器的周围并从由磁场产生线圈和磁场检测线圈组成的组中选择的至少一个线圈，设置在振子的周围的至少一个线圈 闭合磁路，用于在振动器的振动方向施加压缩力;可移动部件，其能够在振动器的振动方向上移动并水密地插入位于水密相对侧的磁路构造部件的端部 容器，以及设置在w中的信号处理电路板 并且连接到所述至少一个线圈，用于处理从由振动产生信号和振动检测信号组成的组中选择的至少一个信号。

公开(公告)号：US5894384A

公开(公告)日：1999-04-13

申请号：US816336

申请日：1997-03-13

申请人： Tomomi Funayama ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Kohichi Tateyama

发明人： Tomomi Funayama ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Kohichi Tateyama

IPC分类号： G11B5/00 ,  G11B5/127 ,  G11B5/31 ,  G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3916 ,  G11B5/3919 ,  G11B5/3958 ,  G11B5/3967 ,  G11B2005/0008 ,  G11B2005/3996 ,  G11B5/3113 ,  G11B5/3183

摘要： The magnetic head comprises two magnetoresistance effect elements and a soft magnetic film connecting end portions of the magnetoresistance effect elements with each other. The two magnetoresistance effect elements and the soft magnetic film are arranged in series so as to form a single magnetic circuit, and a magnetic gap is provided in the side of a surface facing a magnetic medium. Magnetic flux from the magnetic medium is introduced into the magnetoresistance effect elements through the magnetic gap. An insulating material may be used to fill the magnetic gap.

摘要翻译： 磁头包括两个磁阻效应元件和连接磁阻效应元件的端部彼此的软磁膜。 两个磁阻效应元件和软磁膜被串联布置以形成单个磁路，并且在面向磁介质的表面的侧面设置磁隙。 来自磁介质的磁通量通过磁隙引入到磁阻效应元件中。 可以使用绝缘材料来填充磁隙。

公开(公告)号：US4066378A

公开(公告)日：1978-01-03

申请号：US737419

申请日：1976-11-01

申请人： Toshio Saito ,  Tadahiko Kobayashi

发明人： Toshio Saito ,  Tadahiko Kobayashi

IPC分类号： B23B39/16 ,  B23B39/18

CPC分类号： B23B39/16 ,  Y10T408/3811

摘要： A multi-spindle drilling machine which can perform drilling and tapping using a number of spindles in such a way that by dividing the pitch circle of the holes to be worked into several divisions, all holes are machined by a number of strokes of the spindle head. The setting of the tool spindles is done within a short time by a simple arrangement with the aid of a conventional electronic calculator.

公开(公告)号：US06333840B1

公开(公告)日：2001-12-25

申请号：US09270681

申请日：1999-03-16

申请人： Hiroaki Yoda ,  Tadahiko Kobayashi ,  Kohichi Tateyama ,  Hiromi Sakata

发明人： Hiroaki Yoda ,  Tadahiko Kobayashi ,  Kohichi Tateyama ,  Hiromi Sakata

IPC分类号： G11B5127

CPC分类号： B82Y10/00 ,  G11B5/012 ,  G11B5/09 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3903 ,  G11B5/3967 ,  G11B20/10

摘要： There is provided a magnetic recording apparatus capable of carrying out signal reproduction with high accuracy by using a narrow gap head structure corresponding to high recording density. An asymmetric gap structure MR head includes a magnetoresistance element 26 having a magnetoresistance film 24 and a pair of electrodes 25 disposed at the upper side; a reproducing magnetic gap film 23 disposed only at the lower side of the magnetoresistance element 26; a magnetic shielding film 22 disposed so as to make a laminate with the magnetoresistance element 26 through the reproducing magnetic gap film 23; and an insulating film 27 disposed at the upper side of the magnetoresistance element 26. When a signal is read by use of such a reproducing head, the signal of the present bit is read by subtracting a value obtained by multiplying signals of a plurality of previous bits by predetermined coefficients from the present reproduction signal. As another reproduction signal processing system, a partial response system is adopted.

摘要翻译： 提供了一种能够通过使用对应于高记录密度的窄间隙头结构以高精度执行信号再现的磁记录装置。 非对称间隙结构MR头包括具有磁阻膜24和设置在上侧的一对电极25的磁阻元件26。 设置在磁阻元件26的下侧的再现磁隙膜23; 设置成通过再现磁隙膜23与磁阻元件26层叠的磁屏蔽膜22; 以及设置在磁阻元件26的上侧的绝缘膜27.当通过使用这种再现头读取信号时，通过减去通过将多个先前的信号乘以信号而获得的值来读取当前位的信号 比特由来自当前再现信号的预定系数。 作为另一再现信号处理系统，采用部分响应系统。