公开(公告)号：US5227940A

公开(公告)日：1993-07-13

申请号：US728498

申请日：1991-07-11

申请人： Tatsuya Isomura ,  Osamu Shimizu ,  Satoshi Yoshida ,  Kanji Nakanishi

发明人： Tatsuya Isomura ,  Osamu Shimizu ,  Satoshi Yoshida ,  Kanji Nakanishi

IPC分类号： G11B5/187

CPC分类号： G11B5/1878 ,  G11B5/1871 ,  G11B5/1874

摘要： A composite magnetic head comprises a pair of magnetic core halves each including a core block formed of an oxide magnetic material and a soft magnetic thin film disposed on said core block interposed with a reaction inhibiting layer, said core halves abutting to each other so that a magnetic gap is defined between the ends of said soft magnetic thin films. The magnetic head has a size relation bcd/a.ltoreq.0.2.times.10.sup.-10 m.sup.2 wherein a is a gap length, measured along the proceeding direction of a magnetic recording medium, c a gap depth, d a gap width as measured along the track width and b is a thickness of said reaction inhibiting layer. Wavy (beat) noise of output signal due to the psuedo gap produced by the reaction inhibiting layer is effectively suppressed.

公开(公告)号：US5114800A

公开(公告)日：1992-05-19

申请号：US549996

申请日：1990-07-09

申请人： Osamu Shimizu ,  Kanji Nakanishi

发明人： Osamu Shimizu ,  Kanji Nakanishi

IPC分类号： G11B5/127 ,  G11B5/31 ,  H01F10/14 ,  H01F10/16 ,  H01F10/28

CPC分类号： G11B5/1278 ,  G11B5/3109 ,  H01F10/14 ,  H01F10/16 ,  H01F10/28 ,  Y10S428/90 ,  Y10T428/115 ,  Y10T428/12465 ,  Y10T428/12799 ,  Y10T428/12951

摘要： Uniaxially oriented soft magnetic thin film consists essentially of 1 to 15 atomic percent of Co and/or Ni, and the balance being Fe, and has a crystal structure of a body-centered cubic system, wherein the film is oriented substantially in the [111] direction and the absolute value of the saturation magnetostriction .lambda..sub.f of the film is not more than 5.times.10.sup.-6. The film has low coercivity 1 Oe or less and high magnetic permeability maintaining high saturation magnetic flux density of 18 kG or more. .lambda..sub.f reaches zero and is adjustable. Addition of 0.2 to 20 atomic percent of Ru, Mn, Cr and/or V increases wear resistance. The film is formed by deposition on {111} plane of GaAs substrate, or on c-plane of hexagonal B.sub.8 stracture.

摘要翻译： 单向取向软磁性薄膜基本上由1〜15原子％的Co和/或Ni构成，余量为Fe，具有体心立方体系的晶体结构，其中膜取向为[111 ]方向，并且膜的饱和磁致伸缩λf的绝对值不大于5×10 -6。 该膜具有低矫顽力1Oe以下，高磁导率保持18kG以上的高饱和磁通密度。 λf达到零并且是可调节的。 添加0.2〜20原子％的Ru，Mn，Cr和/或V增加耐磨性。 该膜通过在GaAs衬底的{111}平面上或在六边形B8结构的c面上沉积而形成。

公开(公告)号：US06303240B1

公开(公告)日：2001-10-16

申请号：US08479843

申请日：1995-06-07

申请人： Osamu Shimizu ,  Kanji Nakanishi

发明人： Osamu Shimizu ,  Kanji Nakanishi

IPC分类号： G11B566

CPC分类号： G11B5/65 ,  H01F10/131 ,  Y10S428/90

摘要： A soft magnetic thin film having a compositional formula FeaBbNc, wherein a, b and c each denote atomic percent and B denotes at least one of Co, Ni and Ru, and wherein the compositional range is given by 0

摘要翻译： 具有组成式FeaBbNc的软磁性薄膜，其中a，b和c各自表示原子百分比，B表示Co，Ni和Ru中的至少一种，其中组成范围由0

公开(公告)号：US5614329A

公开(公告)日：1997-03-25

申请号：US845619

申请日：1992-03-04

申请人： Osamu Shimizu ,  Kanji Nakanishi

发明人： Osamu Shimizu ,  Kanji Nakanishi

IPC分类号： G11B5/147 ,  G11B5/31 ,  H01F10/13 ,  G11B5/66

CPC分类号： H01F10/132 ,  G11B5/147 ,  G11B5/3109 ,  H01F10/131 ,  Y10S428/90 ,  Y10T428/115 ,  Y10T428/12465 ,  Y10T428/12931 ,  Y10T428/12944 ,  Y10T428/12951

摘要： A soft magnetic thin film represented by the formula Fe.sub.a X.sub.b Zr.sub.c B.sub.d, wherein a, b, c and d stand for atomic percents for respective components and X indicates at least one of Co, Ni, Cr and V. The proportions of the components is such that 86.ltoreq.a+b.ltoreq.93, 0

摘要翻译： 由式FeaXbZrcBd表示的软磁性薄膜，其中a，b，c和d表示各成分的原子百分比，X表示Co，Ni，Cr和V中的至少一种。组分的比例为86

公开(公告)号：US5061576A

公开(公告)日：1991-10-29

申请号：US457670

申请日：1989-12-27

申请人： Osamu Shimizu ,  Satoshi Yoshida

发明人： Osamu Shimizu ,  Satoshi Yoshida

IPC分类号： G11B5/31

CPC分类号： G11B5/3106 ,  Y10S428/90 ,  Y10T428/1164 ,  Y10T428/12819

摘要： A thin film magnetic head comprises a substrate, a lower magnetic layer, an insulating layer and an upper magnetic layer formed in that order on said substrate, and a protective layer formed on said upper magnetic layer and having an end surface exposed on the running surface directed to a recording medium. The protective layer consists essentially of 20 to 95 mole % of at least two of ZrO.sub.2, TiO.sub.2 and SiO.sub.2 and 5 to 80 mole % of at least one of WO.sub.3 and MoO.sub.3, and has controlled Vickers hardness of 400 to 700 kgf/mm.sup.2 with reduced residual stress of 0.1-0.5 GPa.

摘要翻译： 薄膜磁头包括在所述基板上依次形成的基板，下磁性层，绝缘层和上磁性层，以及形成在所述上磁性层上并具有暴露在运行表面上的端面的保护层 指向记录介质。 保护层基本上由20至95摩尔％的ZrO 2，TiO 2和SiO 2中的至少两种和5至80摩尔％的WO 3和MoO 3中的至少一种组成，并且维持在400至700kgf / mm 2的维氏硬度，同时还原 残余应力为0.1-0.5 GPa。