公开(公告)号：JPS62104109A

公开(公告)日：1987-05-14

申请号：JP24456385

申请日：1985-10-31

Applicant: SONY CORP

Inventor： ISHIKAWA OSAMU ,  HAYAKAWA MASATOSHI ,  HAYASHI KAZUHIKO ,  OCHIAI YOSHITAKA ,  MATSUDA HIDEKI ,  IWASAKI HIROSHI ,  ASO KOICHI

IPC: H01F10/16 ,  C22C38/00 ,  C22C38/10

Abstract: PURPOSE:To obtain the soft magnetic thin film having high saturation magnetic flux density Bs and high permeability mu and especially sperior abrasion resistance property by specifying the composition of a soft magnetic thin film formed of an alloy of Fe-Co-Si-Al group added with Cr. CONSTITUTION:A magnetic thin film mainly composed of Fe, Co, Si and Al is added with chrominum Cr. Namely, Fe, Co, Si and Alare main components and the composition is as 5-15atm% Co, 6-17atm% Si, 2-13atm% Al, 0.5-7atm% N, and Fe as the remainder. If the content of Co is beyond the range of 5-15atm%, an increase of a coersive force or a decline of permeability can be observed. Also, 6-17atm% of Si and 2-13atm% of Al are necessary. If the contents of Si and Al are beyond such ranges, for example, a coersive force increases so that they can not be used as a core material of a magnetic head, and at the same time, a lowering of a saturation magnetic flux density or permeability can be observed.

公开(公告)号：JPS6289309A

公开(公告)日：1987-04-23

申请号：JP23046585

申请日：1985-10-16

Applicant: SONY CORP

Inventor： HAYAKAWA MASATOSHI ,  HAYASHI KAZUHIKO ,  ISHIKAWA OSAMU ,  OCHIAI YOSHITAKA ,  MATSUDA HIDEKI ,  IWASAKI HIROSHI ,  ASO KOICHI

IPC: H01F10/14 ,  C22C38/00 ,  C22C38/10 ,  G11B5/31 ,  H01F10/16

Abstract: PURPOSE:To obtain the titled soft magnetic thin film having a high permeability, an excellent corrosion-resisting property, an excellent abrasion-resisting property of high degree of hardness, and thermal stability without lowering the density of saturated magnetic flux and without increasing magnetic coercive force by a method wherein nitrogen N is added to the magnetic thin film having Fe, Co and Si as the main components, and the composition of compound of said magnetic thin film is specified. CONSTITUTION:The titled magnetic thin film has Fe, Co and Si as main composition, it is composed of Co of 5-15atom%, Si of 17-23atom%, N of 0.01-5atom%, and the remainder of Fe, and excellent serviceability is given to the magnetic thin film. If the content of nitrogen N is 0.01atom% or less, sufficient effect can not be expected, and if said content exceeds 5atom%, the permeability of the magnetic thin film is lowered on the contrary, and there is a possibility of increasing magnetic coercive force. It is desirable that the magnetically soft thin film is manufactured by performing a vapor-deposition method, an ion-implanting method and the like. Also, pertaining to the introduction of nitrogen N on the magnetic thin film, there are method such as one wherein a vapor-deposition and the like to be performed in the atmosphere containing nitrogen gas, and the method wherein nitrogen N is introduced into the magnetic thin film using a compound consisting of nitrogen N and at least a kind of element selected from the above-mentioned components and the alloy of the remaining component as the source of evaporation.

公开(公告)号：JPS61240612A

公开(公告)日：1986-10-25

申请号：JP8194485

申请日：1985-04-17

Applicant: SONY CORP

Inventor： HAYAKAWA MASATOSHI ,  ASO KOICHI ,  OCHIAI YOSHITAKA ,  MATSUDA HIDEKI ,  HAYASHI KAZUHIKO ,  ISHIKAWA OSAMU ,  IWASAKI HIROSHI

IPC: C22C38/00 ,  C22C38/10 ,  H01F10/16

Abstract: PURPOSE:To obtain a soft magnetic thin film having high saturated magnetic flux density and superior anti-corrosiveness, by selecting Fe, Co, Si as constituent elements of the soft magnetic thin film and setting up the composition ratio of them within a specific limited composition range. CONSTITUTION:The composition comprises Co 9-15atom%, Si 19-23atom%, and Fe as the remaining part. When the Si content becomes less than 19atom% or larger than 23atom%, a coercitive force of a produced soft magnetic thin film becomes more than 2.0 Oersteds. Particularly, with the composition range being made Si 20-21.5atom% and Co 11-13.5atom%, the coercitive force can be attained to less than 0.7 Oersted, to make magnetostriction curves crossed with each other. Moreover, because the too large Si content causes a saturated magnetic flux density to be lowered, the Si content should be preferably restricted to the degree of 23atom%.

公开(公告)号：JPS61234509A

公开(公告)日：1986-10-18

申请号：JP7733885

申请日：1985-04-11

Applicant: SONY CORP

Inventor： HAYASHI KAZUHIKO ,  HAYAKAWA MASATOSHI ,  OCHIAI YOSHITAKA ,  MATSUDA HIDEKI ,  ISHIKAWA OSAMU ,  IWASAKI HIROSHI ,  ASO KOICHI

IPC: C22C38/00 ,  C22C38/02 ,  C23C14/34 ,  C23C14/35 ,  G11B5/127 ,  G11B5/31 ,  H01F10/14

Abstract: PURPOSE:To enable the thin film whose composition is expressed by FeaGabSic and which has the soft magnetic characteristic of the same degree as Sendust alloy and the remarkably high saturated magnetic flux density by specifying a range of the above composition. CONSTITUTION:The composition is expressed by FeaGabSic (wherein a.b. and c show the composition rate by atm%) and a range of this composition is the range of formula. For example, Fe, Ga and Si are weighed so as to meet the predetermined composition rate and these are fused and cast by use of a high-frequency induction heating furnace. After that, by mechanical process, these are made into the alloy target for sputtering of 4 inches diameter and 4mm thickness. Sputtering is done by using this alloy target and a high-frequency magnetron sputtering device so that a thin film on a crystallized glass substrate is obtained. Furthermore, this thin film is annealed to be cooled gradually and a soft magnetic thin film is obtained. This can meet the enhancement of the coersive force of a magnetic recording medium sufficiently and it becomes possible to contrive the high quality and high recording density.

公开(公告)号：JPS60263304A

公开(公告)日：1985-12-26

申请号：JP12025084

申请日：1984-06-12

Applicant: SONY CORP

Inventor： HAYASHI KAZUHIKO ,  HAYAKAWA MASATOSHI ,  OCHIAI YOSHITAKA ,  MATSUDA HIDEKI ,  ISHIKAWA OSAMU ,  ASO KOUICHI

IPC: G11B5/127 ,  G11B5/147 ,  G11B5/23

Abstract: PURPOSE:To improve the permeability of a magnetic head by providing an action gap formed to a conductive magnetic core with a nonmagnetic conductor and a means which flows a current to the magnetic core across the action gap. CONSTITUTION:A conductive magnetic core 7 is energized by a power supply 9, and a current (i) flows as shown by an arrow head along the magnetic path of the core 7 and across an action magnetic gap (g). Thus the uniaxial anisotropy is produced in the direction orthogonal to the current (i), i.e., the magnetic path of an artificial ring shape. Thus the permeability of the core 7 is improved at a high frequency band together with the reproduction sensitivity of a head. While the direction of the uniaxial anisotropy can be changed with control of the current value when the core 7 is energized as long as said anisotropy is previously provided to the core 7 in the prescribed direction, i.e., the circumferential direction of said artificial ring. This improves the reproduction sensitivity of the head at an optional frequency band.

公开(公告)号：JPS59227014A

公开(公告)日：1984-12-20

申请号：JP10144683

申请日：1983-06-07

Applicant: SONY CORP

Inventor： OCHIAI YOSHITAKA ,  ASO KOUICHI ,  KAMIHIRA AKIRA ,  HAYAKAWA MASATOSHI ,  MATSUDA HIDEKI ,  HAYASHI KAZUHIKO ,  ISHIKAWA OSAMU

IPC: G11B5/127 ,  G11B5/147 ,  G11B5/31 ,  G11B5/12 ,  G11B5/16

Abstract: PURPOSE:To cause no magnetic deterioration in a core due to joining of the core and a reinforcing body, by placing the reinforcing body between amorphous magnetic thin film cores and fusion-bonding the reinforcing body and the thin film core into one body by a solder of a low melting point. CONSTITUTION:A reinforcing body is placed on both surfaces, of amorphous magnetic thin film cores 3a, 3b placed inbetween, and this thin film core and the reinforcing body are joined by a solder 7 of a solder a low melting point. The low melting solder whose melting point is 123 deg.C or 143 deg.C is used. In this case, if there is a problem in an adhesive property of this low melting point solder and the amorphous magnetic thin film core, or an dhesive peroperty of this low melting point solder and the reinforcing body, a material component of this thin film, for instance, a non-magnetic layer of a spatteringing film of Si, or a non-magnetic layer made by spattering, etc. of SiO2 is stuck to the surface of the thin film core, and in the reinforcing body side, too, an amorphous non- magnetic layer can be formed by spattering in the same way as necessary.

公开(公告)号：JPS5921004A

公开(公告)日：1984-02-02

申请号：JP13093582

申请日：1982-07-27

Applicant: Sony Corp

Inventor： HAYASHI KAZUHIKO ,  ASO KOUICHI ,  KAMIHIRA AKIRA ,  OCHIAI YOSHITAKA ,  HAYAKAWA MASATOSHI ,  MATSUDA HIDEKI ,  HOTAI KAZUHIDE

IPC: C22C45/04 ,  G11B5/127 ,  G11B5/147 ,  G11B5/255 ,  H01F1/153

CPC classification number: H01F1/153

Abstract: PURPOSE:To maintain ductility of amorphous magnetic material and increase the saturation magnetic flux density and further improve the anticorrosion and antiabrasion, by a method wherein constituents represented by Ap, Bq, Cr, Ds and ratio are specified. CONSTITUTION:When represented by general formula Ap, Bq, Cr, Ds (p+q+r+ s=100at%), constituent amounts p, q, r, s are selected in regions 70

Abstract translation: 目的：通过规定由Ap，Bq，Cr，Ds和比率表示的成分的方法，为了保持非晶磁性材料的延展性并增加饱和磁通密度，并进一步改善抗腐蚀和抗磨损性。 构成：当由通式Ap，Bq，Cr，Ds（p + q + r + s = 100at％）表示时，在区域70

公开(公告)号：JPS599157A

公开(公告)日：1984-01-18

申请号：JP11901382

申请日：1982-07-08

Applicant: Sony Corp

Inventor： HAYAKAWA MASATOSHI ,  ASO KOUICHI ,  KAMIHIRA AKIRA ,  OCHIAI YOSHITAKA ,  MATSUDA HIDEKI ,  HOTAI KAZUHIDE ,  HAYASHI KAZUHIKO

IPC: C21D1/04 ,  C21D6/00 ,  C22C45/02 ,  C22F1/00 ,  C22F1/10 ,  G11B5/127 ,  G11B5/147 ,  H01F1/153

CPC classification number: H01F1/15341 ,  C21D1/04

Abstract: PURPOSE: To increase the magnetic permeability of a thin amorphous magnetic alloy plate even when the alloy composition has high saturation magnetic flux density by keeping the plate at a specified temp. and by alternately impressing magnetic fields to the plate in directions which are perpendicular to each other at equal time intervals to heat treat the plate.
CONSTITUTION: A thin amorphous magnetic alloy plate 1 is put in an electric furnace and kept at a temp. below the crystallization temp. of the alloy and below the Curie temp. By supplying electric currents to coils 2, 3 wound around the plate 1 perpendicularly to each other, magnetic fields which meet at right angles are alternately generated to heat treat the plate 1. At this time, electric currents are supplied to the coils 2, 3 in accordance with timing wave-forms 4, 5 shown by the figure. This method is applicable to an amorphous magnetic alloy having a cooling effect in a magnetic field, and high magnetic permeability can be given even to a composition having ≥10,000 saturation magnetic flux density. Accordingly, a superior material for the soft magnetic core of a magnetic head, etc. can be provided.
COPYRIGHT: (C)1984,JPO&Japio

Abstract translation: 目的：为了提高薄的非晶磁性合金板的磁导率，即使当合金组成通过将板保持在特定温度时具有高饱和磁通密度时。 并且通过以相等的时间间隔相互垂直的方向交替地向板施加磁场，以对板进行加热处理。 构成：将薄的无定形磁性合金板1放入电炉中并保持在温度 低于结晶温度 的合金，低于居里温度。 通过向卷绕在板1上的线圈2,3提供电流，交替地产生垂直相交的磁场，以对板1进行热处理。此时，电流被提供给线圈2,3 按照波形图4,5，如图所示。 该方法适用于在磁场中具有冷却效果的非晶磁合金，甚至可以赋予具有> = 10000饱和磁通密度的组成的高磁导率。 因此，可以提供用于磁头等的软磁芯的优良材料。

公开(公告)号：JPH0552470B2

公开(公告)日：1993-08-05

申请号：JP18094284

申请日：1984-08-30

Applicant: SONY CORP

Inventor： HAYAKAWA MASATOSHI ,  OCHIAI YOSHITAKA ,  MATSUDA HIDEKI ,  ISHIKAWA OSAMU ,  HAYASHI KAZUHIKO ,  ASO KOICHI

IPC: G01R33/12 ,  G01R33/16

公开(公告)号：JPH0337721B2

公开(公告)日：1991-06-06

申请号：JP12348782

申请日：1982-07-15

Applicant: SONY CORP

Inventor： MATSUDA HIDEKI ,  ASO KOICHI ,  KAMIHIRA AKIRA ,  OCHIAI YOSHITAKA ,  HAYAKAWA MASATOSHI ,  HOTAI KAZUHIDE ,  HAYASHI KAZUHIKO

IPC: C21D6/00 ,  C22F1/00 ,  H01F1/153