公开(公告)号：JPS61234507A

公开(公告)日：1986-10-18

申请号：JP7733685

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 ,  G11B5/127 ,  G11B5/31 ,  H01F10/14

Abstract: PURPOSE:To enable the thin film whose composition is expressed by FeaSibGec 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 FeaSibGec (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, Si and Ge 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：JPS6157871A

公开(公告)日：1986-03-24

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

Abstract: PURPOSE: To measure magnetic permeability easily with high precision by measuring the magnetic permeability on the basis of the ratio of the output voltage of a coil for magnetic field detection in a uniform AC magnetic field and the output voltage of a differential coil whose output voltage is nearly zero in a normal state when a sample is inserted.
CONSTITUTION: The position of the differential coil 4 is set in a uniform AC magnetic field established by the coil 1 for AC magnetic field generation so that the output voltage is nearly zero. Then, a sample is inserted into one coil part 4a of this coil 4 and output voltages V
3 and V
4 of magnetic field detecting coils 3 and 4 depending upon induced electromotive force are measured. The ratio of the voltages V
3 and V
4 is calculated and then the magnetic permeability μ
r of the sample 7 is calculated and measured easily with high precision without any influence of an AC frequency, etc. In the equation, S
3 and S
7 are the sectional areas of the coil 3 and sample 7 respectively.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：通过以均匀的交流磁场的磁场检测用线圈的输出电压与输出电压为的差分线圈的输出电压之间的磁导率测定磁导率，可以容易地高精度地测定导磁率 当插入样品时，在正常状态下几乎为零。 构成：将差分线圈4的位置设定在由线圈1建立的用于AC磁场产生的均匀的交流磁场中，使得输出电压几乎为零。 然后，将样品插入到该线圈4的一个线圈部分4a中，并且测量根据感应电动势的磁场检测线圈3和4的输出电压V3和V4。 计算电压V3和V4的比率，然后以高精度，容易地计算和测量样品7的磁导率，而不受AC频率等的影响。在等式中，S3和S7是 线圈3和样品7。

公开(公告)号：JPS60263414A

公开(公告)日：1985-12-26

申请号：JP12025184

申请日：1984-06-12

Applicant: SONY CORP

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

IPC: C23C16/50 ,  C23C16/44 ,  H01F10/12 ,  H01F10/13 ,  H01F41/22

Abstract: PURPOSE:To obtain a soft magnetic thin film having high permeability in a high- frequency band by growing a magnetic thin film while energizing a film surface, which is forming, toward a predetermined direction in forming a soft magnetic thin film with a vapor phase thin film growing method. CONSTITUTION:An effect equivalnt to sputtering or evaporating in a magnetic field can be obtained when a film is formed while energizing in forming a thin film with sputtering or evaporating. As a magnetic field applied always meets at right angles to a direction of a current, even a magnetic path having a complicated form can be vested with uniaxial anisotropy meeting at right angles to the magnetic path without fail by forming the film while energizing a part corresponding to the magnetic path. For instance, in case of forming a film by flowing an electric grain (i) between both ends of a ring magnetic path 1, a direction ''b'' of an axis of easy magnetization meets at right angles to a direction (a) of the magnetic path 1 at each part of the magnetic path 1.

公开(公告)号：JPS59140357A

公开(公告)日：1984-08-11

申请号：JP1417983

申请日：1983-01-31

Applicant: Sony Corp

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

IPC: H01F1/153 ,  C22F1/00 ,  C22F1/10 ,  G11B5/127 ,  G11B5/147 ,  G11B5/245 ,  H01F1/14

Abstract: PURPOSE: To improve the magnetic permeability of an amorphous magnetic alloy in a high frequency region and to make an alloy suitable for use as the material of a magnetic core or the like by heat treating sheets of the alloy to eliminate the magnetic anisotropy and by coating the sheets with a resin or the like to produce magnetic anisotropy in the vertical direction.
CONSTITUTION: Sheets 3 of an amorphous magnetic alloy are heat treated in a rotating magnetic field or the like to eliminate the induction magnetic anisotropy. The sheets 3 are laminated while interposing a molding material 4 such as epoxy resin, and both sides of the laminate are coated with the material 4 to produce magnetic anisotropy in the vertical direction to the principal faces of the sheets 3. Both sides of a laminate of the sheets 3 alone may be coated with the material 4. By this method the magnetic permeability of the sheets 3 in a high frequency region of ≥0.1MHz can be improved when the sheets 3 are used as the material of the magnetic core of a magnetic head.
COPYRIGHT: (C)1984,JPO&Japio

Abstract translation: 目的：为了提高高频区域的非晶磁性合金的导磁率，通过对合金的片材进行热处理以除去磁各向异性，并通过涂布来形成适合用作磁芯等的材料的合金 具有树脂等的片材以在垂直方向上产生磁各向异性。 构成：将非晶磁性合金的片材3在旋转磁场等中进行热处理以消除感应磁各向异性。 在插入诸如环氧树脂的模制材料4的同时层压片材3，并且层压体的两侧涂覆有材料4以在垂直于片材3的主面的垂直方向上产生磁各向异性。层叠体的两侧 单独的片材3可以被材料4涂覆。通过这种方法，当片材3用作磁芯的材料时，可以提高片材3在> = 0.1MHz的高频区域中的导磁率 磁头。

公开(公告)号：JPS59136444A

公开(公告)日：1984-08-06

申请号：JP965783

申请日：1983-01-24

Applicant: Sony Corp

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

IPC: H01F1/153 ,  C22C19/07 ,  C22C45/04 ,  H01F1/14

Abstract: PURPOSE: To develop an amorphous magnetic alloy excellent in magnetic characteristics, processability, corrosion resistance and anti-wear property, by a method wherein a Co-Fe-Ta-B alloy having a specific composition containing Co as a main component is melted while the molten alloy is cooled by a super- rapid cooling method to be made amorphous.
CONSTITUTION: An alloy having a composition represented by a general formula (FeCo)
x Ta
y B
z (wherein x+y+z=100 atom% and x=74W81 atom% y=1W 12 atom% and x+y=75W95 atom%) and contains Co as a main component is prepared by a melting method. This alloy is prepared by quenching and solidifying molten substance as an amorphous magnetic material by a quenching apparatus without using a metalloid element as an amorphousness forming material such as Si and used in preparing the core material of a magnetic head for magnetic recording and reproduction. This amorphous magnetic alloy does not show the deterioration of magnetic permeability and the lowering of mechanical properties even if heated for a long time at a high temp. and excellent in processability, corrosion resistance and anti-wear property.
COPYRIGHT: (C)1984,JPO&Japio

Abstract translation: 目的：通过以Co为主成分的具有特定组成的Co-Fe-Ta-B合金熔融而开发磁特性，加工性，耐腐蚀性，耐磨损性优异的非晶磁性合金， 熔融合金通过超快速冷却方法冷却而制成无定形。 构成：具有由通式（FeCo）xTayBz（其中x + y + z = 100原子％，x = 74-81原子％y = 1- 12原子％，x + y = 75-95）表示的组成的合金 原子％）和含有Co作为主要成分的方法。 该合金是通过淬火装置淬火和固化熔融物质作为非晶磁性材料而制备的，而不使用准金属元素作为非晶形成材料如Si，并用于制备用于磁记录和再现的磁头的芯材。 该非晶磁性合金即使在高温下长时间加热，也不显示导磁率的劣化和机械性能的降低。 加工性，耐腐蚀性和耐磨性优异。

公开(公告)号：JPS5914609A

公开(公告)日：1984-01-25

申请号：JP12348782

申请日：1982-07-15

Applicant: Sony Corp

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

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

CPC classification number: H01F1/15341

Abstract: PURPOSE:To improve permeability in a high frequency region by combining the thermal processings under the rotating magnetic field and vertical magnetic field and by selecting temperature to the specified relation. CONSTITUTION:An amorphous magnetic thin plate 1 is placed under the thermal processing in the rotating magnetic field and vertical magnetic field. In this case, the thermal processing under vertical magnetic field is carried out following the processing under the rotating magnetic field or this sequence may be inverted. In any case, a temperature Ta2 of the thermal processing to be executed first should satisfy the following relation. Namely, the temperature Ta1 is 300 deg.C or higher and is not higher than the Curie temperature Tc of amorphous magnetic material, while the temperature Ta2 is equal to Ta1 or lower and is 250 deg.C or higher but 350 deg.C or lower. Thereby, an inductive magnetic anisotropy can be controlled on the basis of three dimension and permeability in a frequency region as high as 10kHz or higher can be improved.

Abstract translation: 目的：通过组合旋转磁场下的热处理和垂直磁场，并通过选择温度达到指定关系，提高高频区的磁导率。 构成：将非晶磁性薄板1置于旋转磁场和垂直磁场的热处理之下。 在这种情况下，在旋转磁场下的处理之后进行垂直磁场下的热处理，或者该顺序可以反转。 在任何情况下，首先执行的热处理的温度Ta2应满足以下关系。 即，温度Ta1为300℃以上且不高于非晶磁性材料的居里温度Tc，而温度Ta2等于Ta1或更低，为250℃或更高，但为350℃或更高 降低。 因此，可以基于三维来控制感应磁各向异性，并且可以提高高达10kHz或更高的频率区域的磁导率。

公开(公告)号：JPS596360A

公开(公告)日：1984-01-13

申请号：JP11586482

申请日：1982-07-02

Applicant: Sony Corp

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

IPC: C22F1/00 ,  C21D6/00 ,  C22F1/10 ,  H01F1/153 ,  H01F1/16

Abstract: PURPOSE: To carry out the heat treatment of a large amount of or/and a continuous amorphous magnetic alloy, by a method wherein an amorphous magnetic alloy thin strip is applied with a magnetic field sufficient for being equalized in induction magnetic anisotropy in two directions crossing at right angles in the main surface of said thin strip at the Curie temp. thereof or less and the crystallization temp. thereof or less to be subjected to heat treatment.
CONSTITUTION: An amorphous magnetic alloy thin strip 1 is wound cylindrically and, for example, a solenoid coil 2 is provided to the cylindrical thin strip 1 to apply a magnetic field H
1 thereto in the longitudinal direction thereof at the Curie temp. of said alloy or less and the crystallization temp. thereof or less to carry out heat treatment. By this method, induction magnetic anisotropy K
//l is generated in the longitudinal direction within the main surface of the thin strip 1. In the next step, an external magnetic field H
3 is applied to the same cylindrical thin strip in the width direction thereof under the same temp. condition as mensioned above to carry out heat treatment. In this case, induction magnetic anisotopy K⊥
l is generated in the direction crossing the longitudinal direction at right angles within the main surface of the thin strip 1 to complete heat treatment in a time satisfying the condition of K
//l ≃K⊥
l . By this method, an amorphous magnetic alloy having high permeability capable of being used as a soft magnetic material can be prepared by a mass production system.
COPYRIGHT: (C)1984,JPO&Japio

Abstract translation: 目的：为了进行大量的或/和连续的非晶磁性合金的热处理，通过这样一种方法，其中非晶磁性合金薄带被施加足够的磁场，以在两个方向上的交叉的两个方向上的感应磁各向异性相等 在居里温度下在所述薄带的主表面处以直角。 以下，结晶温度。 以下进行热处理。 构成：将非晶磁性合金薄带1卷绕成圆筒状，在圆筒形薄带1上设置螺线管线圈2，在其长边方向以居里温度施加磁场H1。 的所述合金或更低的结晶温度。 以下进行热处理。 通过该方法，在薄带1的主表面内沿长度方向产生感应磁各向异性K // l。在下一步骤中，外部磁场H3施加到宽度方向上的同一圆柱形薄带 在同一温度 上述情况进行热处理。 在这种情况下，感应磁异常Krt。 在薄带1的主表面内沿垂直于纵向方向的方向产生角度1，以在满足K // lapprox = Krt的条件的时间内完成热处理。 anglel。 通过该方法，可以通过大规模生产系统制备能够用作软磁性材料的具有高磁导率的无定形磁性合金。

公开(公告)号：JPS5712427A

公开(公告)日：1982-01-22

申请号：JP8443080

申请日：1980-06-20

Applicant: SONY CORP

Inventor： MATSUDA HIDEKI ,  YAMADA TOSHIROU

IPC: G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To increase the response speed limit, by providing a soft magnetic film surface vertical easy magnetized film in such way that the magnetic anisotropy of the said film become parallel to the shifting direction of a magnetic medium. CONSTITUTION:A magnetic garnet film 2b composed of Eu2.09La0.75Ca0.16Ge0.16 Al0.55Ga0.12Fe4.17O12 is provided on the back of a GdGa garnet substrate 2a, and then a diffusion preventing film of SiO2, an Al vapor-deposited film 2e and an SiO2 protective film are provided. A resistive coating 20 is applied on the upper surface of the substrate 2a. A soft magnetic garnet film 2 is provided so that the direction of its magnetic anisotropy is parallel to the shifting direction (arrow mark) of a magnetic tape 1. For instance, the beam given from an He-Ne laser is condensed to the film 2 via a polarizer 4 and a beam spliter 6. For the reflected light that receives the Faraday optical rotation corresponding to the magnetization of the film 2, the light modulated signal enters a photoelectric transducer 8 via photodetector 7. Thus an electric signal 9 corresponding such light modulated signal is delivered. As a result, the response speed limit can be increased.

公开(公告)号：JP2508462B2

公开(公告)日：1996-06-19

申请号：JP18231686

申请日：1986-08-02

Applicant: SONY CORP

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

IPC: C22C38/00 ,  H01F10/12 ,  H01F10/14

公开(公告)号：JPH04105235A

公开(公告)日：1992-04-07

申请号：JP22400790

申请日：1990-08-24

Applicant: SONY CORP

Inventor： OCHIAI YOSHITAKA ,  MATSUDA HIDEKI ,  NAGAKI TAKEHIRO ,  HASHIMOTO SHUNICHI

IPC: G11B11/10 ,  G11B5/02 ,  G11B5/127 ,  G11B11/105

Abstract: PURPOSE:To allow the reproduction of tracks of a small track width with a sufficient sensitivity by irradiating a perpendicularly magnetized film with linearly polarized light and detecting the magnetization inversion of the perpendicularly magnetized film with the extreme Kerr effect. CONSTITUTION:The magnetic field components perpendicular to the film plane of the perpendicularly magnetized film 3 exist in the leak magnetic field near a 2nd gap G2. The perpendicularly magnetized film 3 is magnetized by this perpendicular leak magnetic field component. On the other hand, this leak magnetic field is inverted according to the magnetization state of a magnetic recording medium 5 and, therefore, the magnetization of the perpendicularly magnetized film 3 is inverted according to the magnetization state of the magnetic recording medium 5. Then, this perpendicularly magnetized film 3 is irradiated with the linearly polarized light and the extreme Kerr rotating angle is detected, by which the magnetization inversion of the perpendicularly magnetized film 3 is detected. The reproduction of the tracks having the small track width is executed with the high sensitivity in this way.