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公开(公告)号：DE3681056D1
公开(公告)日：1991-10-02
申请号：DE3681056
申请日：1986-04-10
Applicant: SONY CORP
Inventor： HAYASHI KAZUHIKO , HAYAKAWA MASATOSHI , OCHIAI YOSHITAKA , MATSUDA HIDEKI , ISHIKAWA WATARU , IWASAKI YOU , ASO KOUICHI
Abstract: Disclosed is a soft magnetic thin film which has superior soft magnetic characteristics and high saturation magnetic flux density. The magnetic thin film is formed by physical vapour deposition process and composed of Fe, Ga, and Si with optional inclusion of Co, Ru, or Cr.
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公开(公告)号：JPS60119649A
公开(公告)日：1985-06-27
申请号：JP22815783
申请日：1983-12-02
Applicant: SONY CORP
Inventor： ASO KOUICHI , OCHIAI YOSHITAKA , SUGIURA GIICHI
IPC: G11B11/10 , G11B11/105
Abstract: PURPOSE:To improve the S/N by forming a soft magnetic thin film made of an amorphous material mainly made of Co onto a magnetic recording layer formed on the base. CONSTITUTION:A magnetic recording layer, i.e., a vertical magnetizing film 12 is formed on a base 11 and the soft magnetic thin film 13 made of the amorphous material mainly made of Co formed by the vapor deposition or sputter is formed. A material having a large Kerr rotating angle thetaK is preferred for the film 13 and a low magnetostriction amorphous alloy including lots of cobalt atoms is preferred. The recording of information is recorded to hatched parts and the magnetization 16 is inverted. A magnetized pattern 17 is produced to the film 13 by the magnetic distribution of the magnetic recording layer 12, the magnetized pattern 17 is produced to the film 13 and the information of the layer 12 is transferred to the film 13. The information is read by forming the laser light to linear polarized light 5, irradiating the light to the film 13, utilizing the magnetic Kerr effect where the polarized plane is rotated by the reflection on the film 13 and detecting its reflecting light 5'.
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公开(公告)号：JPS60116742A
公开(公告)日：1985-06-24
申请号：JP22586583
申请日：1983-11-30
Applicant: SONY CORP
Inventor： ISHIKAWA OSAMU , HAYASHI KAZUHIKO , HAYAKAWA MASATOSHI , OCHIAI YOSHITAKA , MATSUDA HIDEKI , ASO KOUICHI
IPC: C22C32/00
Abstract: PURPOSE:To obtain a specially suitable amorphous magnetic alloy as a core material of a magnetic head used as a magnetic recording and reproducing for a magnetic recording medium having high coercive force such as a metallic tape, by dispersing and mixing a fine granule of metal carbide selected among TaC, WC, NbC, MoC, VC and Cr3C2. CONSTITUTION:An amorphous magnetic alloy is composed by dispersing and mixing fine granules of a metal carbide selected among TaC, WC, NbC, MoC, VC and Cr3C2 into a base alloy in the ratio of 0.1-10vol%. An average grain size of the fine granule of said metal carbide is in a range of, for example, 0.1- 10.0mu preferably 0.5-1.0mu. In order to prevent the metal carbide from dissolving in the base alloy, the metal element of fine granules of said carbides is desirably dissolved as a component of the base alloy into said base alloy. Namely, when a composition of the base alloy for dispersing, for example, the fine TaC granule is supposed to be an Fe-Co-Ta-B series and said TaC granule is mixed into the base alloy, the TaC granule is hardly dissolved in the base alloy and its magnetic characteristic is deviated not so much from an expected value.
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公开(公告)号：JPS567219A
公开(公告)日：1981-01-24
申请号：JP8095479
申请日：1979-06-27
Applicant: SONY CORP
Inventor： ASO KOUICHI , MAKINO YOSHIMI , KAMIHIRA AKIRA , ITOU MORIYASU , HAYAKAWA MASATOSHI
Abstract: PURPOSE:To obtain a high-permeability and high-magnetic flux density magnetic head, by polishing the surface of an amorphous alloy having a comparatively small positive magnetic distortion constant and by etching it. CONSTITUTION:An amorphous alloy having a comparatively small positive magnetic distortion constant such as the Co-system amorphous alloy is adjusted. Next, the surface of the obtained amorphous alloy is subjected to processings such as unidirectional polishing dependent upon the tape coated with an abrasive paper, minute- diameter alumina, and so on, thereby making an axis difficult to magnetize and an axis easy to magnetize in the polishing direction and the orthogonal direction respectively. Next, the processed surface is eliminated by etching by approximately 1.5mum or more to eliminate the processing distortion layer on the surface.
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公开(公告)号：JPS5580303A
公开(公告)日：1980-06-17
申请号：JP15524178
申请日：1978-12-13
Applicant: SONY CORP
Inventor： MAKINO YOSHIMI , KAMIHIRA AKIRA , ITOU MORIYASU , ASO KOUICHI , HAYAKAWA MASATOSHI
Abstract: PURPOSE:To obtain a soft magnetic core suitable for magnetic heads, by preparing a thin core material by the use of an amorphous alloy of FeCo.SiB wherein the composition is specified and the magnetic Curie temperature is lower than crystallizing temperature, forming the material into a core shape, holding the core at a specified temperature, and then rapidly cooling it. CONSTITUTION:A thin core material is prepared by using an amorphous alloy which is expressed by (Fe1-xCox)100-z(Si1-yBy)z, where x=0.90-0.98, y=0.30- 0.80, and z=22-30, and a Curie temperature Tc is lower than a crystallizing temperature Tcry. Then, the material is machined into a core shape. After the core is held at a temperature T which is 0.95XTc( deg.K)
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Patent Agency Ranking
公开(公告)号：JPS5443118A
公开(公告)日：1979-04-05
申请号：JP10974677
申请日：1977-09-12
Applicant: SONY CORP
Inventor： ASO KOUICHI , KAMIHIRA AKIRA , MAKINO YOSHIMI , ITOU MORIYASU , TAMURA HIDEMASA
Abstract: PURPOSE:To provide an amorphous magnetic alloy suitable for use as a magnetic head material obtd. by adding a limited amt. of Ru and one or more kinds of amorphism forming elements selected from P, C, Si, B and Ge to iron. CONSTITUTION:The amorphous magnetic alloy consists of Ru; 2-20at%, one or more kinds of amorhism forming elements selected from P, C, Si, B and Ge; 10- 30%, and the balance almost iron. The addn. of Ru decreases the magnetostriction constant and this compsn improves the working resistance and toughness, thereby reducing a fluctuation in effective permeability before and after resin molding. This alloy can be rolled to stably manufacture tough straight foil.
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公开(公告)号：JPS52135788A
公开(公告)日：1977-11-14
申请号：JP5266976
申请日：1976-05-07
Applicant: SONY CORP
Inventor： ISHIKAWA REIJI , SETO NOBUYOSHI , KOJIMA CHIAKI , KODERA YOUICHI , YAMADA TOSHIROU , TAMURA HIDEO , MORI TOSHIO , ASO KOUICHI , MAKINO YOSHIMI
Abstract: PURPOSE:To provide a method for detecting impurities or contaminants adhered on vessels for cosmetics or foods, glasses or ceramics for electric materials with good precision by having a specific substance adsorbed on impurities to be remained and irradiating excited light to effect luminescence of said substance.
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公开(公告)号：JPS58107607A
公开(公告)日：1983-06-27
申请号：JP20634781
申请日：1981-12-21
Applicant: SONY CORP
Inventor： OCHIAI YOSHITAKA , MAKINO YOSHIMI , ASO KOUICHI , KAMIHIRA AKIRA , HAYAKAWA MASATOSHI , HOTAI KAZUHIDE
Abstract: PURPOSE:To attain high maganetic permeability through the condition which is the same as that when there is no inductive magnetic anisotropy by executing heat processing under the magnetic field so that the inductive magnetic anisotropy Ki which crosses orthogonally and equal to that at the time of manufacturing. CONSTITUTION:A sample is produced using magnetic distortion-free amorphous Fe5Co75Si4B16 (atomic ratio). In view of eliminating distortion generated during manufacturing process and non-homogeneous anisotropy, the field is applied in the direction (x) for the heat processing under the field. Thereby the inductive magnetic anisotropy in the direction (x) can be obtained. This sample is placed under the heat processing in the orthogonal field by applying the field to the direction (y) orthogonally crossing the direction (x). Thereby, the inductive field anisotropies Kx and Ky in the directions (x) and (y) become equal. Now, it seems that the inductive magnetic anisotropy does not physically exist within amorphous magnetic material and high magnetic permeability can be attained.
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公开(公告)号：JPS57140824A
公开(公告)日：1982-08-31
申请号：JP2505381
申请日：1981-02-23
Applicant: SONY CORP
Inventor： MAKINO YOSHIMI , OCHIAI YOSHITAKA , ASO KOUICHI , KAMIHIRA AKIRA , HAYAKAWA MASATOSHI , HODAI KAZUHIDE
Abstract: PURPOSE:To produce a magnetostrictive delay wire having uniform characteristics by heat-treating a thin strip consisting of an amorphous magnetic alloy at temps. lower than the crystallization temp. of the amorphous magnetic alloy while holding the same in the state in which tension is acted upon the same. CONSTITUTION:An amorphous alloy ribbon 1 is taken up from a supply reel 2 via a kiln 4 on a take-up reel 3. At this time, tension to the extent of permitting holding of the ribbon 1 substantially linearly is acted upon said ribbon, wherein the tension of about is sufficient. The treating temp. in the kiln 4 is required to be maintained at the temp. lower than the crystallization temp. because the amorphous alloy 1 does not crystallize. The heat treating time is determined by the correlation with treating temps. The cooling may be natural air cooling, but in general it is accomplished at about 25 deg.C/sec. The magnetostrictive constant of the magnetostrictive material is preferably negative.
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公开(公告)号：JPS55161057A
公开(公告)日：1980-12-15
申请号：JP6955879
申请日：1979-06-04
Applicant: SONY CORP
Inventor： KAMIHIRA AKIRA , ITOU MORIYASU , ASO KOUICHI , HAYAKAWA MASATOSHI
Abstract: PURPOSE:To increase the permeability of a Co-Fe type amorphous alloy over a wide frequency band zone by rapidly cooling the alloy whose magnetic Curie temp. is lower than the crystallization temp. from a specified temp. followed by reheating treatment in a nonmagnetic field. CONSTITUTION:A soft magnetic core for a magnetic head such as a video head requiring superior permeability at very high frequency is made of Co-Fe type amorphous alloy contg. Co>=60 atomic% and Fe 15-25 atomic%. Ni may be substituted for part of the Co, and Si or B>=22 atomic% is added as an element for making the alloy amorphous. The magnetic Curie temp. To of this alloy is made lower than the crystallization temp. Tcry. This alloy is heated to T deg.K satisfying 0.95XTc( deg.K)
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