公开(公告)号：DE3324729A1

公开(公告)日：1984-01-12

申请号：DE3324729

申请日：1983-07-08

Applicant: SONY CORP

Inventor： HAYAKAWA MASATOSHI ,  ASO KOICHI ,  UEDAIRA SATORU ,  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

Abstract: In a process for heat treating amorphous magnetic alloys by producing a film composed of the amorphous magnetic alloy and heat-treating the film at an elevated temperature below the Curie temperature and the crystallisation temperature of the amorphous magnetic alloy using a first magnetic field and a second magnetic field which are repeatedly applied in an alternating manner, the first magnetic field is applied for a predetermined time in one direction of a principle surface of the amorphous magnetic alloy film and the second magnetic field is applied for a predetermined time in a second direction perpendicular to the first direction in the principle surface of the amorphous magnetic alloy film.

公开(公告)号：DE3142770A1

公开(公告)日：1982-06-24

申请号：DE3142770

申请日：1981-10-28

Applicant: SONY CORP

Inventor： MAKINO YOSHIMI ,  OCHIAI YOSHITAKA ,  UEDAIRA SATORU ,  HOTAI KAZUHIDE ,  ASO KOICHI ,  HAYAKAWA MASATOSHI

IPC: C22F1/00 ,  C21D1/04 ,  C22C19/07 ,  C22C45/04 ,  C22F1/10 ,  C22C1/04

公开(公告)号：CA1086986A

公开(公告)日：1980-10-07

申请号：CA310895

申请日：1978-09-08

Applicant: SONY CORP

Inventor： ASO KOICHI ,  UEDAIRA SATORU ,  ITO SHIGEYASU ,  TAMURA HIDEMASA ,  MAKINO YOSHIMI

IPC: C22C45/02 ,  G11B5/127 ,  G11B5/147 ,  H01F1/153 ,  C22C38/00

Abstract: An amorphous magentic alloy consists of 2 to 20 at % (atomic percent) of ruthenium atoms; 10 to 30 at% of atoms of at least one amorphous forming element selected from the group of phosphous, carbon, silicon, boron and germanium; and iron atoms as the predominant component of the residual.

公开(公告)号：HK1007625A1

公开(公告)日：1999-04-16

申请号：HK98106793

申请日：1998-06-25

Applicant: SONY CORP

Inventor： HAYASHI KAZUHIKO ,  OKABE AKIHIKO ,  HAYAKAWA MASATOSHI ,  ASO KOICHI

IPC: G11B5/64 ,  H01F10/18 ,  H01F ,  G11B

Abstract: A magnetic thin film having a composition represented by the following formula: (CoaPtbBcMd)100-xOx wherein a, b, c, d and x represent atomic percents of respective elements and satisfy relationships expressed as a = 100 - b - c - d 0

公开(公告)号：DE68925045T2

公开(公告)日：1996-08-22

申请号：DE68925045

申请日：1989-02-20

Applicant: SONY CORP

Inventor： HAYASHI KAZUHIKO ,  OKABE AKIHIKO ,  HAYAKAWA MASATOSHI ,  ASO KOICHI

IPC: G11B5/64 ,  H01F10/18

Abstract: A magnetic thin film having a composition represented by the following formula: (CoaPtbBcMd)100-xOx wherein a, b, c, d and x represent atomic percents of respective elements and satisfy relationships expressed as a = 100 - b - c - d 0

公开(公告)号：DE69013281D1

公开(公告)日：1994-11-17

申请号：DE69013281

申请日：1990-08-28

Applicant: SONY CORP

Inventor： HAYASHI KAZUHIKO ,  OKABE AKIHIKO ,  HAYAKAWA MASATOSHI ,  ASO KOICHI

IPC: G11B5/66 ,  G11B5/64 ,  G11B5/73

Abstract: A magnetic recording medium having a magnetic thin film of a composition expressed as (Coa Ptb Mc Md ) 100-x Ox (where a, b, c, d are atomic percent; and x is weight percent). In this composition, a + b + c + d = 100, 0 is at least one element selected from P, Si and Ge; and M is at least one element selected from B, Ga, Al, In, Sn and Sb. Such magnetic thin film is capable of retaining a large coercive force regardless of its thickness and can be formed without the necessity of raising the base temperature during deposition of a magnetic layer.

公开(公告)号：DE3880048T2

公开(公告)日：1993-11-11

申请号：DE3880048

申请日：1988-08-25

Applicant: SONY CORP

Inventor： OCHIAI YOCHITAKA ,  ASO KOICHI ,  HASHIMOTO SYUNICHI

IPC: G11B5/66 ,  G11B5/716 ,  G11B5/68 ,  G11B5/70 ,  G11B5/706

公开(公告)号：DE3780317D1

公开(公告)日：1992-08-20

申请号：DE3780317

申请日：1987-01-23

Applicant: SONY CORP

Inventor： HAYAKAWA MASATOSHI ,  NAGAKI TAKEHIRO ,  ASO KOICHI ,  YAMANOI HIROSHI

IPC: G11B11/105 ,  G11B11/10

Abstract: A device for producing a high frequency modulating mag­netic field is disclosed. The device is especially useful to achieve real-time overwriting in magneto-optical re­cording. The device produces magnetic field modulated according to a signal to be recorded on a magneto-optical recording medium (61) in which the signal is recorded in the form of magnetization direction on the magneto-­optical recording medium (61) under irradiation of a laser beam to raise the temperature of the medium (61). The device comprises a main magnetic pole (2) formed of a low-loss soft magnetic material and having one end facing to the magneto-optical recording medium (63) and a sheathed conductor (5) wound around the main magnetic pole (2) and consisting of a parallel connection of a plurality of insulated elementary wires (5).

公开(公告)号：DE3247286A1

公开(公告)日：1983-06-30

申请号：DE3247286

申请日：1982-12-21

Applicant: SONY CORP

Inventor： OCHIAI YOSHITAKA ,  MAKINO YOSHIMI ,  ASO KOICHI ,  UEDAIRA SATORU ,  HAYAKAWA MASATOSHI ,  HOTAI KAZUHIDE

IPC: C22F1/00 ,  C22F3/00 ,  G11B5/127 ,  G11B5/147 ,  H01F1/153 ,  C22C1/08

Abstract: A method of manufacturing an amorphous magnetic alloy having high permeability comprises the steps of: preparing an amorphous magnetic alloy ribbon having major surfaces; annealing said magnetic alloy ribbon at a temperature lower than the crystallization temperature of said alloy under the application of a first magnetic field in a first direction along said major surface for a period sufficient to induce a magnetic anisotropy in said first direction; and annealing said magnetic alloy ribbon at a temperature lower than the crystallization temperature of said alloy under the application of a second magnetic field in a second direction perpendicular to said first direction along said major surface until the induced magnetic anisotropies in said first and second directions become equal to each other.

公开(公告)号：CA1142066A

公开(公告)日：1983-03-01

申请号：CA354502

申请日：1980-06-20

Applicant: SONY CORP

Inventor： MAKINO YOSHIMI ,  HAYAKAWA MASATOSHI ,  ASO KOICHI ,  UEDAIRA SATORU ,  ITO SHIGEYASU ,  HOTAI KAZUHIDE

IPC: C22F1/00 ,  C21D1/04 ,  C22C45/04 ,  H01F1/153 ,  H01F1/00

Abstract: A method of manufacturing a high permeability amorphous magnetic alloy is disclosed. In the method amorphous magnetic alloy ribbon prepared by quenching a melt of raw material is annealed at an elevated temperature lower than a crystallization temperature of the alloy, in a magnetic field. During the annealing, the alloy ribbon and a direction of the magnetic field is relatively rotated with each other. The method is especially useful to an amorphous magnetic alloy having high saturation magnetic induction where a magnetic Curie temperature of the alloy usually exceeds the crystallization temperature of the alloy.