KR930008755A - Magneto-optical recording device - Google Patents

Magneto-optical recording device Download PDF

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KR930008755A
KR930008755A KR1019920019808A KR920019808A KR930008755A KR 930008755 A KR930008755 A KR 930008755A KR 1019920019808 A KR1019920019808 A KR 1019920019808A KR 920019808 A KR920019808 A KR 920019808A KR 930008755 A KR930008755 A KR 930008755A
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magnetic
single crystal
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magnetic head
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KR0139315B1 (en
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가쯔요시 이시이
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야마지 게이조
캐논 가부시기가이샤
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/133—Structure or manufacture of heads, e.g. inductive with cores composed of particles, e.g. with dust cores, with ferrite cores with cores composed of isolated magnetic particles

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  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

광자기기록장치는, 광자기기록매체를 광학빔으로 조사하는 광학헤드와, 자계를 기록매체에 인가하는 자기헤드를 구비하고, 자기헤드의 코어는 단결정 페라이트재료로 되어 있다. 자기헤드의 코어의 주극부를 형성하는 단결 정페라이트의 자기이방성을 근거로하여 용이한 자화방향이, 광자기기록매체에 인가된 자계의 방향과 거의 일치하거나 자기헤드의 코어의 코일권선부에 있는 코일에 의해서 발생하는 자화의 방향과 거의 일치하도록 배치되어 있다.The magneto-optical recording apparatus includes an optical head for irradiating an optical magnetic recording medium with an optical beam, and a magnetic head for applying a magnetic field to the recording medium, and the core of the magnetic head is made of a single crystal ferrite material. On the basis of the magnetic anisotropy of the unitary crystalline ferrite forming the main electrode portion of the core of the magnetic head, the easy magnetization direction coincides with the direction of the magnetic field applied to the magneto-optical recording medium, or the coil in the coil winding of the core of the magnetic head. It is arrange | positioned so that it may substantially correspond with the direction of the magnetization which arises.

Description

광자기기록장치Magneto-optical recording device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 2 도는 본 발명의 제1실시예에 관한 광자기기록장치의 주요부분을 개략적으로 도시한 측면도,2 is a side view schematically showing a main part of the magneto-optical recording apparatus according to the first embodiment of the present invention;

제 3 도a와 제 3 b도는 본 발명의 다른 실시예에 관한 주요부분을 개략적으로 도시한 측면도,3a and 3b are side views schematically showing main parts of another embodiment of the present invention;

제 4 도는 본 발명의 또다른 실시예에 관한 주요부분을 개략적으로 도시한 측면도,4 is a side view schematically showing a main part of another embodiment of the present invention;

제 5 도는 본 발명의 또다른 실시예에 관한 주요부분을 개략적으로 도시한 측면도.5 is a side view schematically showing a main part of another embodiment of the present invention.

Claims (22)

광자기기록매체에 광학빔을 조사하는 광학헤드와, 자계를 기록매체에 인가하는 자기헤드를 구비하고, 상기 자기헤드의 코어는 단결정페라이트재료로 된 것을 특징으로 하는 광자기기록장치.And an optical head for irradiating an optical beam to an optical magnetic recording medium, and a magnetic head for applying a magnetic field to the recording medium, wherein the core of the magnetic head is made of a single crystal ferrite material. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 주극부를 형성하는 상기 단결정페라이트재료의 자기이방성을 근거로 하여 용이한 자화방향이, 상기 광장기기록매체에 인가된 상기 자계의 방향과 일치하도록 배치된 것을 특징으로 하는 광자기기록장치.A magnetization direction according to claim 1, wherein an easy magnetization direction is arranged to coincide with the direction of the magnetic field applied to the spectroscopic recording medium based on the magnetic anisotropy of the single crystal ferrite material forming the main electrode portion of the core of the magnetic head. Magneto-optical recording device characterized in that. 제 1항에 있어서, 상기 코어를 형성하는 상기 단결정페라이트재료의 자기이방성을 근거로 하여 용이한 자화방향이, 상기 자기헤드의 상기 코어의 코일권선부에 있는 코일에 의해서 발생하는 자화의 방향과 일치하도록 배치된 것을 특징으로 하는 광자기기록장치.2. The magnetization direction which is easy based on the magnetic anisotropy of the single crystal ferrite material forming the core coincides with the direction of magnetization generated by the coil in the coil winding of the core of the magnetic head. A magneto-optical recording device, characterized in that arranged to. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 주극부는, MnO·ZnO·Fe2O3를 주성분으로 함유하는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상온에서 0보다 큰 제1자기이방성상수(K1)를 가지고, 상기 자계의 방향과 일치하는 결정축 <100>을 가지는 것을 특징으로 하는 광자기기록장치.2. The magnetic pole according to claim 1, wherein the main electrode portion of the core of the magnetic head is made of cubic single crystal ferrite containing MnO.ZnO.Fe 2 O 3 as a main component, and the single crystal has a first magnetic anisotropy constant greater than zero at room temperature. has a (K 1), a magneto-optical recording apparatus which is characterized by having a crystal axis <100>, which matches the direction of the magnetic field. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 주극부는, Fe2O3의 성분비율이 60mol%이하인 MnO·ZnO·Fe2O3를 주성분으로 함유하는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상온에서 0보다 작은 제1자기이방성상수(K1)를 가지고, 상기 자계의 방향과 일치하는 결정축 <111>을 가지는 것을 특징으로 하는 광자기기록장치.The main electrode portion of the core of the magnetic head is made of a cubic single crystal ferrite containing MnO.ZnO.Fe 2 O 3 as a main component having a component ratio of Fe 2 O 3 of 60 mol% or less. And a first magnetic anisotropy constant (K 1 ) of less than zero at room temperature and having a crystal axis coinciding with the direction of the magnetic field. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 여자코일권선부는, MnO·ZnO·Fe2O3를 주성분으로 함유하는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상온에서 0보다 큰 제1자기이방성상수(K1)를 가지고, 상기 권선부의 주위에 권선된 여자코일에 의해서 발생되는 여자의 방향과 일치하는 결정축 <100>을 가지는 것을 특징으로 하는 광자기기록장치.The magnetic coil winding portion of the core of the magnetic head is made of a cubic single crystal ferrite containing MnO.ZnO.Fe 2 O 3 as a main component, and the single crystal is a first magnetic material larger than zero at room temperature. The magneto-optical recording device having an anisotropic constant (K 1 ) and having a crystal axis coinciding with the direction of excitation generated by the excitation coil wound around the winding portion. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 여자코일권선부는, Fe2O3의 성분비율이 60mol%이하인 MnO·ZnO·Fe2O3를 주성분으로 함유하는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상온에서 0보다 작은 제1자기이방성상수(K1)를 가지고, 상기 권선부의 주위에 권선된 여자코일에 의해서 발생되는 여자의 방향과 일치하는 결정축 <111>을 가지는 것을 특징으로 하는 광자기기록장치.The excitation coil winding portion of the core of the magnetic head is made of cubic single crystal ferrite containing MnO.ZnO.Fe 2 O 3 as a main component having a component ratio of Fe 2 O 3 or less. The single crystal has a first magnetic anisotropy constant (K 1 ) of less than zero at room temperature, and has a crystal axis coincident with the direction of excitation generated by the excitation coil wound around the winding part. Magnetic recording device. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 주극부는, MnO·ZnO·Fe2O3를 주성분으로 함유하고, 또한 상온 이상의 온도에서 투자율의 제1피크가 나타나고 상온 이하의 온도에서 투자율의 제2피크가 나타나는 투자율의 온도의존성을 가지는 입방단결정페라이트로 이루어지고, 상기 단결정은 상기 자계의 방향과 일치하는 결정축<100>을 가지는 것을 특징으로 하는 광자기기록장치.A magnetic permeability according to claim 1, wherein the main electrode portion of the core of the magnetic head contains MnO.ZnO.Fe 2 O 3 as a main component and exhibits a first peak of permeability at a temperature higher than or equal to room temperature. And a cubic single crystal ferrite having a temperature dependence of magnetic permeability of 2 peaks, wherein the single crystal has a crystal axis <100> coincident with the direction of the magnetic field. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 여자코일권선부는, MnO·ZnO·Fe2O3를 주성분으로 함유하고, 또한 상온 이상의 온도에서 투자율의 제1피크가 나타나고 상온 이하의 온도에서 투자율의 제2피크가 나타나는 투자율의 온도의존성을 가지는 입방단결정페라이트로 이루어지고, 상기 단결정은 상기 자계의 방향과 일치하는 결정축<100>을 가지는 것을 특징으로 하는 광자기기록장치.The magnetic coil winding portion of the core of the magnetic head contains MnO.ZnO.Fe 2 O 3 as a main component, and has a first peak of permeability at a temperature higher than or equal to room temperature. And a cubic single crystal ferrite having a temperature dependence of magnetic permeability at which the second peak appears, the single crystal having a crystal axis <100> coincident with the direction of the magnetic field. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 주극부는, MnO·ZnO·Fe2O3를 주성분으로 함유하고, 또한 상온 이상의 온도에서 투자율의 제1피크와 제2피크가 모두 나타나는 투자율의 온도의존성을 가지는 입방단결정페라이트로 이루어지고, 상기 단결정은 상기 자계방향과 일치하는 결정축<111>을 가지는 것을 특징으로 하는 광자기기록장치.2. The magnetic permeability of claim 1, wherein the main electrode portion of the core of the magnetic head contains MnO.ZnO.Fe 2 O 3 as a main component and has a permeability at which the first and second peaks of the magnetic permeability appear at temperatures above room temperature. And a cubic single crystal ferrite having a dependency, wherein the single crystal has a crystal axis <111> coinciding with the magnetic field direction. 제 1항에 있어서, 상기 자기헤드의 상기 코어의 여자코일권선부는, MnO·ZnO·Fe2O3를 주성분으로 함유하고, 또한 상온 이상의 온도에서 투자율의 제1피크와 제2피크가 모두 나타나는 투자율의 온도의존성을 가지는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상기 여자코일권선부에서 여자의 방향과 일치하는 결정축<111>을 가지는 것을 특징으로 하는 광자기기록장치.2. The magnetic permeability winding portion of the core of the magnetic head according to claim 1, wherein the magnetic coil winding portion contains MnO.ZnO.Fe 2 O 3 as a main component and exhibits both a first peak and a second peak of permeability at a temperature higher than or equal to room temperature. And a cubic single crystal ferrite having a temperature dependency of?, Wherein the single crystal has a crystal axis <111> coinciding with the direction of the excitation in the excitation coil winding portion. 광자기기록매체에 자계를 인가하는 광자기기록장치에 있어서, 광자기기록매체에 자계를 인가하는 자기헤드를 구비하고, 상기 자기헤드의 코어는 단결정 페라이트재료로 된 것을 특징으로 하는 광자기기록장치.A magneto-optical recording device for applying a magnetic field to a magneto-optical recording medium, comprising: a magnetic head for applying a magnetic field to the magneto-optical recording medium, wherein the core of the magnetic head is made of a single crystal ferrite material. . 제12항에 있어서, 상기 자기헤드의 상기 코어의 주극부를 형성하는 상기 단결정페라이트재료의 자기이방성을 근거로 하여 용이한 자화방향이, 상기 광자기매체에 인가된 상기 자계의 방향과 일치되도록 배치된 것을 특징으로 하는 광자기기록장치.13. The magnetization direction as set forth in claim 12, wherein an easy magnetization direction is arranged to coincide with the direction of the magnetic field applied to the magneto-optical medium based on the magnetic anisotropy of the single crystal ferrite material forming the main electrode portion of the core of the magnetic head. Magneto-optical recording device, characterized in that. 제12항에 있어서, 상기 코어를 형성하는 상기 단결정페라이트재료의 자기이방성을 근거로 하여 용이한 자화방향이 상기 자기헤드의 상기 코어의 코일권선부에 있는 코일에 의해서 발생하는 자화의 방향과 일치되도록 배치된 것을 특징으로 하는 광자기기록장치.13. The method according to claim 12, wherein the easy magnetization direction is coincident with the direction of magnetization generated by the coil in the coil winding of the core of the magnetic head based on the magnetic anisotropy of the single crystal ferrite material forming the core. Magneto-optical recording device, characterized in that arranged. 제12항에 있어서, 상기 자기헤드의 상기 코어의 주극부는, MnO·ZnO·Fe2O3를 주성분으로 함유하는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상온에서 0보다 큰 제1자기이방성상수(K1)를 가지고, 상기 자계의 방향과 일치하는 결정축 <100>을 가지는 것을 특징으로 하는 광자기기록장치.13. The magnetic pole according to claim 12, wherein the main electrode portion of the core of the magnetic head is made of cubic single crystal ferrite containing MnO.ZnO.Fe 2 O 3 as a main component, and the single crystal has a first magnetic anisotropy constant greater than zero at room temperature. has a (K 1), a magneto-optical recording apparatus which is characterized by having a crystal axis <100>, which matches the direction of the magnetic field. 제12항에 있어서, 상기 자기헤드의 상기 코어의 주극부는, Fe2O3의 성분비율이 60mol%이하인 MnO·ZnO·Fe2O3를 주성분으로 함유하는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상온에서 0보다 작은 제1자기이방성상수(K1)를 가지고, 상기 자계의 방향과 일치하는 결정축 <111>을 가지는 것을 특징으로 하는 광자기기록장치.The main electrode portion of the core of the magnetic head is formed of a cubic single crystal ferrite containing MnO.ZnO.Fe 2 O 3 as a main component having a component ratio of Fe 2 O 3 of 60 mol% or less. And a first magnetic anisotropy constant (K 1 ) of less than zero at room temperature and having a crystal axis coinciding with the direction of the magnetic field. 제12항에 있어서, 상기 자기헤드의 상기 코어의 여자코일권선부는, MnO·ZnO·Fe2O3를 주성분으로 함유하는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상온에서 0보다 큰 제1자기이방성상수(K1)를 가지고, 상기 권선부의 주위에 권선된 여자코일에 의해서 발생되는 여자의 방향과 일치하는 결정축 <100>을 가지는 것을 특징으로 하는 광자기기록장치.13. The magnetic coil winding portion of the core of the magnetic head is made of a cubic single crystal ferrite containing MnO.ZnO.Fe 2 O 3 as a main component, and the single crystal is a first magnetic material larger than zero at room temperature. The magneto-optical recording device having an anisotropic constant (K 1 ) and having a crystal axis coinciding with the direction of excitation generated by the excitation coil wound around the winding portion. 제12항에 있어서, 상기 자기헤드의 상기 코어의 여자코일권선부는, Fe2O3의 성분비율이 60mol%이하인 MnO·ZnO·Fe2O3를 주성분으로 함유하는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상온에서 0보다 작은 제1자기이방성상수(K1)를 가지고, 상기 권선부의 주위에 권선된 여자코일에 의해서 발생되는 여자의 방향과 일치하는 결정축 <111>을 가지는 것을 특징으로 하는 광자기기록장치.The magnetic coil winding portion of the core of the magnetic head is made of a cubic single crystal ferrite containing MnO.ZnO.Fe 2 O 3 as a main component having a component ratio of Fe 2 O 3 of 60 mol% or less. The single crystal has a first magnetic anisotropy constant (K 1 ) of less than zero at room temperature, and has a crystal axis coincident with the direction of excitation generated by the excitation coil wound around the winding part. Magnetic recording device. 제12항에 있어서, 상기 자기헤드의 상기 코어의 주극부는, MnO·ZnO·Fe2O3를 주성분으로 함유하고, 또한 상온 이상의 온도에서 투자율의 제1피크가 나타나고 상온 이하의 온도에서 투자율의 제2피크가 나타나는 투자율의 온도의존성을 가지는 입방단결정페라이트로 이루어지고, 상기 단결정은 상기 자계의 방향과 일치하는 결정축<100>을 가지는 것을 특징으로 하는 광자기기록장치.The magnetic pole portion of the magnetic head according to claim 12, wherein the main electrode portion of the core of the magnetic head contains MnO.ZnO.Fe 2 O 3 as a main component and exhibits a first peak of permeability at a temperature higher than or equal to room temperature. And a cubic single crystal ferrite having a temperature dependence of magnetic permeability of 2 peaks, wherein the single crystal has a crystal axis <100> coincident with the direction of the magnetic field. 제12항에 있어서, 상기 자기헤드의 상기 코어의 여자코일권선부는, MnO·ZnO·Fe2O3를 주성분으로 함유하고, 또한 상온 이상의 온도에서 투자율의 제1피크가 나타나고 상온 이하의 온도에서 투자율의 제2피크가 나타나는 투자율의 온도의존성을 가지는 입방단결정페라이트로 이루어지고, 상기 단결정은 상기 자계의 방향과 일치하는 결정축<100>을 가지는 것을 특징으로 하는 광자기기록장치.The magnetic coil winding portion of the core of the magnetic head contains MnO.ZnO.Fe 2 O 3 as a main component, and the magnetic permeability is exhibited at a temperature below the room temperature. And a cubic single crystal ferrite having a temperature dependence of magnetic permeability at which the second peak appears, the single crystal having a crystal axis <100> coincident with the direction of the magnetic field. 제12항에 있어서, 상기 자기헤드의 상기 코어의 주극부는, MnO·ZnO·Fe2O3를 주성분으로 함유하고, 또한 상온 이상의 온도에서 투자율의 제1피크와 제2피크가 모두 나타나는 투자율의 온도의존성을 가지는 입방단결정페라이트로 이루어지고, 상기 단결정은 상기 자계방향과 일치하는 결정축<111>을 가지는 것을 특징으로 하는 광자기기록장치.13. The magnetic permeability of claim 12, wherein the main electrode of the core of the magnetic head contains MnO.ZnO.Fe 2 O 3 as a main component and has a permeability at which the first and second peaks of the permeability appear at temperatures above room temperature. And a cubic single crystal ferrite having a dependency, wherein the single crystal has a crystal axis <111> coinciding with the magnetic field direction. 제12항에 있어서, 상기 자기헤드의 상기 코어의 여자코일권선부는, MnO·ZnO·Fe2O3를 주성분으로 함유하고, 또한 상온 이상의 온도에서 투자율의 제1피크와 제2피크가 모두 나타나는 투자율의 온도의존성을 가지는 입방단결정페라이트로 이루어지고, 상기 단결정은, 상기 여자코일권선부에서 여자의 방향과 일치하는 결정축<111>을 가지는 것을 특징으로 하는 광자기기록장치.13. The magnetic permeability winding portion of the core of the magnetic head according to claim 12, which contains MnO.ZnO.Fe 2 O 3 as a main component and has a magnetic permeability in which both the first peak and the second peak appear at temperatures above room temperature. And a cubic single crystal ferrite having a temperature dependency of?, Wherein the single crystal has a crystal axis <111> coinciding with the direction of the excitation in the excitation coil winding portion. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920019808A 1991-10-28 1992-10-27 Magneto-optical recording device Expired - Fee Related KR0139315B1 (en)

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