KR930006665A - Magneto-optical recording media - Google Patents

Magneto-optical recording media Download PDF

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Publication number
KR930006665A
KR930006665A KR1019910016669A KR910016669A KR930006665A KR 930006665 A KR930006665 A KR 930006665A KR 1019910016669 A KR1019910016669 A KR 1019910016669A KR 910016669 A KR910016669 A KR 910016669A KR 930006665 A KR930006665 A KR 930006665A
Authority
KR
South Korea
Prior art keywords
magneto
optical recording
short
recording medium
recording media
Prior art date
Application number
KR1019910016669A
Other languages
Korean (ko)
Other versions
KR940001238B1 (en
Inventor
김진홍
Original Assignee
이헌조
주식회사 금성사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019910016669A priority Critical patent/KR940001238B1/en
Publication of KR930006665A publication Critical patent/KR930006665A/en
Application granted granted Critical
Publication of KR940001238B1 publication Critical patent/KR940001238B1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • 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

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Thin Magnetic Films (AREA)

Abstract

본 발명은 광자기 기록매체에 관한 것으로, 일반적으로 제조되고 있는 기존 광자기 기록매체는 희토류-천이근속 합금 재료중에 TbFeCo를 사용하나 희토류가 산소 친화력에 큰 문제가 있어 보호막이 있더라도 완벽한 보호를 하지 못할 뿐만이 아니라 시간에 따른 열화가 문제가 된다. 또한 상기 재료는 상파장 광원에서만 큰 신호를 얻을 수 있기 때문에 단파자 대역(400∼600㎚)에서는 CNR이 작아서 기록 밀도를 높이는데 한계가 있게된다. 이에 따라 본 발명은 단파장 영역에서도 높은 커 회전각이 얻어지도록 단파장용 광자기 기록 매체로 NdPdCoFe, NdPtCoFe 또는 NdPdPtCoFe를 사용하여 기록 밀도를 향상시킨 것이다.The present invention relates to a magneto-optical recording medium. In general, conventional magneto-optical recording media manufactured using TbFeCo in rare earth-transition-continuous alloying materials, but rare earths have a great problem in oxygen affinity, thus failing to provide perfect protection even if they have a protective film. In addition, deterioration with time becomes a problem. In addition, since the material can obtain a large signal only from an upper wavelength light source, the CNR is small in the short wave band (400 to 600 nm), which limits the recording density. Accordingly, the present invention improves the recording density by using NdPdCoFe, NdPtCoFe, or NdPdPtCoFe as the short-wavelength magneto-optical recording medium so that a high Kerr rotation angle is obtained even in the short wavelength region.

Description

광 자기 기록 매체Magneto-optical recording media

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

제2도는 본 발명에 따른 기록매체의 파장 의존도.2 is a wavelength dependence of a recording medium according to the present invention.

Claims (2)

기록중의 조성이 NdPdCo, NdPtCo, NdPdCoFe, NdPtCoFe 또는 NdPdPtCoFe중 어느 하나인 것을 특징으로 하는 광자기 기록매체.A magneto-optical recording medium, wherein the composition during recording is any one of NdPdCo, NdPtCo, NdPdCoFe, NdPtCoFe, or NdPdPtCoFe. 제1항에 있어서, NdPdCo, NdPtCo는 (NdxCo1-x)1-yPdy, (NdxCo1-x)1-yPty에서, 및 y의 값이 0.1≤x≤0.4, 0.5≤y≤0.8의 조성인 것을 특징으로 하는 광자기 기록매체.The method of claim 1, wherein NdPdCo, NdPtCo is (Nd x Co 1-x ) 1-y Pdy, (Nd x Co 1-x ) 1-y Pt y , and the value of y is 0.1 ≦ x ≦ 0.4, 0.5 Magneto-optical recording medium, characterized in that the composition of ≤ y ≤ 0.8. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910016669A 1991-09-25 1991-09-25 Optical recording material KR940001238B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910016669A KR940001238B1 (en) 1991-09-25 1991-09-25 Optical recording material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910016669A KR940001238B1 (en) 1991-09-25 1991-09-25 Optical recording material

Publications (2)

Publication Number Publication Date
KR930006665A true KR930006665A (en) 1993-04-21
KR940001238B1 KR940001238B1 (en) 1994-02-18

Family

ID=19320299

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910016669A KR940001238B1 (en) 1991-09-25 1991-09-25 Optical recording material

Country Status (1)

Country Link
KR (1) KR940001238B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7958526B2 (en) 1997-01-22 2011-06-07 The Nielsen Company (Us), Llc Source detection apparatus and method for audience measurement
US10387618B2 (en) 2006-07-12 2019-08-20 The Nielsen Company (Us), Llc Methods and systems for compliance confirmation and incentives
US10469901B2 (en) 2008-10-31 2019-11-05 The Nielsen Company (Us), Llc Methods and apparatus to verify presentation of media content

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7958526B2 (en) 1997-01-22 2011-06-07 The Nielsen Company (Us), Llc Source detection apparatus and method for audience measurement
US8434100B2 (en) 1997-01-22 2013-04-30 The Nielsen Company (Us) Llc Source detection apparatus and method for audience measurement
US10387618B2 (en) 2006-07-12 2019-08-20 The Nielsen Company (Us), Llc Methods and systems for compliance confirmation and incentives
US11741431B2 (en) 2006-07-12 2023-08-29 The Nielsen Company (Us), Llc Methods and systems for compliance confirmation and incentives
US10469901B2 (en) 2008-10-31 2019-11-05 The Nielsen Company (Us), Llc Methods and apparatus to verify presentation of media content
US11070874B2 (en) 2008-10-31 2021-07-20 The Nielsen Company (Us), Llc Methods and apparatus to verify presentation of media content
US11778268B2 (en) 2008-10-31 2023-10-03 The Nielsen Company (Us), Llc Methods and apparatus to verify presentation of media content

Also Published As

Publication number Publication date
KR940001238B1 (en) 1994-02-18

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