JPS6387633A - Magneto-optical recording medium - Google Patents
Magneto-optical recording mediumInfo
- Publication number
- JPS6387633A JPS6387633A JP23290386A JP23290386A JPS6387633A JP S6387633 A JPS6387633 A JP S6387633A JP 23290386 A JP23290386 A JP 23290386A JP 23290386 A JP23290386 A JP 23290386A JP S6387633 A JPS6387633 A JP S6387633A
- Authority
- JP
- Japan
- Prior art keywords
- magneto
- optical recording
- recording material
- recording medium
- durability
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000011651 chromium Substances 0.000 claims abstract description 17
- 239000010936 titanium Substances 0.000 claims abstract description 16
- 239000010409 thin film Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 5
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 5
- 239000010941 cobalt Substances 0.000 claims abstract description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 5
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 239000010408 film Substances 0.000 description 17
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 7
- 229910002058 ternary alloy Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Thin Magnetic Films (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は光磁気ディスク、テープ、カード等のレーザー
ビームを用いて情報を高密度に記録するのに用いられる
光磁気記録媒体に関するものであり、特にテルビウム、
鉄およびコバルトより成る３元素光磁気記録材の改良に
関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a magneto-optical recording medium used for recording information at high density using a laser beam, such as a magneto-optical disk, tape, or card. , especially terbium,
This invention relates to the improvement of a three-element magneto-optical recording material made of iron and cobalt.
（発明の背景）
希土類−遷移金属（Ｒ−Ｔ）より成るアモルファス合金
薄膜を有する光磁気記録媒体にレーザービームを用いて
熱−磁気記録し、光−磁気再生することは既に周知であ
る。上記Ｒ−Ｔ膜としてはＴ ｂＦ ｅ、 Ｇ ｄＴ
ｂＦ ｅ、Ｔ ｂＦ ｅＣｏ等が提案されており、実験
室レベルでは既に十分な性能のものが作られている。光
磁気記録方式の実用化上の最大の問題点は記録媒体の耐
久性である。すなわち、上記アモルファス合金薄膜は空
気中の酸素、水分によって酸化され易いため、記録膜の
性質が時間の経過とともに変化する。そのため、記録膜
の記録−再生特性が経時変化し、この変化が許容限度を
超えると、最悪の場合には記録・再生が不可能になる。(Background of the Invention) It is already well known that a laser beam is used to perform thermo-magnetic recording and optical-magnetic reproduction on a magneto-optical recording medium having an amorphous alloy thin film made of rare earth-transition metals (RT). The above RT film is T bF e, G dT
bF e, T bF eCo, etc. have been proposed, and those with sufficient performance have already been produced at the laboratory level. The biggest problem in putting magneto-optical recording into practical use is the durability of the recording medium. That is, since the amorphous alloy thin film is easily oxidized by oxygen and moisture in the air, the properties of the recording film change over time. Therefore, the recording/reproducing characteristics of the recording film change over time, and if this change exceeds a permissible limit, in the worst case, recording/reproducing becomes impossible.
従って、耐久性に優れたＲ−Ｔアモルファス光磁気記録
膜の開発が強く望まれている。Therefore, the development of an RT amorphous magneto-optical recording film with excellent durability is strongly desired.
上記問題点を解決する、すなわち記録膜の耐久性を向上
させる対策としては２つの方法があり、一つは保護膜を
用いる方法であり、他はＲ−Ｔ合金の組成そのものの耐
久性を向上させる方法であり、本発明は後者の場合であ
る。There are two methods to solve the above problems, that is, to improve the durability of the recording film. One is to use a protective film, and the other is to improve the durability of the composition of the RT alloy itself. The present invention applies to the latter case.
（従来技術）
耐久性を向上させた光磁気記録材用Ｒ−Ｔ合金組成に関
しては既に種々のアイデアが提案されている。例えば特
開昭５９−１６８９５３号ではＧ ｄＴ ｂＦ ｅＣｏ
にＳｌを０．１〜３０原子％添加している。また、Ｒ−
Ｔ合金組成に耐久性を向上させるための他の成分を添加
することに関した研究報告としては「電気学会研究会資
料−マグネティック研究会」（昭６０年）のＭＡＧ−８
５−８０およ＝３−
びＭＡＧ−８５−８１がある。前者ではＡ １． Ｃｒ
。(Prior Art) Various ideas have already been proposed regarding compositions of RT alloys for magneto-optical recording materials with improved durability. For example, in JP-A-59-168953, G dT bF eCo
0.1 to 30 atomic % of Sl is added to. Also, R-
A research report on the addition of other components to the T alloy composition to improve durability is MAG-8 in "IEEJ Study Group Materials - Magnetic Study Group" (1986).
There are 5-80, 3-3 and MAG-85-81. In the former case, A1. Cr
.
Ｔｉ、Ｍｏの添加効果が記載されており、後者でもＣｒ
、Ｃｕ、Ａｇ、Ａ １．Ｓ ｂ、Ａ １．Ｍｏの添加効
果が記載されている。本発明はこれらの研究の延長上に
ある。The effects of adding Ti and Mo are described, and even in the latter case, Cr
, Cu, Ag, A 1. S b, A 1. The effect of adding Mo is described. The present invention is an extension of these studies.
（発明の目的）
本発明の目的は耐久性の面で実用に十分耐え得ると同時
に記録−再生特性に優れた光磁気記録媒体を提供するこ
とにある。特に、本発明はＴｂＦｅＣｏの３元系光磁気
記録材の耐久性を向上させることにある。(Objective of the Invention) An object of the present invention is to provide a magneto-optical recording medium which is sufficiently durable for practical use and has excellent recording-reproducing characteristics. In particular, the present invention aims to improve the durability of a TbFeCo ternary magneto-optical recording material.
（発明の構成）
本発明の特徴は基板と、この基板上に直接または保護層
／エンハンス層を介して形成されたテルビウム（Ｔｂ）
、鉄（Ｆｅ）およびコバルト（Ｃｏ）より成る光磁気記
録材の薄膜とを有する光磁気記録媒体において、上記光
磁気記録材にチタン（Ｔ ｉ）およびクロム（Ｃｒ）よ
り成る群から選択された少なくとも一つの元素を２〜６
原子％添加することにある。(Structure of the Invention) The present invention is characterized by a substrate and a terbium (Tb) layer formed directly or through a protective layer/enhancement layer on the substrate.
, a magneto-optical recording medium comprising a thin film of a magneto-optical recording material made of iron (Fe) and cobalt (Co), wherein the magneto-optical recording material is selected from the group consisting of titanium (Ti) and chromium (Cr). 2 to 6 of at least one element
The purpose is to add atomic percent.
上記基板はガラス、セラミックス、プラスチック、金属
等任意の材料から作ることができるが、生産性、コスト
等から透明プラスチック、特にポリカーボネートが好ま
しい。アクリル樹脂の場合には吸水性が高く、Ｒ−Ｔ合
金膜の酸化を促進するので、保護膜を用いるのが望まし
い。The substrate can be made of any material such as glass, ceramics, plastic, or metal, but transparent plastic, particularly polycarbonate, is preferred from the viewpoint of productivity and cost. In the case of acrylic resin, it is desirable to use a protective film because it has high water absorption and promotes oxidation of the RT alloy film.
光磁気記録材としては種々のＲ−Ｔの組合せが公知であ
るが、本発明はＴｂ−Ｆｅ−Ｃｏの三元系合金をベース
として用いる。この３元系合金の組成は主として記録−
再生特性の観点から決められる。各成分の比率は特に限
定されないが、本発明の好ましい３元系合金の組成とし
ては以下のようなものが挙げられる
Ｔ ｂ ２１ （Ｆ ｅ ｓ ５ＣＯ＋ ５） ７９Ｔ
Ｌｓ （Ｆ ｅｅ３ｃ ０７ ）７５Ｔ Ｌ７（Ｆ
ｅｓｓＣ０１１）７３
Ｔ ｂ２ｓ （Ｆ ｅｓｓＣ０１７）？＋一般的にはベ
ースとなる３元系合金は下記式で表わすことができる・
Ｔ ｂｙ （Ｆ ｅｔｏｏ−ｚＣｏｚ）１００−ｙこ
こで、ｙは２０〜３０
Ｚは５〜２０
である。Although various RT combinations are known as magneto-optical recording materials, the present invention uses a ternary alloy of Tb-Fe-Co as a base. The composition of this ternary alloy is mainly recorded.
It is determined from the viewpoint of playback characteristics. Although the ratio of each component is not particularly limited, preferred compositions of the ternary alloy of the present invention include the following: T b 21 (Fe s 5CO+ 5) 79T
Ls (Fee3c 07)75T L7(F
essC011)73 T b2s (F essC017)? +Generally, the base ternary alloy can be represented by the following formula: T by (F etoo-zCoz)100-y where y is 20 to 30 and Z is 5 to 20.
本発明の特徴は上記の３元系合金にＴｉおよび／または
Ｃｒを合計で２〜６原子％添加して、４元系または５元
系の合金としたものを光磁気記録材として用いる点にあ
る。The feature of the present invention is that a total of 2 to 6 atomic percent of Ti and/or Cr is added to the above ternary alloy to form a quaternary or quinary alloy, which is used as a magneto-optical recording material. be.
従って、本発明の光磁気記録材は下記一般式で表わされ
る：
［Ｔ ｂｙ （Ｆ ｅｌｏｏ−ｚＣｏｚ）１００
−ｙ］１００−、Ｍ Ｘここで、ＭはＴｉおよび／また
はＣｒ
ｘ＝２ 〜６
ｙ−２０〜３０
ｚ＝５ 〜２０
上記元素の添加によって耐久性−耐酸化性、耐食性−が
向上する理由は一般に不働態が膜表面に形成されるため
であると考えられている （前記ＭＧ−８５−８０参照
）
上記Ｔｉ、Ｃｒの合計添加量が２原子％未満では耐久性
の効果がなく、６原子％を超えるとＣＮＲ。Therefore, the magneto-optical recording material of the present invention is represented by the following general formula: [T by (F eloo-zCoz)100
-y]100-, M X where M is Ti and/or Cr The reason is generally considered to be that a passive state is formed on the film surface (see MG-85-80 above).If the total amount of Ti and Cr added is less than 2 at%, there is no effect on durability. CNR when it exceeds 6 atomic%.
ＢＥＲ等の記録−再生特性が時間の経過とともに低下し
、ともに実用にならない。Recording-reproduction characteristics such as BER deteriorate over time, making both impractical.
以下、実施例を用いて本発明を説明する。The present invention will be explained below using Examples.
（実施例）
射出成形によって成形した直径１３０ ｍｍ、厚さ１．
２ｍｍのポリカーボネート製基板をスパッタリング装置
（日本真空製）にセットし、到達真空度＝ ５ Ｘ １
０−’Ｔｏｒｒ、スパッター（Ａｒ）圧カーフ×１０−
３Ｔ ｏｒｒ、スパッタ電力＝１４０Ｗで、各種組成の
ターゲットを用いて上記基板上に膜厚的１．０００人の
磁性薄膜を形成した。(Example) Molded by injection molding, diameter 130 mm, thickness 1.
A 2 mm polycarbonate substrate was set in a sputtering device (manufactured by Nippon Vacuum), and the ultimate vacuum level was 5 x 1.
0-' Torr, sputter (Ar) pressure kerf x 10-
A magnetic thin film with a film thickness of 1.000 mm was formed on the above substrate using targets of various compositions at 3 Torr and sputtering power = 140 W.
上記ターゲットとしてはＴ ｂ２５（Ｆ ｅｅｏｃ ｒ
＋ｏ）７ｓの合金ターゲット上に所定数のＣｒおよび／
またはＴｉのチップを置いたものを使用した。スパッタ
ー後の薄膜の組成はターゲットの組成とほぼ同じである
ことが分析結果かられかっている。The above target is T b25 (Feeoc r
+o) Predetermined number of Cr and/or on 7s alloy target
Alternatively, one with a Ti chip placed thereon was used. Analysis results show that the composition of the thin film after sputtering is almost the same as that of the target.
得られた磁性薄膜の評価はピンホール数（Ｎ）の増加率
（Ｎ／Ｎｂ、Ｎｂは初期値）とＢＥＲ変化率（Ｂ Ｅ
Ｒ／ Ｂ Ｅ Ｒｏ 、 Ｂ Ｅ Ｒｏは初期値）の６
０°Ｃ９９０％ＲＨ下での経時変化により行った。The obtained magnetic thin film was evaluated based on the rate of increase in the number of pinholes (N) (N/Nb, Nb is the initial value) and the rate of change in BER (B E
R/B E Ro, B E Ro is the initial value) 6
The test was carried out over time at 0°C and 990% RH.
第１図は上記チップとしてＴｉを用いた場合のヒ０ンホ
ール蚊
か≠嘲の変化（Ｎ ／ Ｎ ｂ）を６０℃、９０％ＲＨ
下での保持時間（時）で示したものである。第２図は同
じ＜ ＢＥＲの変化（ＢＥＲ／ＢＥＲ０・・初期値に対
する変化率）を示したものである。第１．２電力１ら明
らかなようにＴｉ添加の場合、最適添加量は２〜６原子
％である。Figure 1 shows the change (N/Nb) in the case of using Ti as the above-mentioned chip at 60℃ and 90%RH.
The retention time (hours) is shown below. FIG. 2 shows the change in BER (BER/BER0... rate of change with respect to the initial value). As is clear from No. 1.2 Power 1, in the case of Ti addition, the optimum addition amount is 2 to 6 atomic %.
第３図および第４図は上記チップとしてＣｒを用いた場
合の第１図および第２図に各々対応する図であり、Ｃｒ
の場合にも実用上の添加量は６原子％であることがわか
る。FIGS. 3 and 4 are diagrams corresponding to FIGS. 1 and 2, respectively, when Cr is used as the chip, and Cr
It can be seen that the practical addition amount is 6 atomic % even in the case of .
（比較例１）
上記ＴｉおよびＣｒを添加しない場合につし）で実施例
と同じ方法で光ディスクを製造し、評価を行った。結果
は第５図および第６図に示しである。(Comparative Example 1) An optical disc was manufactured in the same manner as in the example without adding Ti and Cr, and evaluated. The results are shown in FIGS. 5 and 6.
これら添加物を加えない場合には膜の劣化が止らないこ
とを示している。This shows that the deterioration of the membrane does not stop when these additives are not added.
（比較例２）
第４成分としてＡ１を用いた場合について実施した。成
膜法および評価法は実施例と同じである。(Comparative Example 2) A case was conducted in which A1 was used as the fourth component. The film formation method and evaluation method are the same as in the examples.
第７．８図から明らかなように、ＡＩの添加では耐久性
に効果がない。As is clear from Figure 7.8, the addition of AI has no effect on durability.
以上の実施例からも明らかなように、本発明の４元系あ
るいは５元系合金の耐久効果を実用レベルまで向上させ
ることができる。As is clear from the above examples, the durability of the quaternary or quinary alloy of the present invention can be improved to a practical level.
本発明の記録材薄膜はそれだけで十分な耐久性を有する
が、これを保護膜と組合せることにより耐久性はさらに
向上する。この保護膜としては本出願人による特開昭６
０−１７７４４９号に記載の無アルカリガラスの保護膜
が特に好ましい。この保護膜の組成等については上記公
開公報を参照されたい。Although the recording material thin film of the present invention has sufficient durability by itself, the durability is further improved by combining it with a protective film. This protective film was developed by the present applicant in Japanese Unexamined Patent Publication No. 6
Particularly preferred is the alkali-free glass protective film described in No. 0-177449. For the composition of this protective film, etc., please refer to the above-mentioned publication.
本発明媒体は上記保護膜の他に公知のエンハンス膜等と
組合せることができるということは明らかである。It is clear that the medium of the present invention can be combined with known enhancement films and the like in addition to the above-mentioned protective films.
第１図は本発明によるＴｉ添加効果を示すための記録媒
体の６０°Ｃ９９０％ＲＨ下でのピンホール数変化率を
経過時間に対して描いた図。
第２図は同じ＜ ＢＥＲ（ビットエラー率）の変化率を
経過時間に対して描いたもの。
第３図および第４図は本発明によるＣｒ添加効果を示す
ための第１図と同様なピンホール変化率およびＢＥＲ変
化率を各々示す図。
第５〜８図は比較例を示す図で、第５図および第６図は
本発明を用いない場合のピンホール数変化（Ｎ ｂ）と
ＢＥＲ変化率を各々示し、第７図および第８図は本発明
でないＡＩの添加では効果がないということを示す、ピ
ンホール変化率とＢＥＲ変化率を各々示す図。
特許出願人 ダイセル化学工業株式会社代 理
人 弁理士 越 場 隆６０°Ｃ，
９０＄ＲＨ保持時間 Ｈｒ
６０°Ｃ８９０％ＲＨ保持時間 Ｈｒ
６０℃、９０％ＲＨ保持時間 Ｈｒ
ＬＪ ＩＬＪＬＪ 乙Ｕυ ｂＵ
Ｕ第５図
６０°Ｃ，９０％ＲＨ
保持時間 Ｈｒ
第６図
保持時間 （Ｈｒ）
第７図
６０°Ｇ、９０％ＲＨ
保持時間 （Ｈｒ）
第８図
保持時間 （Ｈｒ）FIG. 1 is a diagram depicting the rate of change in the number of pinholes of a recording medium at 60° C. and 990% RH versus elapsed time to show the effect of adding Ti according to the present invention. Figure 2 shows the rate of change in BER (bit error rate) versus elapsed time. FIGS. 3 and 4 are diagrams showing the pinhole change rate and BER change rate, respectively, similar to FIG. 1 to show the effect of adding Cr according to the present invention. 5 to 8 are diagrams showing comparative examples, and FIGS. 5 and 6 respectively show the change in the number of pinholes (Nb) and the BER change rate when the present invention is not used, and FIGS. The figure shows the pinhole change rate and BER change rate, respectively, showing that the addition of AI that is not of the present invention has no effect. Patent applicant Daicel Chemical Industries, Ltd. Representative
Patent attorney Takashi Koshiba 60°C,
90$RH holding time Hr 60°C890%RH holding time Hr 60°C, 90%RH holding time Hr LJ ILJLJ OtsuUυ bU
U Fig. 5 60°C, 90%RH Holding time Hr Fig. 6 Holding time (Hr) Fig. 7 60°G, 90%RH Holding time (Hr) Fig. 8 Holding time (Hr)
Claims (1)
よびコバルトより成る光磁気記録材の薄膜とを有する光
磁気記録媒体において、上記光磁気記録材がさらにチタ
ンおよびクロムより成る群より選択された少なくとも一
つの元素を２〜６原子％含むことを特徴とする光磁気記
録媒体。 ２）上記光磁気記録材薄膜の組成が下記の式で表わされ
ることを特徴とする特許請求の範囲第１項記載の光磁気
記録媒体： ［Ｔｂ＿ｙ（Ｆｅ＿１＿０＿０＿−＿ｚＣｏ＿ｚ）＿１
＿０＿０＿−＿ｙ］＿１＿０＿０＿−＿ｘＭ＿ｘここで
ＭはＴｉおよび／またはＣｒ ｘは２〜６ｚは５〜２０ ｙは２０〜３０ ３）上記基板と光磁気記録材薄膜との間および／または
光磁気記録材薄膜の外表面上に保護層および／またはエ
ンハンス層がさらに設けられていることを特徴とする特
許請求の範囲第１、２項いずれか一項に記載の光磁気記
録媒体。[Scope of Claims] 1) A magneto-optical recording medium having a substrate and a thin film of a magneto-optical recording material made of terbium, iron and cobalt formed on the substrate, wherein the magneto-optical recording material further contains titanium and chromium. 1. A magneto-optical recording medium comprising 2 to 6 atomic percent of at least one element selected from the group consisting of: 2) The magneto-optical recording medium according to claim 1, wherein the composition of the magneto-optical recording material thin film is expressed by the following formula: [Tb_y(Fe_1_0_0_-_zCo_z)_1
_0_0_-_y]_1_0_0_-_xM_x where M is Ti and/or Cr x is 2 to 6z is 5 to 20 y is 20 to 30 3) Between the substrate and the magneto-optical recording material thin film and/or the magneto-optical recording material 3. The magneto-optical recording medium according to claim 1, further comprising a protective layer and/or an enhancement layer on the outer surface of the thin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23290386A JPS6387633A (en) | 1986-09-30 | 1986-09-30 | Magneto-optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23290386A JPS6387633A (en) | 1986-09-30 | 1986-09-30 | Magneto-optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6387633A true JPS6387633A (en) | 1988-04-18 |
Family
ID=16946644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23290386A Pending JPS6387633A (en) | 1986-09-30 | 1986-09-30 | Magneto-optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6387633A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122851A (en) * | 1989-10-06 | 1991-05-24 | Nec Corp | Magneto-optical recording medium |
| JPH03122850A (en) * | 1989-10-06 | 1991-05-24 | Nec Corp | Magneto-optical recording medium |
| JPH03122849A (en) * | 1989-10-06 | 1991-05-24 | Nec Corp | Magneto-optical recording medium |
| JPH03122848A (en) * | 1989-10-06 | 1991-05-24 | Nec Corp | Magneto-optical recording medium |
| WO1996013034A1 (en) * | 1994-10-24 | 1996-05-02 | Keele University | Data storage device |
-
1986
- 1986-09-30 JP JP23290386A patent/JPS6387633A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122851A (en) * | 1989-10-06 | 1991-05-24 | Nec Corp | Magneto-optical recording medium |
| JPH03122850A (en) * | 1989-10-06 | 1991-05-24 | Nec Corp | Magneto-optical recording medium |
| JPH03122849A (en) * | 1989-10-06 | 1991-05-24 | Nec Corp | Magneto-optical recording medium |
| JPH03122848A (en) * | 1989-10-06 | 1991-05-24 | Nec Corp | Magneto-optical recording medium |
| WO1996013034A1 (en) * | 1994-10-24 | 1996-05-02 | Keele University | Data storage device |
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