JPS6021507A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6021507A JPS6021507A JP58128717A JP12871783A JPS6021507A JP S6021507 A JPS6021507 A JP S6021507A JP 58128717 A JP58128717 A JP 58128717A JP 12871783 A JP12871783 A JP 12871783A JP S6021507 A JPS6021507 A JP S6021507A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- thin film
- magnetic material
- material thin
- recording medium
- 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
- 239000010409 thin film Substances 0.000 claims abstract description 47
- 239000000696 magnetic material Substances 0.000 claims abstract description 35
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract description 9
- 239000010955 niobium Substances 0.000 claims description 14
- 239000010408 film Substances 0.000 claims description 6
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 230000004907 flux Effects 0.000 abstract description 6
- 230000035699 permeability Effects 0.000 abstract description 6
- 238000004544 sputter deposition Methods 0.000 abstract description 6
- 229910002620 Hf–Nb Inorganic materials 0.000 abstract description 3
- 239000010941 cobalt Substances 0.000 abstract description 3
- 229910017052 cobalt Inorganic materials 0.000 abstract description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004642 Polyimide Substances 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229920001721 polyimide Polymers 0.000 abstract description 2
- 229920003002 synthetic resin Polymers 0.000 abstract description 2
- 239000000057 synthetic resin Substances 0.000 abstract description 2
- 229920003055 poly(ester-imide) Polymers 0.000 abstract 1
- 230000001172 regenerating effect Effects 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910000889 permalloy Inorganic materials 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229910002056 binary alloy Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052735 hafnium Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- ZTXONRUJVYXVTJ-UHFFFAOYSA-N chromium copper Chemical compound [Cr][Cu][Cr] ZTXONRUJVYXVTJ-UHFFFAOYSA-N 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
- G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
- G11B5/672—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having different compositions in a plurality of magnetic layers, e.g. layer compositions having differing elemental components or differing proportions of elements
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は磁・邊（、記録媒体に係り、特に垂直磁気記録
ができるＭ Ｋ ｌ！Ｌ！ 峰、楳１トに関する十）の
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to magnetic recording media, and in particular to magnetic recording media capable of perpendicular magnetic recording.
近年、ｊｌｋｌ配気媒体の記録密度を高めるため、垂直
磁気記録１１式が倹ｉｔ・１されている。この記録方式
に用いられる磁気記録媒体は、基ｔ（と、その基材の表
面に形成さｈｌ−第１の磁性材薄膜と、ぞの第１１７１
磁性Ｈ’ＡＩ膜の表面に形成された第２の磁性材薄膜と
から構成されている。ｔしてこの第２の磁性材薄膜の膜
厚方向、すなわち垂直方向に磁化されることにより、所
望のデータが記録されるようになっている。In recent years, in order to increase the recording density of JLKL air distribution media, 11 types of perpendicular magnetic recording have been reduced. The magnetic recording medium used in this recording method consists of a substrate t (a first thin film of magnetic material formed on the surface of the substrate t), and a first thin film of magnetic material formed on the surface of the substrate.
and a second magnetic material thin film formed on the surface of the magnetic H'AI film. t, the second magnetic material thin film is magnetized in the film thickness direction, that is, in the perpendicular direction, thereby recording desired data.
前記第１の磁性材薄膜は第２の磁性材薄膜を磁化するど
きに磁路の一部を形成する役割を有しており、保磁力が
低く、しかも透磁率ならびしコ飽和磁束密度がどもに高
いことが要求される。一方、第２の磁性ｆ１薄膜どして
は、特に垂直方向に異方性を有することが要求され、こ
の要求に応えるものとして、コバルト−り［１ムの２成
分系合金あるいけこれに「■ジウムなどの第３合属を添
加した３−２・
成づ）系合金などのコバルト−クロム系合金薄膜がある
。The first magnetic material thin film has a role of forming a part of the magnetic path when magnetizing the second magnetic material thin film, and has a low coercive force and a low magnetic permeability and saturation magnetic flux density. is required to be high. On the other hand, the second magnetic f1 thin film is required to have anisotropy, especially in the perpendicular direction. ■There are thin films of cobalt-chromium alloys such as 3-2.
従来のこの種の磁気記録媒体では第１の磁性材薄１僕と
して、鉄−ニッケル合金からなるパーマロイか用いられ
ている。ところがこのものは透磁率ならびに飽和磁束密
度が十分に高くなく、しかも前記コバルト−クロム系合
金からなる第２の磁性上４薄膜との磁気特性」二の所謂
相性が良くない。すなわら、結晶構造が面心立方晶系の
パーマロイからろ゛る第１の磁性材薄膜の上に、コバル
ト−クロム系合金の第２の磁性材薄膜を形成した場合、
それの丁層にあたるパーマロイ薄膜の影響を受けて（特
に第２の磁性材薄膜が薄いことも関係して）、その＝】
パル１−一クロム系合金薄膜の結晶構造が正規の六方晶
系になり輩い。そのためクロム−コバ用１〜系合金の特
長である優れた垂直異方性が十分に発■ＩＶされない。In conventional magnetic recording media of this type, permalloy made of an iron-nickel alloy is used as the first magnetic material thin layer. However, this material does not have sufficiently high magnetic permeability and saturation magnetic flux density, and is not compatible with the second magnetic thin film made of the cobalt-chromium alloy in terms of magnetic properties. In other words, when a second magnetic material thin film of a cobalt-chromium alloy is formed on a first magnetic material thin film whose crystal structure is face-centered cubic permalloy,
Due to the influence of the permalloy thin film that is the first layer of it (particularly due to the thinness of the second magnetic material thin film), the =]
The crystal structure of PAL 1-monochromium alloy thin film becomes a regular hexagonal system. Therefore, the excellent perpendicular anisotropy, which is a feature of the chromium-copper alloys 1 to 1, is not sufficiently developed.
このようにパーマロイはコバ用１−−クロム系合金との
磁気特性上の相性が良くないことと、前述のように透磁
率ならびに飽和磁束密度が十分に高くないことが原因で
、折角、磁気特性の優、ＩｌｌたＩバルト−り［１ム系
６合がＩＥ昌・る第２ （７） ［（’ｌ・材ａＩｌｉ
５ ｅ＝用イ゛ｃ ＋ｉ、ソノ特１’ｌ カー１分１：
’Ｑ揮で古ｌｊ・い欠点／バあ−）だ。In this way, permalloy is not compatible with the magnetic properties of the chromium-based alloy used for the edge, and as mentioned above, the magnetic permeability and saturation magnetic flux density are not high enough. No Yu, Ill ta I Baltic [1 mu system 6 go is IE Chang ru 2nd (7) [('l・material aIli
5 e= used ic +i, sono special 1'l car 1 minute 1:
'Q's old lj, bad flaws/baa-).
本発明σ月１的（４２，こ（ｆｌ Ｊ、うな従来技術の
欠点７ｉＭ／１ｆｆ１７． （Ｊｊ Ｓ＜、特１’ｌ
ｒｌＩ ｆ、ｌｌれ／ｈ ｉ：ｌＡ磁気記録媒体Ｉｌ＾
（ＩＬ するにあう。The present invention σ month 1 (42, ko (fl J, una disadvantages of the prior art 7iM/1ff17. (Jj S<, special 1'l
rlI f, llre/h i:lA magnetic recording medium Il^
(IL)
本発明跨ら（Ｊ、スパッタリン）ｆなどによ〜）で得ら
れろアモルノ）′ス合ｆＬ薄＋１’Ｊに−）い−ｒｆｆ
ｆｌ々研究しノ：結東、：」バルト（（、”、 ｏ ）
を１ミ成分どし、少■のハ７二１°ツム白１［）とニー
４ブ（Ｎｂ）＆添加したＣ ｏ−１１ｆ−Ｎ ｌ百ノ）
′（成≦）系“ｙモルファス合余が、この種の１ｉｌｌ
鼠記録４１１体の第１の磁性材薄膜どして優れた特性
を有１． ｒいろ４ことをり１出（，７た、１」大板に
結晶１１；ガラスも用い、コバルトデーｒス）Ｊ（的、
１″￥１０１．６１１１１１１１１’ｆさ５ｍ＋ｎ）、
１−にハフニウムのべＬ／ツ）・と−オブのべ１ツバノ
ド
ｌ ｒｌ ＋ｎｍ 、横１０ｍｍ−厚さＩ＋，１ｔｎ）
を中心Ｊ：り放射状に交１ｆに配置？？＋，９−ゲット
にのべ１４ノソ１への数を調整する二どにｋ ＩＪ斤６
７〃旧Ｉ＼ｔが変えられるにうにする。ｔしでう′ルゴ
ンによ装置１ｍ前の真空度がＪ＝３−
Ｘｌ１１−’Ｔｏｒｒ以下の高真空にし、アルゴンの雰
囲気中で、高周波電力２Ｗ／ｃｍ２でスパッタリングを
行ない、基板−ににコバルトを主成分とするＧｏ ）Ｉ
ｆ Ｎｂの３成分系アモルファス合金薄膜を作成する。According to the present invention, it can be obtained by (J, sputtering, etc.).
I researched many things: Yuto, :” Barto ((,”, o)
1 component, a small amount of Ha721° Tsum White 1[) and Knee 4B (Nb) & added Co-11f-Nl100)
′(formation≦) system “ymorphous conjunction is 1ill of this kind
The first magnetic material thin film of Mouse Recording 411 has excellent properties.1. r Iro 4 Kotoori 1 out (, 7, 1" 11 crystals on a large plate; glass is also used, cobalt base) J (target,
1″￥101.611111111’f5m+n),
1-Hafnium base L/T) and -Obe 1 base l rl +nm, width 10mm-thickness I+, 1tn)
Center J: radially intersecting 1f? ? +, 9- to get a total of 14 noso 1 to adjust the number to the second k IJ catty 6
7. Make the old I\t changeable. The degree of vacuum 1 m in front of the apparatus was set to a high vacuum of less than J = 3 - Go whose main component is )I
f A three-component amorphous alloy thin film of Nb is created.
このようにして作成された各種組成の合金試料が後述の
各特性試験に使用される。Alloy samples of various compositions prepared in this way are used for each characteristic test described below.
第１図は、後記の合金組成表において合金中のＮｂ含有
率Ｙが常に６．７原子％になるようにして、Ｉ（ ｆ含
有率Ｘを種々変えた場合の磁気特性図Ｃある。FIG. 1 is a magnetic characteristic diagram C when the Nb content Y in the alloy is always 6.7 atomic % in the alloy composition table described later, and the I(f content X is variously changed.
合金組成表
なお図中において曲線Ｂｓは飽和磁束密度，曲線μｅは
周波数５１１０ＫＨｚにおける困難軸方向の透磁率，曲
線ｆ−Ｔ ｃは困難軸方向の保磁力である。In the alloy composition table, the curve Bs is the saturation magnetic flux density, the curve μe is the magnetic permeability in the hard axis direction at a frequency of 5110 KHz, and the curve f-Tc is the coercive force in the hard axis direction.
この図から明らかなように、Ｉ−１ ｆ含有率が０原子
％のＣＯＮ＋）２成分系合金は、Ｂｓは高いが、・Ｉ
Ｈ ｃ／Ｊ’高過ぎ、μｅが低い。これにＩゴｆをり量
添加するとＨｃが極端に下がり、μｅは連に高くなる。As is clear from this figure, the CON+) binary alloy with an I-1 f content of 0 atomic % has high Bs, but .I H c/J' is too high and μe is low. When a certain amount of Igof is added to this, Hc decreases extremely and μe becomes extremely high.
なお、■（Ｆの含有率がある程度以上になると。Note that ■(When the F content exceeds a certain level.
Ｈａは高くな；）、μθは低くなる。一方、Ｂ９は極端
ではないがｉ（ ｆの含有率の増大とともに低下する傾
向にある。Ha is high ;), μθ is low. On the other hand, B9 tends to decrease as the content of i(f increases, although it is not extreme.
このような特性傾向のなかで、Ｂｓを高・（保ら、Ｈｅ
を下げ、扁μｅ＆こするためには、Ｈｆの含有率Ｘを１
原子％以上でかつ５原子％未満の範囲、好ましくは１．
５・〜，３Ｍ子％の範回に規制する必要がある。このこ
とはＮｂ含有率Ｙを若干変ｆヒさせても同様ｅある。In this characteristic trend, Bs is kept high (and He
In order to lower the
% or more and less than 5 atomic %, preferably 1.
It is necessary to limit the number of children to 5% to 3M%. This holds true even if the Nb content Y is slightly changed.
第２図は、前記合金組成表において合金中のＨｆ含有率
Ｘが常に２．２原子％になるようにして．Ｎｂ含有率Ｙ
を種々変えた場合の磁気特性図である。Figure 2 shows the alloy composition table in which the Hf content X in the alloy is always 2.2 at%. Nb content Y
It is a magnetic characteristic diagram when changing variously.
この図から明らかなように、）Ｊｂ含有率が０原子・糸
のＧ ｏ − Ｈ ｆ ２成分系合金も前述と同様に。As is clear from this figure, the G o - H f binary alloy with a Jb content of 0 atoms/thread is the same as described above.
Ｂｓは高いが、Ｈｅが高過ぎ，μｅが低い。これにＮｂ
を少量添加することによりＨｅが極端に下がり、μ０が
逆に高くなる。なお、Ｎｂの含有率がある程度以上にな
ると、Ｈｅは高くなり、Ｈｅは低くなる。一方、Ｂｓは
極端ではないがＮｂの含有率の増大とともに低下する傾
向がある。Although Bs is high, He is too high and μe is low. To this, Nb
By adding a small amount of , He becomes extremely low and μ0 becomes high. Note that when the Nb content exceeds a certain level, He becomes high and He becomes low. On the other hand, Bs tends to decrease as the Nb content increases, although this is not extreme.
このような特性傾向のなかで、Ｂｓを高く保ち、）−１
ｃ：を下げ、高μ０にするためには、Ｎｂの含有率Ｙを
４〜８原子％、好ましくは４〜６原子％の範囲に規制す
る必要がある。このことはＨｆ含有率Ｘを若干変化させ
ても同様である。Amidst these characteristic trends, keeping Bs high and )-1
In order to lower c: and obtain a high μ0, it is necessary to control the Nb content Y to a range of 4 to 8 atomic %, preferably 4 to 6 atomic %. This holds true even if the Hf content X is slightly changed.
第３図は１本発明の実施例に係る磁気記録媒体を説明す
るための図である。ポリエステル、ポリイミドヒＪ〕ど
の合成樹脂あるいは陽極酸化したアルミニウム板などか
らなる基材１の表面に、Ｃｏ含有率が９１．１原子％、
１１ ｆ含有率が２．２原子％、Ｎｂ＃有率が６．７Ｊ
Ｊｉｌ子％であるＣｏ−ＨｆＮ ｌ＋の３成分系アモル
ファス合金薄膜をスパッタリングによって形成して、第
１の磁性材薄膜２とする。次にこの第１の磁性材薄膜２
の表面に、コバル１−を主成分とし、これに少量のクロ
ムを添加したに ＯＣｒの２成分系合金薄膜をスパッタ
リングによっ゛Ｃ形成して、第２の磁性材薄［３どする
。この磁性材薄膜２，３の膜厚は、両者とも約０．３１
口ηｃＪうる。これら基材１と第１の磁性材ａ１１１２
ど第２の磁性１４＃膜３とがらテープ状あるいはデ、イ
ス！）状の磁気記録媒体が構成される。FIG. 3 is a diagram for explaining a magnetic recording medium according to an embodiment of the present invention. [Polyester, polyimide J] The surface of the base material 1 made of any synthetic resin or anodized aluminum plate has a Co content of 91.1 at%,
11 f content is 2.2 at%, Nb# content is 6.7J
A ternary amorphous alloy thin film of Co--HfN l+ having a concentration of JIl+ is formed by sputtering to form the first magnetic material thin film 2. Next, this first magnetic material thin film 2
A thin film of a two-component alloy of OCr containing Cobal 1 as the main component and a small amount of chromium added thereto is formed by sputtering on the surface of the second magnetic material thin film [3]. The film thickness of the magnetic material thin films 2 and 3 is approximately 0.31
Mouth ηcJ. These base materials 1 and the first magnetic material a1112
The second magnetic 14# film 3 is shaped like a tape or a chair! )-shaped magnetic recording medium is constructed.
］）ム記磁姓（（薄膜２．３は基材１の両面に設ける町
今もある。]) Muji porcelain name ((The thin film 2.3 is now provided on both sides of the base material 1.
この磁気記録媒体を間に挟むようにして、主磁極５と補
助磁極〔；どが配置されている。主磁極５は厚さが約１
７ｚ程度の）−のｅ、ガラスやポリーｒミドＭｔ４ Ｉ
］１ｊなどからなる非磁性材の基板ノ】」二にスパッタ
リングによで）（Ｊｌ？成される。補助磁極６には、コ
イル７が所定ターン数だけａ′ＪＡされている。このコ
イル７に記録されるべき信号電流を流し゛Ｃ主磁極５を
補助磁（、輯（ｊ側がら励磁すると、主磁極５の先端付
近に強い曲直磁界が発生釘る。これによって主磁極！３
の先端近傍にある磁性材薄膜２，３が厚さｉｊ向に磁化
され、第２の磁性材薄膜３にデータが記録さ、＃【、る
。第１の磁性材薄ＩＩＩ ２は第２磁性材薄膜３にデー
、ぐＩ！Ｌ：ｌｉ１気記録する際、磁路の一７一
部を構成するのに役立つ。A main magnetic pole 5 and an auxiliary magnetic pole are arranged with this magnetic recording medium sandwiched therebetween. The thickness of the main magnetic pole 5 is approximately 1
7z)-e, glass or polyamide Mt4 I
A substrate made of a non-magnetic material such as ]1j is formed by sputtering.A coil 7 is connected to the auxiliary magnetic pole 6 by a predetermined number of turns.This coil 7 When a signal current to be recorded is passed through the main magnetic pole 5 and the main magnetic pole 5 is energized from the auxiliary magnetic side (J side), a strong curved magnetic field is generated near the tip of the main magnetic pole 5. This causes the main magnetic pole 5
The magnetic thin films 2 and 3 near the tips of the magnetic thin films 2 and 3 are magnetized in the direction of thickness ij, and data is recorded in the second magnetic thin film 3. The first magnetic material thin film III 2 is applied to the second magnetic material thin film 3! L: Uses to form part of the magnetic path when recording.
本発明は前述のように、基材と、その基材の表面に形成
された第１の磁性材薄膜と、その第１の磁性材薄膜の表
面に形成されて垂直異方性を有する第２の磁性材薄膜と
を備え、前記第２の磁性材薄膜が膜厚方向に磁化される
磁気記録媒体において、前記第１の磁性材薄膜が、コバ
ルトを主成分とし、それに少量のジルコニウムとニオブ
を添加した３成分系のアモルファス合金から構成され、
その合金中におけるハフニウムの含有率をＩＭ子％以上
でかつ５原子％未満、ニオブの含有率を４原子％以上で
かつ８原子％以下の範囲に規制したことを特徴とするも
のである。As described above, the present invention includes a base material, a first magnetic thin film formed on the surface of the base material, and a second magnetic material thin film formed on the surface of the first magnetic material thin film and having perpendicular anisotropy. a magnetic recording medium in which the second magnetic material thin film is magnetized in the film thickness direction, wherein the first magnetic material thin film contains cobalt as a main component and small amounts of zirconium and niobium. Consists of a three-component amorphous alloy with added
The alloy is characterized in that the content of hafnium in the alloy is restricted to IM% or more and less than 5 at%, and the content of niobium is restricted to 4 at% or more and 8 at% or less.
前述のアモルファス合金は、保磁力が低く、透磁率なら
びに飽和磁束密度が高く、しかもコバルト−クロム系合
金との磁気特性がよく似通っており、コバルト−クロム
系合金の優れた磁気異方性がそのまま発揮できる。その
ため優れた記録、再生特性を有し、また第２の磁性材薄
膜を可及的に薄くすることができる。The amorphous alloy mentioned above has a low coercive force, high magnetic permeability, and high saturation magnetic flux density, and its magnetic properties are very similar to those of the cobalt-chromium alloy, and it retains the excellent magnetic anisotropy of the cobalt-chromium alloy. I can demonstrate it. Therefore, it has excellent recording and reproducing characteristics, and the second magnetic material thin film can be made as thin as possible.
９− ８−9- 8-
第１図は本発明に係るＣ ｏ −Ｈｆ −Ｎ ｂ系アモ
ルファス合金中の）Ｉ ｆ含有率と各種磁気特性との関
係を示す特性図、第２図は前記合金中のＮｂ含有率と各
種磁気特性との関係を示す特性図、第３図は本発明の実
施例に係る磁気記録媒体を説明するための説明図である
。
し・・基材、２・・・第１の磁性材薄膜、３・・・第２
の磁性材薄膜。
第１図
第２図
Ｈｆ含を率（ａｔ％）
Ｎｌ） ｇｑ千１０１−１０ＪFig. 1 is a characteristic diagram showing the relationship between the If content in the Co-Hf-Nb amorphous alloy according to the present invention and various magnetic properties, and Fig. 2 shows the relationship between the Nb content in the alloy and various magnetic properties. A characteristic diagram showing the relationship with magnetic properties, FIG. 3 is an explanatory diagram for explaining a magnetic recording medium according to an embodiment of the present invention. B...Base material, 2...First magnetic material thin film, 3...Second
thin film of magnetic material. Figure 1 Figure 2 Hf content ratio (at%) Nl) gq 101-10J
Claims (1)
第１の磁性＋Ａ薄腸と、その第１の磁性材薄膜の表面に
形成されて垂直異方１’ｌを有する第２の磁性材薄膜と
を備え、前記第２の磁性材薄膜が膜厚方向に磁化される
硯気配録媒１ト「おいて、前記第１の磁性材簿膜が、コ
バ月何−を１成分とし、それに小社のハフニラ１５とニ
オブも添２＋１１１．た３成分系のアモルファス合金か
ら構成さＪ（、その合金中におけるハフニラ１１の含有
率をＩ Ｊｌｉ（ｒγ、以１、でかつ５Ｊボ子％未満、
二Ａブの含イ１申佇４１７に子“に以」−でかつ８〃バ
子％以１：の範囲に規制さ４ビエニいることを特徴とす
る磁気記録媒体。 （２、特許請求の範囲第（１）項ｉ！＋３戟において、
前記第２の磁性＋４薄膜が」パルＩ・およびクロムを含
むコバル１−−り「１１３系今金薄膜から構成されてい
ることを特徴とする磁気記録媒体。 −１−へ−(1) Group +A, first magnetic +A thin film formed on the surface of its ll1f++, and second magnetic material formed on the surface of the first magnetic material thin film and having perpendicular anisotropy 1'l a magnetic recording medium in which the second magnetic material thin film is magnetized in the film thickness direction; It is composed of a three-component amorphous alloy in which Hafnira 15 and niobium of Shosha are added 2 + 111. The content of Hafnira 11 in the alloy is
1. A magnetic recording medium characterized in that the content of 2A is 417% and 417% is regulated to be within the range of 8% or more. (2. In claim (1), i!+3,
A magnetic recording medium characterized in that the second magnetic +4 thin film is composed of a Kobal 1- or 113-based Gold thin film containing Pal I and chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58128717A JPS6021507A (en) | 1983-07-16 | 1983-07-16 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58128717A JPS6021507A (en) | 1983-07-16 | 1983-07-16 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6021507A true JPS6021507A (en) | 1985-02-02 |
Family
ID=14991682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58128717A Pending JPS6021507A (en) | 1983-07-16 | 1983-07-16 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6021507A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5473506A (en) * | 1977-11-25 | 1979-06-12 | Fumiaki Nukada | Telephone transfer unit |
| US4622273A (en) * | 1983-11-05 | 1986-11-11 | Alps Electric Co., Ltd. | Recording medium for perpendicular magnetization |
| US4686151A (en) * | 1985-04-09 | 1987-08-11 | Dynamic Disk | Substrate material for magnetic recording media |
-
1983
- 1983-07-16 JP JP58128717A patent/JPS6021507A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5473506A (en) * | 1977-11-25 | 1979-06-12 | Fumiaki Nukada | Telephone transfer unit |
| JPS6119146B2 (en) * | 1977-11-25 | 1986-05-15 | Komunikusu Kk | |
| US4622273A (en) * | 1983-11-05 | 1986-11-11 | Alps Electric Co., Ltd. | Recording medium for perpendicular magnetization |
| US4686151A (en) * | 1985-04-09 | 1987-08-11 | Dynamic Disk | Substrate material for magnetic recording media |
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