JPH01232517A - Thin metallic film type magnetic recording medium - Google Patents
Thin metallic film type magnetic recording mediumInfo
- Publication number
- JPH01232517A JPH01232517A JP5704388A JP5704388A JPH01232517A JP H01232517 A JPH01232517 A JP H01232517A JP 5704388 A JP5704388 A JP 5704388A JP 5704388 A JP5704388 A JP 5704388A JP H01232517 A JPH01232517 A JP H01232517A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- film
- alloy
- conicr
- recording
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 100
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 31
- 239000000956 alloy Substances 0.000 claims abstract description 31
- 239000010408 film Substances 0.000 claims description 50
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000010409 thin film Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 229910002058 ternary alloy Inorganic materials 0.000 abstract description 7
- 229910052797 bismuth Inorganic materials 0.000 abstract description 5
- 230000004907 flux Effects 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 229910002441 CoNi Inorganic materials 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は金属薄膜型磁気記録媒体に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a metal thin film magnetic recording medium.
磁気記録装置における記録媒体として、従来より、非磁
性基体の表面に、酸化鉄粉末と有機バインダとからなる
磁性膜を形成した所謂塗布型磁気記録媒体が使用されて
きたが、近時は６ｎ気記録の高密度化の要請から強磁性
金属薄膜を磁性膜とする金属薄膜型磁気記録媒体へと変
わりつつある。So-called coated magnetic recording media, in which a magnetic film made of iron oxide powder and an organic binder is formed on the surface of a non-magnetic substrate, have traditionally been used as recording media in magnetic recording devices. Due to the demand for higher recording density, a shift is being made to metal thin film type magnetic recording media in which a ferromagnetic metal thin film is used as the magnetic film.
その非磁性基体に形成される磁性膜の成分組成は、磁気
的性質、記録再生特性、耐候性等を総合的に評価して決
定されるが、−ａ的にＣｏ、ＣｏＮｉ系、ＣｏＣｒ系、
またはＣｏＮｉＣｒ系合金が使用されている。The component composition of the magnetic film formed on the non-magnetic substrate is determined by comprehensively evaluating magnetic properties, recording/reproducing characteristics, weather resistance, etc.;
Alternatively, a CoNiCr alloy is used.
上記金属薄膜型磁気記録媒体は、これまでの塗布型磁気
記録媒体にまさる高密度の記録が可能であるが、その記
録再生ノイズが大きいため、これ以上の高密度化は期待
し難い。その記録密度の向上を実現するためには、再生
ノイズを低減し、ノイズによる再生波形のピークシフト
を少なくすることが必要である。The metal thin film type magnetic recording medium allows higher density recording than conventional coating type magnetic recording media, but it is difficult to expect higher densities due to the large recording and reproduction noise. In order to improve the recording density, it is necessary to reduce reproduction noise and reduce the peak shift of the reproduced waveform due to noise.
本発明は上記に迄み、記録再生ノイズを低減し、再生波
形ピークシフトが改善された高密度記録用金属薄膜型磁
気記録媒体を提供することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a metal thin film magnetic recording medium for high-density recording, which reduces recording and reproduction noise and improves reproduction waveform peak shift.
〔問題点を解決するための手段および作用〕本発明の金
属薄膜型磁気記録媒体は、その金属系磁性膜が、非固溶
性ないしは低固溶性の非磁性元素が添加されたＣｏＮｉ
Ｃｒ系合金からなることを特徴としている。[Means and effects for solving the problems] The metal thin film magnetic recording medium of the present invention has a metal magnetic film made of CoNi to which a non-solid soluble or low solid soluble non-magnetic element is added.
It is characterized by being made of a Cr-based alloy.
本発明の磁気記録媒体の金属系磁性膜は、上記のように
、ＣｏＮｉＣｒ系合金に、第４元素として、非固溶性ま
たは低固溶性の非磁性元素が添加された組成を有する合
金である。この第４元素の例として、Ｐ、Ｂｉ等が挙げ
られる。ＣｏＮｉＣｒ系３元合金は、磁性膜として望ま
れる高保磁力（Ｈｃ）および高残留磁束密度（Ｂｒ）を
有する合金であり、本発明に従ってこれに第４元素とし
て、Ｐ、Ｂｉ等を適量添加することにより、ＣｏＮｉＣ
ｒ系３元合金磁性膜の有する磁気特性・電気特性を損な
うことなく、記録再生ノイズ特性の顕著な改善効果が得
られる。これは上記第４元素の単体または化合物が、Ｃ
ｏＮｉＣｒ合金磁性膜の結晶粒のまわりに晶出・析出す
ることにより結晶粒同士が分離・孤立化し、その結果と
して磁区の微細化が生じてノイズの主因である磁化遷移
幅が減少するものと考えられる。第４元素の添加は１種
の元素に限られず、複合添加の場合もある。As described above, the metal-based magnetic film of the magnetic recording medium of the present invention is an alloy having a composition in which a non-solid-soluble or low-solid-soluble non-magnetic element is added as a fourth element to a CoNiCr-based alloy. Examples of this fourth element include P, Bi, and the like. The CoNiCr-based ternary alloy is an alloy that has a high coercive force (Hc) and a high residual magnetic flux density (Br) that are desired as a magnetic film, and according to the present invention, an appropriate amount of P, Bi, etc. can be added as a fourth element to this alloy. According to CoNiC
A remarkable improvement effect on recording/reproduction noise characteristics can be obtained without impairing the magnetic properties and electrical properties of the r-based ternary alloy magnetic film. This means that the simple substance or compound of the fourth element is C
It is thought that crystallization and precipitation around the crystal grains of the oNiCr alloy magnetic film causes the crystal grains to separate and become isolated, resulting in refinement of the magnetic domain and a decrease in the magnetization transition width, which is the main cause of noise. It will be done. The addition of the fourth element is not limited to one kind of element, but may be a combination of additions.
本発明の磁気記録媒体の磁性膜の合金組成は、下記の一
般式
％式％
〔但し、ＭはＰ、Ｂｉ等の第４元素であり、Ｘ。The alloy composition of the magnetic film of the magnetic recording medium of the present invention is expressed by the following general formula % [where M is a fourth element such as P or Bi, and X.
ｙ、ｚは原子比を表している〕
で示される。上記一般式で示される合金磁性膜は、好ま
しくはＮ ｉ 量１０〜３５ａｔ％（ｘ ＝０．ｌＯ〜
０．３５）、Ｃｒ量５〜１５ａｔ％（ｙ ＝０．０５〜
０．１５）であり、また第４元素（Ｍ）は、その元素の
種類により異なるが、Ｐの場合は２〜？ａｔ％（ｚ ＝
０．０２〜０．０７）、Ｂｉの場合は２〜１Ｏａｔ％（
ｚ ＝０．０２〜０．１０）が適当である。y and z represent the atomic ratio]. The alloy magnetic film represented by the above general formula preferably has a Ni content of 10 to 35 at% (x = 0.1O to
0.35), Cr amount 5 to 15 at% (y = 0.05 to
0.15), and the fourth element (M) varies depending on the type of element, but in the case of P, it is 2~? at% (z =
0.02 to 0.07), 2 to 1 Oat% for Bi (
z = 0.02 to 0.10) is suitable.
これらの理由について述べると、まずＮ１ｆｉ（１０〜
３５ａ ｔ％）については、１０ａｔ％に満だないと、
磁性膜の耐候性が不足し、他方３５ａ ｔ％をこえると
、飽和磁束密度（Ｂｓ）が減少し、良好な磁気特性・電
気特性の確保が困難となるからであり、またＣｒ量（５
〜１５ａｔ％）についても前記Ｎｉの場合と同じように
、５ａｔ％未満では耐候性が不足し、１５ａｔ％をこえ
ると良好な磁気特性・電気特性の確保が困難となるから
である。第４元素（Ｍ）については、該元素がＰである
場合、０．２ａｔ％以上の添加により、磁化遷移幅の減
少によるノイズ低減効果があられれ、添加量の増加とと
もにその効果は増すが、？ａｔ％をこえて多量に添加す
ると、ＣｏＮｉＣｒ系３元合金の有する磁気特性・電気
特性の低下を招くので、０．２〜７ａｔ％の範囲が適当
であり、またＢｉの場合についても、２〜１０ａｔ％の
範囲において、ＣｏＮｌＣｒａ元合金の磁気特性・電気
特性を損なわずに、磁化遷移幅の減少によるノイズ低減
効果を十分ならしめることができる。To explain these reasons, first of all, N1fi (10~
35at%), if it is less than 10at%,
This is because the weather resistance of the magnetic film is insufficient, and if it exceeds 35 at%, the saturation magnetic flux density (Bs) decreases, making it difficult to ensure good magnetic and electrical properties.
15 at%), as in the case of Ni, if it is less than 5 at%, weather resistance is insufficient, and if it exceeds 15 at%, it becomes difficult to ensure good magnetic and electrical properties. Regarding the fourth element (M), when the element is P, addition of 0.2 at% or more produces a noise reduction effect by reducing the magnetization transition width, and the effect increases as the amount added increases. ? If added in a large amount exceeding at%, the magnetic and electrical properties of the CoNiCr-based ternary alloy will deteriorate, so a range of 0.2 to 7 at% is appropriate. In the range of 10 at %, it is possible to achieve a sufficient noise reduction effect by reducing the magnetization transition width without impairing the magnetic properties and electrical properties of the CoNlCra base alloy.
本発明の金属薄膜型磁気記録媒体は、磁気ディスクをは
じめ、各種磁気ドラム、磁気テープ、磁気シート等を包
含する。これらは、いずれもその磁性膜が前記組成を有
するＣｏＮｉＣｒＭ系合金からなる点を除いて、公知の
一般的な工程および条件に従って製作することができる
。例えば、面内記録用磁気ディスクについて述べれば、
アルミニウム合金板等を基体とし、その表面に無電解め
っきにより硬質のＮ１−Ｐめっき膜（膜厚：例えば１５
〜２５μｍ）を設け、めっき膜面にテキスチャ処理を施
したのち、磁性膜に面内異方性を与えるための下地層と
して適宜の膜厚のＣｒ膜（例えば、１３００〜５０００
人）を形成する。そのＣｒ膜面上に、前記組成をもつＣ
ｏＮｉＣｒＭ合金磁性膜を成膜する。その膜厚は、例え
ば５００〜２０００人であってよい。ついで磁性膜の摩
耗・損傷を防止するための保護膜として、潤滑性と耐摩
耗性を備えた被膜、例えば炭素質膜（膜厚：例えば１５
０〜６００人）を形成することにより、多層積層構造を
有する面内記録用磁気ディスクを得る。The metal thin film magnetic recording medium of the present invention includes magnetic disks, various magnetic drums, magnetic tapes, magnetic sheets, and the like. These can be manufactured according to known general processes and conditions, except that the magnetic films are made of a CoNiCrM alloy having the above composition. For example, if we talk about a magnetic disk for longitudinal recording,
An aluminum alloy plate or the like is used as a base, and a hard N1-P plating film (thickness: e.g. 15
After applying a texture treatment to the plated film surface, a Cr film of an appropriate thickness (for example, 1300 to 5000
form people). On the Cr film surface, C having the above composition is
oNiCrM alloy magnetic film is formed. The film thickness may be, for example, 500 to 2000 people. Next, as a protective film to prevent wear and damage of the magnetic film, a film having lubricity and wear resistance, such as a carbonaceous film (thickness: e.g. 15
0 to 600 persons), a magnetic disk for longitudinal recording having a multilayer laminated structure is obtained.
なお、その積層構造は上記の例に限定されず、例えば、
磁性膜の上に、炭素質膜を成膜するに先立って、約１０
０〜５００人の膜厚のＣｒ膜を形成することにより、磁
気ディスクの耐候性を更に高めることもできる。また、
各層の成膜は、スパッタリング法、イオンブレーティン
グ法、真空蒸着法などにより行うことができる。Note that the laminated structure is not limited to the above example; for example,
Prior to forming the carbonaceous film on the magnetic film, about 10
By forming a Cr film with a thickness of 0 to 500 nm, the weather resistance of the magnetic disk can be further improved. Also,
Film formation of each layer can be performed by a sputtering method, an ion blating method, a vacuum evaporation method, or the like.
１隻炎上
（１）供試磁気ディスクの製作
アルミニウム合金基板（外径１３０［＋［１、内径４０
間、厚さ１．９＋＋ｕｎ）の表面に、Ｎ１−Ｐ無電解め
っき膜（膜厚２０μｍ）を形成し、表面をテキスチャ処
理したのち、マグネトロンスパッタリング法（但し、ア
ルゴン雰囲気圧：２． ＯＸ １Ｏ−２ｔｏｒｒ）によ
り、まずＣｒ膜（膜厚： １５００人）を形成し、つい
でＣｏ Ｎ ｔＣｒＰｄ元合金をターゲットとして磁性
膜を形成した。磁性膜の組成はＣｏｏ、ｔＮ ｉｏ、ｚ
ｃ ｒ ｏ、ｏｓＰｏ、。、であり、膜厚は８００人で
ある。更に、その磁性膜面上に保護膜として膜厚４００
人の炭素質膜を形成して供試磁気ディスク１を得た。そ
の保磁力（Ｈｃ）は９５００ ｅ 、 ６１１束密度（
Ｂｒ）と膜厚（δ）の積（Ｂｒ・δ）は５５０ Ｇ・μ
である。One ship went up in flames (1) Production of test magnetic disk Aluminum alloy substrate (outer diameter 130[+[1, inner diameter 40
After forming an N1-P electroless plating film (film thickness 20 μm) on the surface of the 1.9++ un) and texturing the surface, the magnetron sputtering method (argon atmosphere pressure: 2. OX 1O- First, a Cr film (thickness: 1,500 mm) was formed at a temperature of 2 torr), and then a magnetic film was formed using a CoN tCrPd base alloy as a target. The composition of the magnetic film is Coo, tN io,z
cr o, osPo,. , and the film thickness is 800 people. Furthermore, a protective film with a thickness of 400 mm is applied on the magnetic film surface.
A test magnetic disk 1 was obtained by forming a carbonaceous film. Its coercive force (Hc) is 9500 e, 611 flux density (
The product (Br・δ) of Br) and film thickness (δ) is 550 G・μ
It is.
また、磁性膜形成用ターゲットとして、Ｃ０Ｎｉ合金、
ＣｏＮｉＣｒ合金、またはＣｏＮｌＰ合金を使用した点
を除いて上記と同じ条件により、ＣＯｏ、ｓＮ ｉ Ｏ
，２合金磁性膜を有する供試磁気ディスク１１、ＣＯｏ
、ｔＮｉｏ、ｔＣｒｏ、＋合金磁性膜を有する供試磁気
ディスク１２、およびＣｏ ６．ｔＮ ｉ ＋１． ｔ
ＰＯ，１合金磁性膜を有する供試磁気ディスク１３を得
た。In addition, C0Ni alloy,
Under the same conditions as above except that CoNiCr alloy or CoNlP alloy was used, COo, sN i O
, 2 alloy magnetic film test magnetic disk 11, COo
, tNio, tCro, + test magnetic disk 12 having alloy magnetic films, and Co 6. tN i +1. t
A test magnetic disk 13 having a PO,1 alloy magnetic film was obtained.
なお、各供試磁気ディスクのノイズ特性の正当な比較の
ためには、互いの磁束密度と膜厚の積（Ｂｒ・δ）およ
び保磁力（Ｈｃ）は同一にすべきであるので、供試磁気
ディスク１１〜１３のそれぞれについて、Ｂｒ・δおよ
びＨｃが供試磁気ディスク１のそれと路間−となるよう
にＣｒ膜および磁性膜の成膜を行った。In addition, in order to properly compare the noise characteristics of each test magnetic disk, the product of magnetic flux density and film thickness (Br・δ) and coercive force (Hc) should be the same. For each of the magnetic disks 11 to 13, a Cr film and a magnetic film were formed so that Br.delta. and Hc were within the same range as those of the magnetic disk under test 1.
（ＩＩ）ノイズ特性の比較試験
各供試磁気ディスク１および１１〜１３に信号を記録し
、再生時のバックグランドノイズのスペクトルをスペク
トルアナライザーにより分析する。但し、記録周波数は
２．５ Ｍ）Ｉｚおよび７．０ ＭＨｚ、ディスク回転
数は２７００ｒｐｍ、記録電流は４５ｍＡρ−ｐ、ヘッ
ドは薄膜ヘッドである。また、スペクトルアナライザー
の中心周波数は５Ｍｔｌｚ、周波数スパンは１０ＭＩＩ
ｚ、分解能は３０Ｋｌｌｚである。(II) Comparison Test of Noise Characteristics Signals are recorded on each test magnetic disk 1 and 11 to 13, and the spectrum of background noise during reproduction is analyzed using a spectrum analyzer. However, the recording frequency was 2.5 M)Iz and 7.0 MHz, the disk rotation speed was 2700 rpm, the recording current was 45 mAρ-p, and the head was a thin film head. In addition, the center frequency of the spectrum analyzer is 5Mtlz, and the frequency span is 10MII.
z, resolution is 30 Kllz.
各供試磁気ディスクの測定結果を第１図（磁気ディスク
１）、第２図（磁気ディスク１１）、第３図（磁気ディ
スク１２）および第４図（磁気ディスク１３）に示す。The measurement results for each test magnetic disk are shown in FIG. 1 (magnetic disk 1), FIG. 2 (magnetic disk 11), FIG. 3 (magnetic disk 12), and FIG. 4 (magnetic disk 13).
図中、Ａ１は記録周波数７．０ＭＨｚのときの変調ノイ
ズ、Ａ２は記録周波数２．５ＭＨｚのときの変調ノズル
、Ｂはシステムノイズである。各図の比較から、（１′
ｉ性膜がＣｏＮｌＣｒＰ合金である発明例の磁気ディス
ク１（第１図）は、ＣｏＮｉ合金磁性膜の磁気ディスク
１１ （第２図）、ＣｏＮｉＣｒ合金磁性膜の磁気ディ
スク１２（第３図）のようにＰを含まない従来品に比べ
て、そのノイズが大きく低減していることがわかる。更
に、注目すべきことは、磁気ディスク１３（第４図）の
ように、Ｃｒを含まないＣｏＮｉ系合金にＰを添加した
場合のノイズ低減効果は小さく、これに対してＣ。In the figure, A1 is the modulation noise when the recording frequency is 7.0 MHz, A2 is the modulation nozzle when the recording frequency is 2.5 MHz, and B is the system noise. From the comparison of each figure, (1'
The magnetic disk 1 (Fig. 1) of the invention example in which the i-based film is a CoNlCrP alloy is similar to the magnetic disk 11 (Fig. 2) made of a CoNi alloy magnetic film and the magnetic disk 12 (Fig. 3) made of a CoNiCr alloy magnetic film. It can be seen that the noise is significantly reduced compared to the conventional product that does not contain P. Furthermore, it should be noted that when P is added to a CoNi-based alloy that does not contain Cr, as in the magnetic disk 13 (FIG. 4), the noise reduction effect is small;
ＮｉＣｒ系合金にＰを添加した発明例の磁気ディスク１
のノイズ低減効果が顕著であることである。Invention example magnetic disk 1 in which P is added to NiCr-based alloy
The noise reduction effect is remarkable.
実上拠又
ＣｏＮｉＣｒＢ１合金をターゲットとし、ＣＯＯ，６８
Ｎ ｉｏ、ｚｃ ｒｏ、＋Ｂ ！ｏ、ｏｚ合金磁性膜を
形成した点を除いて前記実施例１の供試磁気ディスクｌ
と同一の条件で供試磁気ディスク２を製造し、記録再生
時のバックグランドノイズのスペクトル分析を実施例１
と同一の条件で行った結果、実施例１の供試磁気ディス
ク１と同等の改良されたノイズ特性を有することが観察
された。In fact, targeting CoNiCrB1 alloy, COO,68
N io, zc ro, +B! The test magnetic disk l of Example 1 except that an o, oz alloy magnetic film was formed.
A test magnetic disk 2 was manufactured under the same conditions as in Example 1, and a spectrum analysis of background noise during recording and reproduction was performed.
As a result, it was observed that the test magnetic disk 1 had improved noise characteristics equivalent to those of the test magnetic disk 1 of Example 1.
本発明の磁気記録媒体は、ＣｏＮｉＣｒ三元合金磁性膜
のすぐれた磁気特性・電気特性と、その３元合金磁性膜
を凌ぐ良好なノイズ特性を有しており、再生波形相互の
干渉によるピークシフトに変化を与えずに、ノイズによ
るピークシフトが大幅に改善され、従って磁気記録の−
そうの高密度化、磁気記録媒体のコンパクト化、高品質
・高性能化を可能とするものである。The magnetic recording medium of the present invention has excellent magnetic properties and electrical properties of a CoNiCr ternary alloy magnetic film, as well as good noise characteristics superior to those of the ternary alloy magnetic film, and peak shift due to mutual interference of reproduced waveforms. The peak shift due to noise is significantly improved without any change in the magnetic recording.
This makes it possible to increase the density of magnetic recording media, make magnetic recording media more compact, and improve quality and performance.
第１図〜第４図は、磁気ディスクの記録再生時のバック
グランドノイズスペクトル分析を示すグラ゛フである。1 to 4 are graphs showing background noise spectrum analysis during recording and reproduction of a magnetic disk.
Claims (1)
媒体において、該金属系磁性膜が、非固溶性ないしは低
固溶性の非磁性元素が添加されたＣｏＮｉＣｒ系合金か
らなることを特徴とするノイズ特性にすぐれた金属薄膜
型磁気記録媒体。1. A magnetic recording medium in which a metal-based magnetic film is formed on a non-magnetic substrate, characterized in that the metal-based magnetic film is made of a CoNiCr-based alloy to which a non-solid-soluble or low-solid-soluble non-magnetic element is added. A metal thin film magnetic recording medium with excellent noise characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5704388A JPH01232517A (en) | 1988-03-10 | 1988-03-10 | Thin metallic film type magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5704388A JPH01232517A (en) | 1988-03-10 | 1988-03-10 | Thin metallic film type magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01232517A true JPH01232517A (en) | 1989-09-18 |
Family
ID=13044418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5704388A Pending JPH01232517A (en) | 1988-03-10 | 1988-03-10 | Thin metallic film type magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01232517A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5516547A (en) * | 1991-09-06 | 1996-05-14 | International Business Machines Corporation | Method for fabricating magnetic recording medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62298919A (en) * | 1986-06-18 | 1987-12-26 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
-
1988
- 1988-03-10 JP JP5704388A patent/JPH01232517A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62298919A (en) * | 1986-06-18 | 1987-12-26 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5516547A (en) * | 1991-09-06 | 1996-05-14 | International Business Machines Corporation | Method for fabricating magnetic recording medium |
| US5658680A (en) * | 1991-09-06 | 1997-08-19 | International Business Machines Corporation | Magnetic recording medium and its fabrication method |
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