JPS6381609A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS6381609A JPS6381609A JP22611786A JP22611786A JPS6381609A JP S6381609 A JPS6381609 A JP S6381609A JP 22611786 A JP22611786 A JP 22611786A JP 22611786 A JP22611786 A JP 22611786A JP S6381609 A JPS6381609 A JP S6381609A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- alloy
- layer
- flux density
- magnetic head
- 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
- 230000004907 flux Effects 0.000 claims abstract description 20
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 229910018598 Si-Co Inorganic materials 0.000 claims abstract description 7
- 229910008453 Si—Co Inorganic materials 0.000 claims abstract description 7
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000035699 permeability Effects 0.000 abstract description 15
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000001755 magnetron sputter deposition Methods 0.000 abstract description 3
- 238000004544 sputter deposition Methods 0.000 abstract description 3
- 238000010030 laminating Methods 0.000 abstract 1
- 229910000531 Co alloy Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910018523 Al—S Inorganic materials 0.000 description 2
- 229910000713 I alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910000702 sendust Inorganic materials 0.000 description 2
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- HYIMSNHJOBLJNT-UHFFFAOYSA-N nifedipine Chemical compound COC(=O)C1=C(C)NC(C)=C(C(=O)OC)C1C1=CC=CC=C1[N+]([O-])=O HYIMSNHJOBLJNT-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は磁気ヘッドに関し、さらに詳しくは磁気ヘッド
のギャップ部分の構造に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a magnetic head, and more particularly to the structure of a gap portion of a magnetic head.
（従来技術）
現在、磁気記録再生装置においては、生産コストの低減
、装置の簡素化などの面から、記録と再生を同一の磁気
ヘッドで行う記録再生兼用の磁気ヘッドが広く用いられ
ている。(Prior Art) Currently, in magnetic recording and reproducing devices, dual-purpose magnetic heads for recording and reproducing are widely used in order to reduce production costs and simplify the device.
磁気ヘッドのギャップ長は、記録時には記録効率の面か
ら大きい方が良いが、再生時には短波長の信号を十分に
再生できるように小さい方が良い、従って、兼用型のｒ
ａ９ｃ記録ヘッドのギャップ長は各専用磁気ヘッドの中
間に設定されるため、記録及び再生のいずれにおいても
専用磁気ヘッドよりも特性が劣るという欠陥があった。The gap length of the magnetic head should be large during recording from the standpoint of recording efficiency, but during playback it is better to have a small gap length so that short wavelength signals can be sufficiently reproduced.
Since the gap length of the a9c recording head is set between the respective dedicated magnetic heads, it has a defect in that its characteristics are inferior to those of the dedicated magnetic heads in both recording and reproduction.
この問題を解決するために可変ギャップを有する記録再
生兼用磁気ヘッドが提案されている（特開昭６０−６６
Ｓｉ０号等）、すなわち、磁気ヘッドのキャップ部にヘ
ッド本体部よりも飽和磁東密度の小さい磁性層を挿入し
た構造の′Ｅａ気ヘッドを用い、記録時に印加される大
きい磁束に対してはこの磁性層を飽和させ、それにより
実効的に大きいギャップ長を有する磁気ヘッドとして動
作させ、再生時に磁気ディスク等の記録媒体から加わる
磁束に対してはこの磁性層を飽和させず、それにより小
さいギャップ長を有する磁気ヘッドとして動作させるも
のである。この可変ギャップ磁気ヘッドは記録及び再生
専用の２個の磁気ヘッドと回等の特性を有する点ですぐ
れたものである。To solve this problem, a magnetic head for recording/reproducing with a variable gap has been proposed (Japanese Patent Laid-Open No. 60-66
In other words, we use an Ea head with a structure in which a magnetic layer with a lower saturation magnetic east density than that of the head body is inserted into the cap of the magnetic head. The magnetic layer is saturated, thereby operating as a magnetic head with an effectively large gap length, and the magnetic flux applied from a recording medium such as a magnetic disk during reproduction does not saturate this magnetic layer, thereby effectively reducing the gap length. The magnetic head is operated as a magnetic head having the following characteristics. This variable gap magnetic head is excellent in that it has two magnetic heads dedicated to recording and reproduction, and has characteristics such as rotation.
（従来技術の問題点）
上記の可変ギャップ磁気ヘッドのギャップ部近くの構造
は、第１図に示すように飽和磁束密度が大きい高透率磁
性材料より成る本体１と、ギャップ部において本体１の
対向面の一方に形成された飽和磁束密が小さい高透磁率
磁性７＃２、または第２図に示すように両面に形成され
た飽和磁束密度が小さい高透磁率磁性層２．２（第２図
）より成っている６本体１は通常フェライトを基体とす
るパーマロイ（Ｎｉ−Ｆｅ合金）、フェライトを基体と
するセンダスト（Ｆｅ−Ｓｉ −Ａ Ｉ合金）、フェラ
イト等で構成され、そして磁性層２．２はガーネット等
で構成されている。(Problems with the Prior Art) As shown in FIG. 1, the structure near the gap of the variable gap magnetic head described above includes a main body 1 made of a high permeability magnetic material with a large saturation magnetic flux density, and a main body 1 in the gap. A high permeability magnetic layer 7#2 with a low saturation magnetic flux density formed on one of the opposing surfaces, or a high permeability magnetic layer 2.2 with a low saturation magnetic flux density formed on both sides as shown in FIG. The main body 1 is usually made of ferrite-based permalloy (Ni-Fe alloy), ferrite-based sendust (Fe-Si-A I alloy), ferrite, etc., and the magnetic layer 2 .2 is made of garnet etc.
このように、本体とギャップ部の磁性層とは別々の材料
で構成されるため磁気ヘッドの製造に非常な手間がかか
る。他の問題点は本体と磁性層の材質が異なるために摩
耗が一様にならないで片減りし、特性の変化や目詰りな
どが起きることである。In this way, since the main body and the magnetic layer in the gap portion are made of different materials, it takes a lot of effort to manufacture the magnetic head. Another problem is that because the materials of the main body and the magnetic layer are different, the wear is uneven and wears unevenly, resulting in changes in characteristics and clogging.
（発明の目的）
本発明は実効的にギャップ長が可変の記録再生兼用磁気
ヘッドを経済的に製造することを目的とする。本発明の
他の目的は片減りのないこの種の磁気ヘッドを提供する
ことを目的とする。(Objective of the Invention) An object of the present invention is to economically manufacture a magnetic head for both recording and reproducing with an effectively variable gap length. Another object of the present invention is to provide a magnetic head of this type that does not wear out unevenly.
（発明の概要）
本発明の磁気ヘッドは、安価なフェライトを本体として
用い、そのギャップ部突き合せ面に高透磁率で高飽和磁
束密度のＦｅ−Ａ Ｉ−Ｓｉ −Ｇ 。(Summary of the Invention) The magnetic head of the present invention uses an inexpensive ferrite as a main body, and has Fe-A I-Si-G with high magnetic permeability and high saturation magnetic flux density on the abutting surface of the gap portion.
合金層を形成し１次いでその表面に、高透磁率でしかも
低飽和磁束密度のＦｅ−Ａ ｌ−Ｓ Ｉ −Ｃ。First, an alloy layer is formed on the surface of Fe-Al-S I-C with high magnetic permeability and low saturation magnetic flux density.
又はＦｅ−Ａｌ−３Ｌ合金層を形成したことを特徴とす
る。Alternatively, a Fe-Al-3L alloy layer is formed.
（効果の概要）
上記の構成によると、高飽和磁束密度の磁性層と低飽和
磁束密度の磁性層とはＣｏ含有量が違うだけあるから同
一の製造手法により両磁性層を容易に製造することがで
き、経済性が高くなり、磁気ヘッドのコストを低下する
ことができる。また両磁性層の機械的特性はほとんど異
ならないから、磁気へツーの片減り摩耗が無くなる。(Summary of Effects) According to the above configuration, since the magnetic layer with high saturation magnetic flux density and the magnetic layer with low saturation magnetic flux density differ in Co content, both magnetic layers can be easily manufactured using the same manufacturing method. This makes it possible to increase economic efficiency and reduce the cost of the magnetic head. Furthermore, since the mechanical properties of both magnetic layers are almost not different, there is no wear due to one side of the magnetic layer.
（発明の詳細な説明）
本発明者等の研究によると、低飽和磁束密度のＦｅ−Ａ
ｌ−５Ｌ合金にＣｏを添加することにより高飽和磁束密
度の磁性層を構成できことが判明した。こうした磁性層
は録音、再生時に高透磁率を持たなければならないが、
この磁性合金はこの要求も満足する。(Detailed Description of the Invention) According to research by the present inventors, Fe-A with low saturation magnetic flux density
It has been found that a magnetic layer with high saturation magnetic flux density can be constructed by adding Co to the l-5L alloy. These magnetic layers must have high magnetic permeability during recording and playback, but
This magnetic alloy also satisfies this requirement.
従来の磁気ヘッドは通常はフェライトを本体に用い、ギ
ャップ部に高透ｒａ率のパーマロイ、センダストを用い
るが、本発明でも本体には安価なフェライトを用い、ギ
ャップ部の少なくとも一方の面に高透Ｂ１率で高飽和磁
束密度のＦｅ−Ａｌ−５ｉ−Ｃｏ合金磁性層を形成し、
その上に同等の高透磁率と低飽和磁束密度のＦｅ−Ａｌ
−５Ｌ−Ｇｏ又はＦｅ−Ａｌ−Ｓｉ合金磁性層を形成す
る。Conventional magnetic heads usually use ferrite for the main body and high-permeability permalloy or sendust for the gap part, but the present invention also uses inexpensive ferrite for the main body and high-permeability material on at least one side of the gap part. Forming a Fe-Al-5i-Co alloy magnetic layer with a high saturation magnetic flux density at a B1 ratio,
On top of that, Fe-Al has the same high magnetic permeability and low saturation magnetic flux density.
-5L-Go or Fe-Al-Si alloy magnetic layer is formed.
これらの磁性層は、フェライトヨークのギャップ部突き
合せ面となる部分を基体として周知のスパッタ法による
成膜技術など任意の方法により製造できる。しかし、本
発明では両磁性層が極めて近似した組成を有するから、
同一の手法で両磁性層を形成するのが得策である６本発
明の実施例ではＲＦマグネトロンスパッタ法を用いた。These magnetic layers can be manufactured by any method such as a well-known sputtering film forming technique using the portion of the ferrite yoke that will be the abutting surface of the gap portion as a base. However, in the present invention, since both magnetic layers have extremely similar compositions,
It is advisable to form both magnetic layers using the same method.6 In the embodiment of the present invention, RF magnetron sputtering was used.
好ましい合金組成はＦｅ−Ａｌ−３Ｌ合金についてはＳ
ｉ ５〜１１ ｗ ｔ％、Ａ Ｉ ３．０−８．Ｏｖ
ｒ ｔ％、残部Ｆｅであり、Ｃｏ含有合金はこの組成に
全ｍ基準で３０ｗｔ％までＣｏを含有させたものである
。The preferred alloy composition is S for Fe-Al-3L alloy.
i 5-11 wt%, AI 3.0-8. Ov
r t%, the balance being Fe, and the Co-containing alloy is one in which Co is contained in this composition up to 30 wt% based on the total m.
実施例
第３図は本発明の磁気ヘッドの構成を示し、Ｍｎ−Ｚｎ
ｔｒｉ結晶フェライトのヨーク１０のギャップ部の面に
Ｃｏ含有量の多いＦｅ−Ａｌ−５ｉ−Ｃｏ合金磁性層１
１が形成され、その上にＦｅ −ＡＩ−Ｓｉ又はＣｏ金
含有％（７）少ないＦｅ−Ａｌ−３！−Ｃｏ合金磁性ｌ
９１２が形成されている。Embodiment FIG. 3 shows the structure of the magnetic head of the present invention, in which Mn-Zn
A Fe-Al-5i-Co alloy magnetic layer 1 with a high Co content is formed on the surface of the gap portion of the tri-crystal ferrite yoke 10.
1 is formed, on which Fe-AI-Si or Co gold content % (7) less Fe-Al-3! -Co alloy magnetic l
912 is formed.
ギャップ部１３にはＳｉＯギャップ材が用いられている
。これらの磁性層はＲＦマグネトロンスパッタ法により
形成されている。The gap portion 13 is made of SiO gap material. These magnetic layers are formed by RF magnetron sputtering.
Ｆｅ８６．５ｗｔ％、Ａ ｌ ５ 、 Ｏｗ ｔ％及び
Ｓ＋８．５ｗｔ％ノＦ ｅ −Ａ Ｉ −Ｓ Ｉ合金に
Ｃｏを０〜３５ｗｔ％の範囲で添加したＦｅ−Ａｌ−Ｓ
ｉ−Ｃｏを製造し、その磁気特性を測定した。第４図に
この結果を示す。Fe-Al-S with Co added in the range of 0 to 35 wt% to Fe-AI-S I alloy with Fe86.5wt%, Al5, Owt% and S+8.5wt%
i-Co was manufactured and its magnetic properties were measured. Figure 4 shows the results.
先ず比透磁率 はＣｏ ２５ ｗ ｔ％まで一定であり
、それ以上になると急激に減少する。約３０ｗｔ％以上
になると透磁率は小さくなり過ぎる。保磁力ＨＣも約３
０ｗｔ％以上で急激に大きくなる。一方、飽和磁束密度
はＣｏの含有率に対して直線的に増加する。従って、な
るべく ２５ ｗ ｔ％近＜ （７） Ｃｏ含有率を有
するＦｅ−Ａ Ｉ−５１−Ｃｏ合金を第３図の磁性層１
１として用い、Ｆｅ −Ａ Ｉ−５ｉ合金又はそれに近
いＣｏ合含有率Ｆｅ−Ａｌ−Ｓｉ−Ｃｏ合金を磁性層１
２に用いることにより、磁性層１２を録音時に飽和し、
再生時に高透磁率となる可変ギャップ手段として用いる
ことができる。First, the relative magnetic permeability is constant up to Co 25 wt%, and decreases rapidly above that point. If it exceeds about 30 wt%, the magnetic permeability becomes too small. Coercive force HC is also about 3
It increases rapidly above 0wt%. On the other hand, the saturation magnetic flux density increases linearly with the Co content. Therefore, if possible, a Fe-A I-51-Co alloy having a Co content of approximately 25 wt % < (7) is used in the magnetic layer 1 of FIG.
1, and a Fe-A I-5i alloy or a Fe-Al-Si-Co alloy with a Co content close to that is used as the magnetic layer 1.
2, the magnetic layer 12 is saturated during recording,
It can be used as a variable gap means that has high magnetic permeability during reproduction.
なお、実際の可変ギャップ磁気ヘッドは、例えば次のよ
うに構成できる。Note that an actual variable gap magnetic head can be configured as follows, for example.
ギャップ材 Ｓｉ０ ０．４ 体ギ
ヤツブ深さ １０ 川水体
Ｍ ｎ −Ｚ ｎ Ｆｎ結晶フェライト磁性Ｍ１
２（低Ｍ ｓ ） Ｆｅ８Ｇ、５ｗｔ％ ０．４
ＡＬＡｔ ５．０ｗｔ％
Ｓｉ ８．５ｗｔ％
磁性層１１（高Ｍ ｓ ） Ｆｅ６４．９ｗｔ％
２８ μＡＩ ３．？ ｗｔ：
Ｓｉ ６．４ｗｔ％
Ｃｏ ２５ｗｔ％
（作用効果）
以上のように、本発明は実効ギャップを変える低飽和磁
束密度の磁性層１２をＦｅ−Ａｌ−Ｓｉ合金またはＣｏ
含有量の少ないＦｅ−Ａｌ−Ｓｉ−Ｃｏ合金で構成し、
高飽和磁束密度の磁性層１１をこれに極めて近似したＦ
ｓ−Ａ Ｉ−３Ｌ −Ｃ。Gap material Si0 0.4 Body gear knob depth 10 River water body
M n -Z n Fn crystal ferrite magnetic M1
2 (low M s ) Fe8G, 5wt% 0.4
ALAt 5.0wt% Si 8.5wt% Magnetic layer 11 (high M s ) Fe64.9wt%
28 μAI 3. ? wt: Si 6.4wt% Co 25wt% (Effects) As described above, the present invention uses Fe-Al-Si alloy or Co as the magnetic layer 12 with a low saturation magnetic flux density that changes the effective gap.
Made of Fe-Al-Si-Co alloy with low content,
F which closely approximates the magnetic layer 11 with high saturation magnetic flux density
s-A I-3L-C.
合金によって構成したから、ターゲットを切換えるだけ
でスパッタ法で容易に製造できる。また青磁性層の透磁
率はほとんど同一の高い値を示すから特性の良い磁気ヘ
ッドを構成できる。さらに、青磁性層の機ＪＩＡ特性は
極めて近似しているから、片減りを生じない。Since it is made of an alloy, it can be easily manufactured by sputtering by simply changing the target. Furthermore, since the magnetic permeability of the celadon layer exhibits almost the same high value, a magnetic head with good characteristics can be constructed. Furthermore, since the mechanical JIA characteristics of the celadon magnetic layer are very similar, no uneven wear occurs.
Claims (3)
和磁束密度でＣｏ含有量が多いＦｅ−Ａｌ−Ｓｉ−Ｃｏ
合金第１層を形成し、次いで低飽和磁束密度で第１層よ
りもＣｏ含有量が少ないＦｅ−Ａｌ−Ｓｉ−Ｃｏ合金ま
たはＦｅ−Ａｌ−Ｓｉ合金第２層を形成したことを特徴
とする磁気ヘッド。(1) Fe-Al-Si-Co with high saturation magnetic flux density and high Co content is used on at least one of the abutting surfaces of the gap part.
A first alloy layer is formed, and then a Fe-Al-Si-Co alloy or Fe-Al-Si alloy second layer is formed with a low saturation magnetic flux density and a lower Co content than the first layer. magnetic head.
記第１項記載の磁気ヘッド。(2) The magnetic head according to item 1, wherein the first layer contains 30 wt% or less of Co.
０〜８．０ｗｔ％、Ｆｅ残部を基本組成とし、これに３
０ｗｔ％以下のＣｏを含有するものである前記第１項記
載の磁気ヘッド。(3) The first and second layers contain 5 to 11 wt% Si, 3.
The basic composition is 0 to 8.0 wt%, the balance of Fe, and 3
2. The magnetic head according to item 1, wherein the magnetic head contains 0 wt% or less of Co.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22611786A JPS6381609A (en) | 1986-09-26 | 1986-09-26 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22611786A JPS6381609A (en) | 1986-09-26 | 1986-09-26 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6381609A true JPS6381609A (en) | 1988-04-12 |
Family
ID=16840101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22611786A Pending JPS6381609A (en) | 1986-09-26 | 1986-09-26 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6381609A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01303614A (en) * | 1988-06-01 | 1989-12-07 | Fuji Elelctrochem Co Ltd | Magnetic head |
| JPH0254409A (en) * | 1988-08-18 | 1990-02-23 | Matsushita Electric Ind Co Ltd | Magnetic head |
-
1986
- 1986-09-26 JP JP22611786A patent/JPS6381609A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01303614A (en) * | 1988-06-01 | 1989-12-07 | Fuji Elelctrochem Co Ltd | Magnetic head |
| JPH0254409A (en) * | 1988-08-18 | 1990-02-23 | Matsushita Electric Ind Co Ltd | Magnetic head |
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