JPS6381614A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS6381614A JPS6381614A JP22612286A JP22612286A JPS6381614A JP S6381614 A JPS6381614 A JP S6381614A JP 22612286 A JP22612286 A JP 22612286A JP 22612286 A JP22612286 A JP 22612286A JP S6381614 A JPS6381614 A JP S6381614A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- alloy
- flux density
- layers
- contg
- 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 26
- 229910001257 Nb alloy Inorganic materials 0.000 claims abstract description 21
- 229910020517 Co—Ti Inorganic materials 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 12
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000004544 sputter deposition Methods 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 238000001755 magnetron sputter deposition Methods 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000696 magnetic material Substances 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
- 230000001133 acceleration 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
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発す■は磁気ヘッドに１′Ａシ、さらに詳しくは磁気
へ、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 the structure of the gap portion between 1'A and 1'A in a magnetic head, and more specifically, the structure of the gap between the magnetic head and the magnetic head.
（従来技術）
現在、磁気記録再生？Ａｆａ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 magnetic recording and reproduction? In Afa, magnetic heads for both recording and reproduction, in which recording and reproduction are performed by the same magnetic head, are widely used from the viewpoint of reducing production costs and simplifying the device.
磁気ヘッドのギャップ長は、記録時には配備効率の面か
ら大きい方が良いが、ｐｆ生時には短波技の信号を十分
に再生できるように小さい方が良い、従って、兼用型の
磁気記録ヘッドのギャップ長は各専用磁気ヘッドの中間
にコシ定されるため、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。It is better for the gap length of the magnetic head to be large during recording in terms of deployment efficiency, but for PF generation it is better to be small so that shortwave signals can be sufficiently reproduced. Therefore, the gap length of the dual-purpose magnetic recording head is Since the magnetic head is fixed between each dedicated magnetic head, it has a defect in that its characteristics are inferior to those of the dedicated magnetic head in both recording and reproduction.
この問題を解決するために可変ギャップをイＩする記録
再生兼用磁気ヘッドが提案されている（特開昭８０−８
６３１０号′Ｊ）、すなわち、 ｒａ気ヘッドのギャッ
プ部にヘッド本体部よりも飽和磁束密度の小さい磁性層
を挿入した構造の磁気ヘッドを用い、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ｌａ％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個の磁気ヘッドと同等の特性を有する点
ですぐれたものである。To solve this problem, a recording/reproducing magnetic head with a variable gap has been proposed (Japanese Patent Laid-Open No. 80-808).
No. 6310'J), that is, a magnetic head with a structure in which a magnetic layer with a saturation magnetic flux density lower than that of the head body is inserted into the gap of the RA head, and this magnetic layer is strong against the large magnetic flux applied during recording. The magnetic layer is saturated, thereby effectively operating as a magnetic head with a large gap length, and the magnetic flux applied from a recording medium such as a la% disk during playback does not saturate this magnetic layer, thereby allowing a small 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 characteristics equivalent to two magnetic heads dedicated to recording and reproduction.
（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、！８１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ｌ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
率磁性層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本体工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−３ｌ−Ａ１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) The structure near the gap of the above variable gap magnetic head is! As shown in Figure 81, the main body 1 is made of a high permeability magnetic material with a large saturation magnetic flux density, and the main body 1 is made of a high permeability magnetic material with a large saturation magnetic flux density.
A high permeability magnetic layer 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 (a second The 6-body structure consisting of 2. (Fig.) is usually composed of Permalloy (Ni-Fe alloy) with ferrite as the base, Sendust (Fe-3l-A1 alloy) with ferrite as the base, ferrite, etc., and the magnetic layer 2. 2 is made of garnet or the like.
このように１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１
９！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。As described above, 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 the materials of the main body and the magnetic layer are different.
9! This means that the wear is uneven and wears out 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０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) It is an object of the present invention to economically manufacture a magnetic head for both recording and reproducing with a variable gap length.Another object of the present invention is to economically manufacture a magnetic head of this type that does not wear out on one side. The purpose is to provide.
（発明の概要）
本発明の８１気ヘツドは、 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Ｃｏ −Ｔ ｉ −Ｎ ｂ合金層を形成し
１次いでその表面に高透磁率で低飽和磁束密度のＣｏ−
Ｔｉ−Ｎｂ合金層を形成したことを特徴とする。(Summary of the Invention) The 81C head of the present invention uses an inexpensive ferrite as the main body, and forms a Co-Ti-Nb alloy layer with high magnetic permeability and high saturation magnetic flux density on the abutting surfaces of the gap. Then Co-layer with high magnetic permeability and low saturation magnetic flux density is coated on the surface.
It is characterized by forming a Ti-Nb alloy layer.
（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及びＴｉ金含有廣が違うだけ
であるから同一の製造手法により両磁性層を容易に製造
することかでさ、経済性が高くなり、？ａ気ヘッドのコ
ストを砥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、磁気ヘッドの片減り摩
耗が無くなる。(Summary of Effects) According to the above configuration, the magnetic layer with high saturation magnetic flux density and the magnetic layer with low saturation magnetic flux density differ only in the width of the CO and Ti gold content, so it is easy to manufacture both magnetic layers using the same manufacturing method. Is it more economical to manufacture it? The cost of the a-air head can be reduced. Furthermore, since the mechanical properties of both magnetic layers are almost not different, there is no uneven wear of the magnetic head.
（発明の詳細な説明）
本発明者等の研究によると、Ｃｏ −Ｔ ｉ −Ｎ ｂ
合金の組成を変化させることにより高飽和磁束密度の磁
性層と迭磁束密度の磁性層を構成できることが判明した
。こうした磁性層は録音、再生時に高Ａ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 the research of the present inventors, Co - Ti - N b
It has been found that by changing the composition of the alloy, a magnetic layer with a high saturation magnetic flux density and a magnetic layer with a low magnetic flux density can be constructed. Such a magnetic layer must have a high A magnetic coefficient during recording and reproduction, and 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
ャップ部に高透磁率のパーマロ仁センダストを用いるが
１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磁率で高飽和磁束密度
のＣｏ −Ｔ Ｉ −Ｎｂ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Ｃｏ−Ｔｉ−Ｎｂ
合金磁性層を形成する。Conventional magnetic heads usually use ferrite for the main body and high magnetic permeability permalonite Sendust for the gap part, but the present invention also uses inexpensive ferrite for the main body and high magnetic permeability for at least one side of the gap part. A Co-Ti-Nb alloy magnetic layer with high saturation magnetic flux density is formed on top of the Co-Ti-Nb alloy magnetic layer with equivalent high magnetic permeability and low saturation magnetic flux density.
Form an alloy magnetic layer.
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１本
発明では両磁性層が極めて近似した組成を宥するから、
同一の手法で両磁性層を形成するのが得策である０本発
明の実施例ではＲＦ−’グネトロンスバッタ法を用いた
。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 by the same method. In the embodiment of the present invention, the RF-'gnetron scattering method was used.
好ましい合金組成はＣｏ −Ｔ ｆ約８５ａ ｔＸに対
してＮｂ約１５ａｔ％が望ましく、Ｔｉは高飽和磁束密
度の合金についてはＣｏ−Ｔ Ｉ １００に対してＴｉ
１．０〜８ ａｔ％、低飽和磁束密度の合金について
はＴｉが６．１〜１２ａｔ％の含有場を有するものであ
る。しかし、一般的には両磁性層の間に十分な飽和磁束
密度の差があればよい。The preferred alloy composition is about 15 at% Nb for Co-T f about 85a t
1.0 to 8 at%, and alloys with a low saturation magnetic flux density have a Ti content field of 6.1 to 12 at%. However, in general, it is sufficient if there is a sufficient difference in saturation magnetic flux density between the two magnetic layers.
実施例
ｉ３図は本発明の磁気ヘッドの構成を示し、Ｍｎ−Ｚｎ
中結晶フェライトのヨーク１０のギャップ部の面にＴｉ
含有量の少ないＣｏ −Ｔ ｌ −Ｎ ｂ合金磁性層１
１が形成され、その上にＴｉ含有量の多いＣｏ −Ｔ
ｉ −Ｎ ｂ合金磁性層１２が形成されている。ギャン
ブ部１３にはＳ １０２ ギャップ材が用いられている
。これらの磁性層はＲＦ−Ｆグ・ネトロンスパッタ法に
より形成されている。Example i3 Figure shows the structure of the magnetic head of the present invention, in which Mn-Zn
Ti is applied to the gap surface of the medium crystal ferrite yoke 10.
Co-Tl-Nb alloy magnetic layer 1 with low content
1 is formed, and Co-T with a high Ti content is formed on top of it.
An i-Nb alloy magnetic layer 12 is formed. S 102 gap material is used in the gamb portion 13 . These magnetic layers are formed by RF-F netron sputtering.
ＣｏにＴｉを０．１ Ｎ１２ ａｔ％のＪｉで合力させ
たＣ ｏ −Ｔ ｉ −Ｎ ｂ合金（Ｎｂは１５ａｔ％
）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。Co-Ti-Nb alloy made by combining Co with Ti and 0.1 N12 at% Ji (Nb is 15 at%
) was manufactured and its magnetic properties were measured. Figure 4 shows the results.
飽和磁束密度はＴｉの含有率（Ｃｏ−Ｔｉ基帛）に対し
て直線的に減少する。 従って、なるべく低いＴｉ含有
率を有するＣｏ−Ｔｉ−Ｎｂ合金を第３図の磁性層１１
として用い、１２ａｔ％に近いＴｉ含有率を有するＣ
ｏ −Ｔ ｉ −Ｎ ｂ合金を磁性層１２に用いること
により、磁性層１２を録音時に飽和し、再生時に高進？
ａ率となる可変ギヤ−２プ手段として用いることができ
る。Ｃｏ−Ｔｉ基べｑでＴｉが１％よりも少ないか１２
％を越えると透磁率の低下が起き好ましくない、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。The saturation magnetic flux density decreases linearly with the Ti content (Co-Ti base). Therefore, a Co-Ti-Nb alloy having as low a Ti content as possible is used in the magnetic layer 11 of FIG.
C with a Ti content close to 12 at%
By using the o-T i -Nb alloy for the magnetic layer 12, the magnetic layer 12 is saturated during recording and has high acceleration during playback.
It can be used as a variable gear 2 gear mechanism with a rate of A. Ti is less than 1% in Co-Ti base q12
If it exceeds %, the magnetic permeability will decrease, which is undesirable.
An actual variable gap magnetic head can be configured as follows, for example.
ギャップ材 ＳｉＯ２０，４ＪＬギャップ深さ
１０ 終本体 Ｍ
ｎ −Ｚ ｎ単結晶フェライト磁性層１１（高Ｍ ｓ
） Ｃｏ ８１．８ａｔ！ ２８１ＬＴ ｔ ３
．４ ａｔ＄
Ｎｂ １５ ａｔ＄
磁性層１２ （低Ｍ ｓ ） Ｃｏ ７Ｂ、５ａｔＸ
ｔ ｏ。Gap material SiO20,4JL Gap depth 10 Final body M
n - Z n single crystal ferrite magnetic layer 11 (high M s
) Co 81.8at! 281LT t3
．． 4 at$ Nb 15 at$ Magnetic layer 12 (low M s ) Co 7B, 5atX
to.
Ｔ ｉ ８．５ ａｔ！
Ｎｂ １５ ａｔ＄
（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Ｔｉ含有量の多いＣｏ −Ｔ Ｉ
−Ｎ ｂ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Ｔｉ含有率量の少ないＣｏ−Ｔ
ｉ−Ｎｂ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。また両磁性
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、両磁性層の機械特
性は極めて近似しているから、片減りを生じない。T i 8.5 at! Nb 15 at$ (Function and Effect) As described above, the present invention uses Co-T I with a high Ti content to replace the magnetic layer 12 with a low saturation magnetic flux density that changes the effective gap.
- Magnetic layer 11 composed of Nb alloy and having high saturation magnetic flux density
Co-T with a small Ti content which closely approximates this
Since it is made of an i-Nb alloy, it can be easily manufactured by sputtering by simply changing the target. Furthermore, since the magnetic permeabilities of both magnetic layers exhibit almost the same high values, a magnetic head with good characteristics can be constructed. Furthermore, since the mechanical properties of both magnetic layers are extremely similar, no uneven wear occurs.
第１図及び第２図は従来の変動ギャップ磁気ヘッドのギ
ャップ部近傍の断面図、第３図は本発明の変動キャンプ
磁気ヘッドのギャップ部近傍の断面図、及び第４図は磁
性層の組成と磁気特性の関係を示すグラフである。1 and 2 are cross-sectional views near the gap of a conventional variable gap magnetic head, FIG. 3 is a cross-sectional view of the variable camp magnetic head of the present invention near the gap, and FIG. 4 is a composition of the magnetic layer. It is a graph showing the relationship between magnetic properties and magnetic properties.
Claims (3)
和磁束密度でＴｉ含有量が少ないＣｏ−Ｔｉ−Ｎｂ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
Ｔｉ含有量が多いＣｏ−Ｔｉ−Ｎｂ合金第２層を形成し
たことを特徴とする磁気ヘッド。(1) A Co-Ti-Nb alloy first layer with a high saturation magnetic flux density and a low Ti content is formed on at least one of the abutting surfaces of the gap part, and then a Co-Ti-Nb alloy first layer with a low saturation magnetic flux density and a Ti content lower than that of the first layer is formed. A magnetic head characterized in that a Co-Ti-Nb alloy second layer is formed with a large amount of Co-Ti-Nb alloy.
のＴｉを含有している前記第１項記載の磁気ヘッド。(2) The first layer is 1.0 to 6.0 at% based on Co-Ti
2. The magnetic head according to item 1 above, which contains Ti.
のである前記第１又は２項記載の磁気ヘッド。(3) The magnetic head according to item 1 or 2, wherein the second layer contains 6.1 to 12 at% Ti.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22612286A JPS6381614A (en) | 1986-09-26 | 1986-09-26 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22612286A JPS6381614A (en) | 1986-09-26 | 1986-09-26 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6381614A true JPS6381614A (en) | 1988-04-12 |
Family
ID=16840184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22612286A Pending JPS6381614A (en) | 1986-09-26 | 1986-09-26 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6381614A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6452765B1 (en) * | 1998-11-18 | 2002-09-17 | Read-Rite Corporation | CoNbTi as high resistivity SAL material for high-density MR |
-
1986
- 1986-09-26 JP JP22612286A patent/JPS6381614A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6452765B1 (en) * | 1998-11-18 | 2002-09-17 | Read-Rite Corporation | CoNbTi as high resistivity SAL material for high-density MR |
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