JPS61204813A - Magnetic head for vertical magnetic recording - Google Patents
Magnetic head for vertical magnetic recordingInfo
- Publication number
- JPS61204813A JPS61204813A JP4524985A JP4524985A JPS61204813A JP S61204813 A JPS61204813 A JP S61204813A JP 4524985 A JP4524985 A JP 4524985A JP 4524985 A JP4524985 A JP 4524985A JP S61204813 A JPS61204813 A JP S61204813A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic pole
- auxiliary
- pole
- edge part
- 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
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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
Abstract
Description
【発明の詳細な説明】
し産業上の利用分野コ
この発明は、磁気記録媒体と閉磁路を構成する垂直磁気
記録用磁気ヘッドの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an improvement in a magnetic head for perpendicular magnetic recording that forms a closed magnetic path with a magnetic recording medium.
［従来の技術］
このような垂直磁気記録用磁気ヘッドとして、特開昭５
２−１３４７０６に示ずにうな、主磁極と補助磁極が、
磁気記録媒体をはさんで、対向する磁気ヘッドが提案さ
れたが、記録再生に寄与する磁束が、空間を拡散する閉
磁路となっており、効率が良くなかった。この効率を改
善するために様１束の流れが閉磁路になるような磁気ヘ
ッドが提案されている。[Prior art] As such a magnetic head for perpendicular magnetic recording,
2-134706, the main magnetic pole and auxiliary magnetic pole are
A magnetic head that faces each other with a magnetic recording medium in between has been proposed, but the magnetic flux contributing to recording and reproduction forms a closed magnetic path that spreads through space, making it inefficient. In order to improve this efficiency, a magnetic head has been proposed in which the flow of a single flux forms a closed magnetic path.
第４図及び第５図は特開昭５２−８２３１８で示されて
いる閉磁路構成を持つ代表的な磁気ヘッドの従来例であ
り、第４図はその斜視図で、第５図はその断面図である
。Figures 4 and 5 show a conventional example of a typical magnetic head with a closed magnetic circuit configuration as shown in Japanese Patent Application Laid-Open No. 52-82318. Figure 4 is its perspective view, and Figure 5 is its cross section. It is a diagram.
図において、（１）は磁気記録媒体であり、（１ａ）の
ベース、（２）の磁化層、（３）のパーマロイ等からな
る高透磁率磁性体層から成っており、矢印の方向に走行
する。（４）は磁性薄膜よりなる磁気ヘッドの主磁極で
、磁気記録媒体（１）上に垂直に配置されている。また
、（５）は横１−字型をなすフェライト等の高透磁率材
からなる磁気ヘッドの補助磁極で、前記主磁極（４）の
先端面（４ａ）の面積よりも、充分広い対向而（５ａ）
を有し、前記主磁極（４）と同一平面−にに配置され、
ている。（５ｂ）は補助磁極（４５）の主磁極側エツジ
部である。（６）はコイルで、補助磁極（５）に施され
ている。なお、（７）は磁路を表わし、（８）は信号１
〜ラツクを表わす。In the figure, (1) is a magnetic recording medium, which consists of a base (1a), a magnetic layer (2), and a high permeability magnetic layer made of permalloy (3), which runs in the direction of the arrow. do. (4) is the main pole of the magnetic head made of a magnetic thin film, and is arranged perpendicularly above the magnetic recording medium (1). Further, (5) is an auxiliary magnetic pole of the magnetic head made of a high magnetic permeability material such as ferrite, which has a horizontal 1-shape, and has an opposing pole that is sufficiently wider than the area of the tip surface (4a) of the main magnetic pole (4). (5a)
and is arranged on the same plane as the main magnetic pole (4),
ing. (5b) is the edge portion of the auxiliary magnetic pole (45) on the main magnetic pole side. (6) is a coil, which is attached to the auxiliary magnetic pole (5). Note that (7) represents the magnetic path, and (8) represents the signal 1.
~Represents ease.
次に動作について説明する。Next, the operation will be explained.
記録時に、第５図の断面図に示すように補助磁極（５）
がコイル（６）によって励磁されると、磁路（７）は高
透磁率磁性体層（３）を通る閉磁路を構成するので、効
率良く主磁極（４）の先端面（４ａ）を飽和磁化レベル
まで駆動し、強い磁界を発生させる。ぞして、磁気記録
媒体（１）の磁化層（２）の表面に対し、垂直方向に磁
束を入射させることによって、磁化層（２）に記録する
ことができる。During recording, the auxiliary magnetic pole (5)
When excited by the coil (6), the magnetic path (7) forms a closed magnetic path passing through the high permeability magnetic layer (3), efficiently saturating the tip surface (4a) of the main pole (4). It is driven to the magnetization level and generates a strong magnetic field. Therefore, recording can be performed on the magnetic layer (2) of the magnetic recording medium (1) by injecting magnetic flux in the perpendicular direction to the surface of the magnetic layer (2).
再生時も、同様の閉磁路を構成することによって、記録
されている磁化層（２）の磁気的な変化を、コイル（６
）に効率よく誘導させることができる。During reproduction, by configuring a similar closed magnetic path, magnetic changes in the recorded magnetic layer (2) are transferred to the coil (6).
) can be efficiently guided.
［発明が解決しようとする問題点］
しかし、この閉磁路を有する磁気ヘッドは、主磁極（４
）の先端面（４ａ）と補助磁極（５）の対向面（５ａ）
が磁気記録媒体（１）の同一１−ラックを走行するため
に、閉磁路の磁気抵抗が一番小さい補助磁極（５）の主
磁極側エツジ部（５ｂ）で、主磁極（４）で記録された
信号を、再生時に拾い、再生波形が歪むなどの問題点が
あった。[Problems to be Solved by the Invention] However, this magnetic head with a closed magnetic path has a main magnetic pole (4
) and the opposing surface (5a) of the auxiliary magnetic pole (5).
In order to run on the same 1-rack of the magnetic recording medium (1), recording is performed with the main magnetic pole (4) at the main magnetic pole side edge part (5b) of the auxiliary magnetic pole (5) where the magnetic resistance of the closed magnetic path is the smallest. There was a problem that the reproduced signal was picked up during playback, distorting the playback waveform.
この発明は、上記のような問題点を解消するためになさ
れたもので、閉磁路の効率の良さを持ちながらも、補助
磁極によるトラック上での信号の再生による波形歪みを
取り除くことができる磁気ヘッドを得ることを目的とす
る。This invention was made in order to solve the above-mentioned problems, and, while having the efficiency of a closed magnetic circuit, it is possible to remove the waveform distortion caused by signal reproduction on the track by the auxiliary magnetic pole. Aim to get the head.
［問題点を解決するための手段］
この発明に係る垂直磁気記録用磁気ヘッドは、補助磁極
の主磁極側のエツジ部に、補助磁極を構成するコアより
透磁率の小さいコアを設けたものである。[Means for Solving the Problems] A magnetic head for perpendicular magnetic recording according to the present invention is provided with a core having a lower magnetic permeability than the core constituting the auxiliary magnetic pole at the edge portion of the auxiliary magnetic pole on the main magnetic pole side. be.
［作用］
この発明において、透磁率の小さいコアを設置−Ｊるこ
とにより、補助磁極の主磁極側のエツジ部に磁束が集中
し難くなり、補助磁極によるトラック上での信号の再生
による波形歪みをなくすことができる。[Function] In this invention, by installing a core with low magnetic permeability, magnetic flux becomes difficult to concentrate on the edge portion of the auxiliary magnetic pole on the main magnetic pole side, and waveform distortion due to signal reproduction on the track by the auxiliary magnetic pole is reduced. can be eliminated.
［発明の実施例］
以下、この発明の一実施例を第１図に基づいて説明する
。[Embodiment of the Invention] An embodiment of the invention will be described below with reference to FIG.
第１図は本発明の一実施例の垂直電気記録用磁気ヘッド
の斜視図、第２図はその断面図である。FIG. 1 is a perspective view of a magnetic head for perpendicular electric recording according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof.
図において、（１〉は上記従来例と全く同一の磁気記録
媒体であり、（１ａ）のベース及び（２）の磁化層及び
（３）のパーマロイ等からなる高透磁率磁性体層から成
っており、この磁気記録媒体（１）は、矢印の方向に走
行する。（４）はパーマロイ或いはアモルファス磁性合
金からなる高飽和磁束密度で、高透磁率の金属性薄膜か
らなる磁気ヘッドの主磁極であり、その先端面（４ａ）
は磁気記録媒体（１）の磁化層（２）に対向し、記録再
生作用を行う。この磁性薄膜よりなる主磁極（４）は、
（５）の横１−字型をなすフェライト等の高い透磁率材
からなる補助磁極の上部で接合される。In the figure, (1>) is a magnetic recording medium that is exactly the same as the conventional example described above, and consists of a base (1a), a magnetic layer (2), and a high permeability magnetic layer made of permalloy (3). This magnetic recording medium (1) runs in the direction of the arrow. (4) is the main magnetic pole of a magnetic head made of a thin metal film with high saturation magnetic flux density and high permeability made of permalloy or amorphous magnetic alloy. Yes, its tip surface (4a)
faces the magnetized layer (2) of the magnetic recording medium (1) and performs recording and reproducing operations. The main magnetic pole (4) made of this magnetic thin film is
(5) They are joined at the upper part of the auxiliary magnetic pole made of a material with high magnetic permeability such as ferrite, which forms a horizontal 1-shape.
なお、補助磁極（５）の対向面（５ａ）は、主磁極（４
）の先端面（４ａ）よりも広い面積を有するとともに、
補助磁極（５）の主磁極側エツジ部（５ｂ）の面に、補
助磁極（５）を構成するコアより透磁率の小さいコア（
５Ｃ）が併設される。Note that the opposing surface (5a) of the auxiliary magnetic pole (5) is opposite to the main magnetic pole (4).
) has a wider area than the tip surface (4a) of
On the surface of the main pole side edge part (5b) of the auxiliary pole (5), a core (
5C) will be attached.
（６）は補助磁極（５）に施されたコイルである。(6) is a coil applied to the auxiliary magnetic pole (5).
（７）は磁路を表わし、（７ａ）は補助磁極（５）の主
磁極側エツジ部（５ｂ）通る磁路、（７ｂ）は前記エツ
ジ部（５ｂ）以外の補助磁極を通る磁路を表わす。(7) represents a magnetic path, (7a) represents a magnetic path passing through the main pole side edge portion (5b) of the auxiliary magnetic pole (5), and (7b) represents a magnetic path passing through the auxiliary magnetic pole other than the edge portion (5b). represent.
この実施例では、配録及び再生時の磁路（７）は、高透
磁率磁性体層（３）を通る閉磁路を構成するので、第３
図に示す従来の磁気ヘッドと同様に、効率の良いヘッド
としての機能を維持する。In this embodiment, the magnetic path (7) during recording and reproduction constitutes a closed magnetic path passing through the high permeability magnetic layer (3), so the third
Like the conventional magnetic head shown in the figure, it maintains its function as an efficient head.
補助磁極（５）の主磁極側のエツジ部（５ｂ）を通る磁
路（７ａ）は、前記エツジ部（５ｂ）以外の補助磁極を
通る磁路（７ｂ）に比べで、磁路が短かくなる。しかし
、前記エツジ部（５ｂ）のコア（５Ｃ）の透磁率を小ざ
くすることにより、前記エツジ部（５ｂ）を通る磁路（
７ａ）の磁束の流れを小さくしてこのエツジ部（５ｂ）
に磁束が集中しないようにする。このようにして、再生
時に前記エツジ部（５ｂ）で記録信号を拾い難くするこ
とができる。The magnetic path (7a) passing through the edge portion (5b) on the main magnetic pole side of the auxiliary magnetic pole (5) is shorter than the magnetic path (7b) passing through the auxiliary magnetic pole other than the edge portion (5b). Become. However, by reducing the magnetic permeability of the core (5C) of the edge portion (5b), the magnetic path passing through the edge portion (5b) (
By reducing the flow of magnetic flux in 7a), this edge portion (5b)
Prevent magnetic flux from concentrating on the In this way, it is possible to make it difficult to pick up the recorded signal at the edge portion (5b) during reproduction.
第３図はこの発明の他の実施例の斜視図である。FIG. 3 is a perspective view of another embodiment of the invention.
図において゛、磁気ヘッドの主磁極（４）の前後に補助
磁極（５）を設け、それぞれの補助磁極（５）の主Ｉｉ
ＶＭ側エツジ部（５ｂ１．５ｂ２ ）の面に、透磁率の
小さいコア（５Ｇ１．５０２ ）を設けている。In the figure, auxiliary magnetic poles (5) are provided before and after the main magnetic pole (4) of the magnetic head, and the main Ii of each auxiliary magnetic pole (5) is
A core (5G1.502) with low magnetic permeability is provided on the surface of the VM side edge part (5b1.5b2).
このように構成することにより、再生時に補助磁極（５
）−の主磁極側エツジ部（５ｂ１．５ｂ２ ）で、記録
信号を拾い難くすることができるため、波形歪みを少な
くすることができるとともに、主磁極（４）の前後に補
助磁極（５）を設ｃ″Ｊたため、記録及び再生の効率を
向上することもできる。With this configuration, the auxiliary magnetic pole (5
) - It is possible to make it difficult to pick up the recorded signal at the main magnetic pole side edge part (5b1.5b2), so waveform distortion can be reduced. The recording and reproducing efficiency can also be improved because of the configuration.
［発明の効果コ
以上のように、この発明によれば、補助磁極の主磁極側
エツジ部の面に、透磁率の小さいコアを設けることで、
このエツジ部に磁束が集中しなくなり、再生時の信号の
波形歪みを少なくできる。[Effects of the Invention] As described above, according to the present invention, by providing a core with low magnetic permeability on the surface of the main pole side edge portion of the auxiliary pole,
Magnetic flux is no longer concentrated at this edge portion, and waveform distortion of the signal during reproduction can be reduced.
また、磁路が閉磁路を構成することから、記録及び再生
効率の良い垂直磁気記録用磁気ヘッドが得られる。Furthermore, since the magnetic path constitutes a closed magnetic path, a magnetic head for perpendicular magnetic recording with high recording and reproducing efficiency can be obtained.
第１図はこの発明の一実施例による垂直磁気記録用磁気
ヘッドを示す斜視図、第２図はその断面図、第３図はこ
の発明の他の実施例を示す斜視図、第４図は従来の磁気
記録用磁気ヘッドを示す斜視図、第５図はその断面図で
ある。
図において、
（１）・・・磁気記録媒体、
（４）・・・主磁極、
（５）・・・補助磁極、
（５ｂ〉・・・主磁極側エツジ部、
（５Ｃ）・・・透磁率の小さいコア、
である。
なお、図中、同−符号及び同一記号は、同一または相当
部分を示す。FIG. 1 is a perspective view showing a magnetic head for perpendicular magnetic recording according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a perspective view showing another embodiment of the invention, and FIG. FIG. 5 is a perspective view showing a conventional magnetic head for magnetic recording, and FIG. 5 is a sectional view thereof. In the figure, (1)...Magnetic recording medium, (4)...Main magnetic pole, (5)...Auxiliary magnetic pole, (5b>...Main magnetic pole side edge part, (5C)...Transparent A core with low magnetic flux. In the figures, the same reference numerals and the same symbols indicate the same or equivalent parts.
Claims (1)
路を構成する垂直磁気記録用磁気ヘッドにおいて、補助
磁極の主磁極側のエッジ部の面に、補助磁極を構成する
コアより透磁率の小さいコアを設けることを特徴とする
垂直磁気記録用磁気ヘッド。In a magnetic head for perpendicular magnetic recording in which a main magnetic pole, an auxiliary magnetic pole, and a magnetic recording medium constitute a closed magnetic path, the edge of the auxiliary magnetic pole on the main magnetic pole side has a magnetic permeability higher than that of the core that constitutes the auxiliary magnetic pole. A magnetic head for perpendicular magnetic recording characterized by having a small core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4524985A JPS61204813A (en) | 1985-03-07 | 1985-03-07 | Magnetic head for vertical magnetic recording |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4524985A JPS61204813A (en) | 1985-03-07 | 1985-03-07 | Magnetic head for vertical magnetic recording |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61204813A true JPS61204813A (en) | 1986-09-10 |
Family
ID=12713990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4524985A Pending JPS61204813A (en) | 1985-03-07 | 1985-03-07 | Magnetic head for vertical magnetic recording |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61204813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7561380B2 (en) * | 2003-09-26 | 2009-07-14 | Seagate Technology Llc | Transducing head including a magnetic element exhibiting varying permeability |
-
1985
- 1985-03-07 JP JP4524985A patent/JPS61204813A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7561380B2 (en) * | 2003-09-26 | 2009-07-14 | Seagate Technology Llc | Transducing head including a magnetic element exhibiting varying permeability |
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