JPS6124004A - Magnetic head for vertical magnetic recording and reproduction - Google Patents
Magnetic head for vertical magnetic recording and reproductionInfo
- Publication number
- JPS6124004A JPS6124004A JP14532184A JP14532184A JPS6124004A JP S6124004 A JPS6124004 A JP S6124004A JP 14532184 A JP14532184 A JP 14532184A JP 14532184 A JP14532184 A JP 14532184A JP S6124004 A JPS6124004 A JP S6124004A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic pole
- hall element
- reproduction
- 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
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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/37—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using galvano-magnetic devices, e.g. Hall-effect devices using Hall or Hall-related effect, e.g. planar-Hall effect or pseudo-Hall effect
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、垂直磁気記録において、信号を記録、再生
するための磁気ヘッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic head for recording and reproducing signals in perpendicular magnetic recording.
第１図は例えば特開昭５４−５１８１０号公報に示され
た従来の垂直磁気記録ヘッド・媒体系を示す断面図であ
り、図において、１は記録用媒体であり、これは、ポリ
エステルなどからなる基体２と、パーマロイな“どの軟
磁性膜３と、Ｃｏ−Ｃｒなど垂直磁気異方性を有する硬
磁性膜４とから構成されている。５はパーマロイなどの
軟磁性膜からなる主磁極、７はフェライトなどからなる
軟磁性厚膜であり、これは補助磁極となっている。６は
該軟磁性厚膜７に巻回されたコイル、６ａ、６ｂは該コ
イル６の両端の端子である。FIG. 1 is a cross-sectional view showing a conventional perpendicular magnetic recording head/medium system disclosed in, for example, Japanese Patent Application Laid-Open No. 54-51810. In the figure, 1 is a recording medium, which is made of polyester or the like. A soft magnetic film 3 such as permalloy, and a hard magnetic film 4 having perpendicular magnetic anisotropy such as Co-Cr. Reference numeral 5 denotes a main pole made of a soft magnetic film such as permalloy; 7 is a soft magnetic thick film made of ferrite or the like, which serves as an auxiliary magnetic pole. 6 is a coil wound around the soft magnetic thick film 7, and 6a and 6b are terminals at both ends of the coil 6. .
次に動作について説明する。Next, the operation will be explained.
コイル６を流れる電流により発生する磁界で補助磁極７
が磁化する。補助磁極７表面から出た磁束は、裏打ちの
軟磁性層３を通り、硬磁性層４を垂直に横切り、該硬磁
性層４に信号を記録し、主磁極５の先端に流れ込む。The auxiliary magnetic pole 7 is generated by the magnetic field generated by the current flowing through the coil 6.
becomes magnetized. The magnetic flux emitted from the surface of the auxiliary magnetic pole 7 passes through the lining soft magnetic layer 3, perpendicularly crosses the hard magnetic layer 4, records a signal on the hard magnetic layer 4, and flows into the tip of the main magnetic pole 5.
第２図は、上記垂直磁気記録ヘッドの再生時の磁束の流
れを計算機シミュレーションにより求めたものであり、
硬磁性層４の磁化からの磁束２４は上記書込み時と同様
な磁路を流れる。そして、コイル６を周回する磁束の変
化量がコイル６の両端６ ａ ＊ ６ ｂの電圧変化
として現われ、再生信号として検出される。FIG. 2 shows the flow of magnetic flux during reproduction in the perpendicular magnetic recording head, obtained by computer simulation.
The magnetic flux 24 from the magnetization of the hard magnetic layer 4 flows through the same magnetic path as during writing. Then, the amount of change in the magnetic flux circulating around the coil 6 appears as a voltage change at both ends 6a*6b of the coil 6, and is detected as a reproduction signal.
従来の垂直記録用ヘッドは以上のように構成されている
ので、再生出力を増すためにコイル６の巻き数を増やす
と、ヘッドインダクタンスが増加し、高謂波の信号が記
録再生できなくなるという欠点があった。Conventional perpendicular recording heads are constructed as described above, so if the number of turns of the coil 6 is increased in order to increase the reproduction output, the head inductance increases, making it impossible to record and reproduce high-frequency signals. was there.
また、従来のホール素子自体のみをヘッドとして使用す
る型のホール素子ヘッドでは、ヘッドと媒体の摺動によ
りヘッド特性が劣化したり、ホール素子自体の分解能を
上げることが技術的に難しいという欠点があった。In addition, conventional Hall element heads that use only the Hall element itself as a head have the disadvantage that head characteristics deteriorate due to sliding between the head and the medium, and that it is technically difficult to increase the resolution of the Hall element itself. there were.
この発明は上記のような従来のものの欠点を除去するた
めになされたもので、記録は従来の通りに行ない、再生
は、主磁極に対向した補助磁極の下面にホール素子を配
置して、該ホール素子にてこれを行なうことにより、高
周波で高い出力を得ることを可能とする垂直磁気記録再
生用磁気へラドを提供することを目的としている。This invention was made in order to eliminate the drawbacks of the conventional ones as described above. Recording is performed in the conventional manner, and reproduction is carried out by placing a Hall element on the lower surface of the auxiliary magnetic pole opposite to the main magnetic pole. The object of the present invention is to provide a magnetic head for perpendicular magnetic recording and reproducing that makes it possible to obtain high output at high frequencies by using a Hall element.
以下、この発明の実施例を図について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第４図は本発明の一実施例による垂直磁気記録再生゛用
°磁気ヘッド
毒力ヲヰ及び媒体系の断面図、第５図は上記実施例のホ
ール素子を示す斜視図であり、両図において、１は記録
用媒体であり、これはポリエステルなどから成る基体２
と、パーマロイなどから成る軟磁性１１１３と、Ｇｏ−
Ｃｒなどから成る硬磁性膜４とから構成されている。５
はパーマロイなどの軟磁性膜から成る主磁極、６はコイ
ル、６ａ、６ｂはコイル６の両端の端子、７はフェライ
トなどからなる軟磁性厚膜であり、これは主磁極５の上
方にてその主磁極５に対向して設けられ、コイル６を有
する補助磁極となっている。８は補助磁極７下面に取付
けられたホール素子であり、これは硬磁性膜４に信号磁
化として記録された記録信号に主磁極５が近づいたとき
発生される磁束を検出し、再生信号を出力するものであ
る。９ａ、９ｂはホール素子８のセンス電流の印加端子
、１０ａ。FIG. 4 is a cross-sectional view of a magnetic head for perpendicular magnetic recording and reproducing according to an embodiment of the present invention and a medium system, and FIG. 5 is a perspective view showing the Hall element of the above embodiment. 1 is a recording medium, which is a substrate 2 made of polyester or the like.
, soft magnetic 1113 made of permalloy, etc., and Go-
It is composed of a hard magnetic film 4 made of Cr or the like. 5
6 is a coil, 6a and 6b are terminals at both ends of the coil 6, and 7 is a soft magnetic thick film made of ferrite, etc., which is located above the main pole 5. It is provided opposite to the main magnetic pole 5 and serves as an auxiliary magnetic pole having a coil 6. 8 is a Hall element attached to the lower surface of the auxiliary magnetic pole 7, which detects the magnetic flux generated when the main magnetic pole 5 approaches the recording signal recorded as signal magnetization on the hard magnetic film 4, and outputs a reproduced signal. It is something to do. 9a and 9b are terminals for applying sense current of the Hall element 8, and 10a.
ｌＯｂはホール素子８の出力端子である。lOb is the output terminal of the Hall element 8.
次に動作について説明する。Next, the operation will be explained.
記録時に、コイル６に電流が流れ、これにより補助磁極
７が磁化され、該磁極７からの磁束により硬磁性層４に
信号が記録されるのは上記従来の場合と同様である。During recording, a current flows through the coil 6, thereby magnetizing the auxiliary magnetic pole 7, and a signal is recorded on the hard magnetic layer 4 by the magnetic flux from the magnetic pole 7, as in the conventional case described above.
第２図は再生時の磁気ヘッドの磁束の流れを計算機シミ
ュレーションにより求めたもの、第３図は上記再生時の
磁束の流れの模式図である。FIG. 2 shows the flow of magnetic flux in the magnetic head during reproduction obtained by computer simulation, and FIG. 3 is a schematic diagram of the flow of magnetic flux during reproduction.
再生時には、まず媒体１の硬磁性層４に記録された信号
磁化１４の位置に主磁極５が近づくと、主磁極＠ｄの分
だけの磁化から磁束２４が引き出され、これは裏打ちの
軟磁性層３を通り、補助磁極７の前面に広がり流れ込む
。その時、上記磁束２４がホール素子８を横切り、該ホ
ール素子両端１０ａ、１０ｂに信号出力があられれる。During reproduction, when the main magnetic pole 5 approaches the position of the signal magnetization 14 recorded in the hard magnetic layer 4 of the medium 1, magnetic flux 24 is extracted from the magnetization of the main magnetic pole @d, and this is caused by the soft magnetic backing. It passes through the layer 3 and spreads out to the front surface of the auxiliary magnetic pole 7. At that time, the magnetic flux 24 crosses the Hall element 8, and a signal is output at both ends 10a, 10b of the Hall element.
このように本実施例では、ホール素子８を補助磁極７の
記録媒体側端に設け、該素子８と媒体１とが直接に接触
することのないようにし、かつ該素子８に再生信号を出
力させるようにしたので、ホール素子ヘッドのようにホ
ール素子自体の分解能にはよらず、主磁極５の膜厚、磁
気特性によりヘッドの分解能を決定でき、その結果高分
解能、高出力の磁気ヘッドが実現できる。As described above, in this embodiment, the Hall element 8 is provided at the end of the auxiliary magnetic pole 7 on the recording medium side, so that the element 8 and the medium 1 do not come into direct contact, and the reproduction signal is output to the element 8. As a result, the resolution of the head can be determined by the film thickness and magnetic properties of the main magnetic pole 5, rather than by the resolution of the Hall element itself, unlike Hall element heads.As a result, a high resolution, high output magnetic head can be achieved. realizable.
（発明の効果〕
以上のように、この発明に係る垂直磁気記録再生用磁気
ヘッドによれば、主磁極に対向した補助磁極の下面にホ
ール素子を設け、該ホール素子にて再生を行なうように
したので、出力の大きな再生出力を得ることができる効
果がある。また、ホール素子が直接媒体と摺動しないた
め信頼性もよい。さらに、直接媒体と摺動する主磁極の
分解能にて再生分解能が決定されるため、高分解能のヘ
ッドを得ることができる効果がある。(Effects of the Invention) As described above, according to the magnetic head for perpendicular magnetic recording and reproducing according to the present invention, a Hall element is provided on the lower surface of the auxiliary magnetic pole facing the main magnetic pole, and reproduction is performed using the Hall element. Therefore, it is possible to obtain a large reproduction output.In addition, reliability is good because the Hall element does not directly slide against the medium.Furthermore, the reproduction resolution is determined by the resolution of the main pole that directly slides against the medium. is determined, which has the effect of making it possible to obtain a high-resolution head.
第１図は従来の垂直磁気記録ヘッド・媒体系を示す断面
図、第２図は従来及び本実施例における磁気ヘッドの再
生時の磁束の流れを計算機シミュレーションにより求め
た図、第３図は本発明の一実施例による垂直磁気記録再
生用磁気ヘッドの再生時の磁束の流れの模式図、第４図
は上記実施例の磁気ヘッド及び媒体系の断面図、第５図
は上記実施例のホール素子部の斜視図である。
１・・・記録媒体、５・・・主磁極、６・・・記録用コ
イル、７・・・補助磁極、８・・・ホール素子、２４・
・・磁束。
なお図中同一符号は同−又は相当部分を示す。Figure 1 is a cross-sectional view showing a conventional perpendicular magnetic recording head/medium system, Figure 2 is a diagram obtained by computer simulation of the flow of magnetic flux during reproduction in the magnetic heads of the conventional and this embodiment, and Figure 3 is a diagram of the present invention. A schematic diagram of the flow of magnetic flux during reproduction in a magnetic head for perpendicular magnetic recording and reproduction according to an embodiment of the invention, FIG. 4 is a sectional view of the magnetic head and medium system of the above embodiment, and FIG. 5 is a hole diagram of the above embodiment. It is a perspective view of an element part. DESCRIPTION OF SYMBOLS 1... Recording medium, 5... Main magnetic pole, 6... Recording coil, 7... Auxiliary magnetic pole, 8... Hall element, 24...
...magnetic flux. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
の上方にて該主磁極に対向して設けられ記録用コイルを
有する補助磁極と、該補助磁極の下面に取付けられ上記
主磁極が記録媒体の記録信号に近づいたとき発生される
磁束から再生信号を出力するホール素子とを備えたこと
を特徴とする垂直磁気記録再生用磁気ヘッド。(1) A main magnetic pole made of a high magnetic permeability soft magnetic thin film, an auxiliary magnetic pole that is provided above the main magnetic pole and opposite to the main magnetic pole and has a recording coil, and an auxiliary magnetic pole that is attached to the lower surface of the auxiliary magnetic pole and that is attached to the main magnetic pole. 1. A magnetic head for perpendicular magnetic recording and reproduction, comprising a Hall element that outputs a reproduction signal from a magnetic flux generated when a magnetic pole approaches a recording signal of a recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14532184A JPS6124004A (en) | 1984-07-11 | 1984-07-11 | Magnetic head for vertical magnetic recording and reproduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14532184A JPS6124004A (en) | 1984-07-11 | 1984-07-11 | Magnetic head for vertical magnetic recording and reproduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6124004A true JPS6124004A (en) | 1986-02-01 |
Family
ID=15382453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14532184A Pending JPS6124004A (en) | 1984-07-11 | 1984-07-11 | Magnetic head for vertical magnetic recording and reproduction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6124004A (en) |
-
1984
- 1984-07-11 JP JP14532184A patent/JPS6124004A/en active Pending
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