JPH0152806B2 - - Google Patents
Info
- Publication number
- JPH0152806B2 JPH0152806B2 JP9584981A JP9584981A JPH0152806B2 JP H0152806 B2 JPH0152806 B2 JP H0152806B2 JP 9584981 A JP9584981 A JP 9584981A JP 9584981 A JP9584981 A JP 9584981A JP H0152806 B2 JPH0152806 B2 JP H0152806B2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- core
- recording
- 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.)
- Expired
Links
- 230000005291 magnetic effect Effects 0.000 claims description 42
- 230000005294 ferromagnetic effect Effects 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 12
- 239000010409 thin film Substances 0.000 claims description 9
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000003302 ferromagnetic material Substances 0.000 claims description 2
- 239000013590 bulk material Substances 0.000 claims 1
- 239000010408 film Substances 0.000 description 11
- 230000005415 magnetization Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
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
Description
【発明の詳細な説明】
本発明は磁気ヘツドに関するものであり、特に
高密度磁気記録に好適な垂直磁気記録用磁気ヘツ
ドを提供するものである。すなわち本発明は回転
ヘツド装置等に搭載可能で実用的な記録再生兼用
磁気ヘツドを提供することを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head, and particularly provides a magnetic head for perpendicular magnetic recording suitable for high-density magnetic recording. That is, an object of the present invention is to provide a practical recording/reproducing magnetic head that can be mounted on a rotary head device or the like.
記録媒体を厚さ方向に磁化する垂直記録方式は
原理的に短波長程媒体内の減磁界が小さくなる為
に高密度記録に適している。このような垂直記録
を良好に行なうには垂直方向に強い異方性を有す
る記録媒体と強い垂直成分磁界を発生する記録ヘ
ツドが必要になる。 The perpendicular recording method, in which the recording medium is magnetized in the thickness direction, is suitable for high-density recording because, in principle, the shorter the wavelength, the smaller the demagnetizing field within the medium. To successfully perform such perpendicular recording, a recording medium having strong anisotropy in the perpendicular direction and a recording head that generates a strong perpendicular component magnetic field are required.
従来の垂直記録方式は第１図に示すように基本
構成からなつている。磁気記録媒体１は非磁性ベ
ース２の上に膜面内に磁化容易を有するパーマロ
イ等の強磁性薄膜３を介して膜面に垂直方向に磁
化容易軸を有する垂直磁化膜４が形成されたもの
である。磁気ヘツドは主磁極２０及び励磁巻線８
を有する補助磁極６からなり主磁極２０が垂直磁
化膜４に接するように記録媒体１をはさむ構造に
なつている（以下このヘツドを補助磁極励磁形垂
直ヘツドと呼ぶ）。信号を記録する際は、励磁巻
線８に流れる信号電流により強磁性体コア７を磁
化し、この強磁性体コア７の発生する磁界により
主磁極２０を磁化する。垂直磁化膜４は主磁極２
０の発生する強い磁界によつて垂直に磁化され
る。 The conventional perpendicular recording system has a basic configuration as shown in FIG. The magnetic recording medium 1 has a perpendicular magnetization film 4 having an axis of easy magnetization perpendicular to the film surface formed on a non-magnetic base 2 via a ferromagnetic thin film 3 such as permalloy that has easy magnetization in the film surface. It is. The magnetic head has a main pole 20 and an excitation winding 8
The recording medium 1 is sandwiched between the main magnetic pole 20 and the perpendicular magnetization film 4 so that the main magnetic pole 20 is in contact with the perpendicularly magnetized film 4 (hereinafter, this head will be referred to as an auxiliary magnetic pole excitation type vertical head). When recording a signal, the ferromagnetic core 7 is magnetized by the signal current flowing through the excitation winding 8, and the main magnetic pole 20 is magnetized by the magnetic field generated by the ferromagnetic core 7. The perpendicular magnetization film 4 is the main magnetic pole 2
It is magnetized perpendicularly by the strong magnetic field generated by zero.
このような補助磁極励磁形垂直ヘツドによれ
ば、垂直記録として優れた記録特性が得られ、更
に記録媒体として上述のような２層膜媒体を用い
ることにより効率のよい高密度記録が可能であ
る。 According to such an auxiliary pole-excited vertical head, excellent recording characteristics can be obtained for perpendicular recording, and furthermore, by using the above-mentioned two-layer film medium as the recording medium, efficient high-density recording is possible. .
しかし、上述のような補助磁極励磁形垂直ヘツ
ドではヘツドで記録媒体をはさむ構造になつてい
る為に応用範囲が限定され且つ実用化に際し種々
の問題が生じて来る。特に使用周波数帯域が広く
大きな相対速度を必要とするような場合、例えば
ビデオ信号やPCM信号の場合、通常はヘツドを
回転させる方式を用いるが上述のような構造では
実用化が困難である。 However, since the above-mentioned auxiliary pole-excited vertical head has a structure in which the recording medium is sandwiched between the heads, its range of application is limited and various problems arise when it is put into practical use. Particularly when the frequency band used is wide and requires a high relative speed, such as video signals or PCM signals, a method of rotating the head is usually used, but it is difficult to put it into practical use with the structure described above.
本発明は前記問題点を勘案してなされたもので
あり、記録媒体をはさむことなく、記録再生特性
の優れた垂直磁気記録再生用ヘツドを提供するも
のである。 The present invention has been made in consideration of the above-mentioned problems, and it is an object of the present invention to provide a perpendicular magnetic recording/reproducing head with excellent recording/reproducing characteristics without sandwiching a recording medium.
以下に本発明の実施例を図面でもつて説明す
る。第２図に示すように本実施例の磁気ヘツドの
基本構成は記録媒体入側コア９と記録媒体出側コ
ア１０がギヤツプ１４をはさんで対向したリング
形構造を有するものである。記録媒体入側コア９
はMn−Znフエライト等の強磁性体コア１１より
なり、記録媒体摺動面側からコア９がＵ字形にな
るように溝１５が形成されている。一方、出側コ
ア１０は例えばパーマロイ、センダスト等の強磁
性薄膜５からなつている。巻線は記録媒体出側コ
ア１０のまわりか、あるいは後部ギヤツプ近傍の
コアのまわりにほどこした第１の巻線１６と、Ｕ
字形をした記録媒体入側コア９の溝１５に対して
ギヤツプ側のコアのまわりにほどこした第２の巻
線１７を有している。 Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the basic structure of the magnetic head of this embodiment has a ring-shaped structure in which a recording medium inlet core 9 and a recording medium outlet core 10 face each other with a gap 14 in between. Recording medium input core 9
is made of a ferromagnetic core 11 such as Mn--Zn ferrite, and a groove 15 is formed so that the core 9 is U-shaped from the recording medium sliding surface side. On the other hand, the exit core 10 is made of a ferromagnetic thin film 5 of, for example, Permalloy or Sendust. The winding is a first winding 16 that is placed around the core 10 on the recording medium output side or around the core near the rear gap, and
A second winding 17 is provided around the core on the gap side with respect to the groove 15 of the recording medium entrance core 9 having a letter-shaped shape.
前記構成よりなる磁気ヘツドの記録時の動作を
説明する。従来のリング形ヘツドもベクトル磁界
を発生しており、その垂直方向成分で垂直磁化膜
に信号を記録することはできるが、その磁界強
度、磁界分布共に、垂直方向に記録するには不充
分な為に記録特性が劣つている。 The operation of the magnetic head having the above structure during recording will be explained. Conventional ring heads also generate a vector magnetic field, and the perpendicular component of the vector magnetic field can record signals on a perpendicularly magnetized film, but both the magnetic field strength and magnetic field distribution are insufficient for recording in the perpendicular direction. Therefore, the recording characteristics are inferior.
これに対して第２図に示す本実施例の磁気ヘツ
ドにおいては、出側コア１０を強磁性薄膜で構成
することにより磁束が上記薄膜部５に集中し、垂
直磁化膜４の残留磁化を決定づける記録媒体出側
の垂直成分の磁界分布が急俊になる。さらに第１
の巻線１６及び第２の巻線１７にギヤツプ面１４
に面している記録媒体入側及び出側コアのギヤツ
プ面に生じる磁化が同極性になるように信号電流
を流すことにより、記録時の磁束の流れは第２図
の破線のようになり、第１の巻線１６で発生させ
た磁束をより有効に垂直磁化膜４に作用させるこ
とができる。 On the other hand, in the magnetic head of this embodiment shown in FIG. 2, the output core 10 is made of a ferromagnetic thin film, so that the magnetic flux is concentrated in the thin film portion 5, which determines the residual magnetization of the perpendicularly magnetized film 4. The magnetic field distribution of the vertical component on the exit side of the recording medium becomes sharp. Furthermore, the first
The gap surface 14 is attached to the winding 16 and the second winding 17.
By passing a signal current so that the magnetization generated on the gap surfaces of the recording medium entrance and exit cores facing the same polarity becomes the same, the flow of magnetic flux during recording becomes as shown by the broken line in Figure 2. The magnetic flux generated by the first winding 16 can be made to act on the perpendicularly magnetized film 4 more effectively.
なお記録媒体入側コアの記録媒体摺動面１２，
１２′は記録媒体出側の強磁性薄膜５の摺動面の
面積に比べて十分に広い為に垂直磁化膜４にはほ
とんど作用しない。信号発生時には上記ヘツドは
ギヤツプ１４を有するリング形ヘツドとして動作
し、高能率再生が行なえる。 Note that the recording medium sliding surface 12 of the recording medium entrance core,
Since the area 12' is sufficiently wide compared to the area of the sliding surface of the ferromagnetic thin film 5 on the recording medium exit side, it hardly acts on the perpendicular magnetization film 4. When a signal is generated, the head operates as a ring-shaped head with a gap 14, allowing highly efficient reproduction.
また、第３図の本発明の他の実施例に示すよう
に出側コア１０に例えばZnフエライト等からな
る非極性の補強部１３を配置しても前記動作原理
は全く同じであり、ヘツド製造のしやすさ、ヘツ
ドタツチ、摩耗等のヘツド記録媒体間インターフ
エイスにおいてより望ましい結果が得られる。 Further, as shown in another embodiment of the present invention in FIG. 3, even if a non-polar reinforcing portion 13 made of, for example, Zn ferrite is disposed on the exit core 10, the operating principle is exactly the same, and the head manufacturing More desirable results can be obtained in the head-to-recording-medium interface, such as ease of handling, head touch, and wear.
また溝１５についても非磁性材料で少くとも摺
動面近傍を充填することにより同様の効果が得ら
れる。 Further, the same effect can be obtained by filling the groove 15 with a non-magnetic material at least near the sliding surface.
第４図は本発明の磁気ヘツドのさらに他の実施
例を示すもので、記録媒体出側コア１０におい
て、前記強磁性薄膜５の記録媒体出側に、少くと
も記録媒体摺動面近傍が例えばZnフエライト等
の非磁性材料からなり残る後部コアをMn−Znフ
エライト等の強磁性材料１１で構成したコアを配
置したものである。 FIG. 4 shows still another embodiment of the magnetic head of the present invention, in which in the recording medium exit core 10, at least the vicinity of the recording medium sliding surface of the ferromagnetic thin film 5 is located on the recording medium exit side, for example. The remaining rear core made of a non-magnetic material such as Zn ferrite is replaced with a core made of a ferromagnetic material 11 such as Mn--Zn ferrite.
この構成によれば、前述したようにヘツド製造
のしやすさ、ヘツド−記録媒体間のインターフエ
イスが良好になると同時に、記録時においては強
磁性薄膜５の飽和を押さえてより高率的な記録が
でき、再生時においてはコア能率を向上させ高性
能な記録再生特性が得られる。 According to this configuration, as described above, it is easy to manufacture the head and the interface between the head and the recording medium is improved, and at the same time, during recording, saturation of the ferromagnetic thin film 5 is suppressed to achieve higher recording efficiency. During playback, core efficiency is improved and high-performance recording and playback characteristics are obtained.
以上実施例をもとに説明したように本発明の磁
気ヘツドは垂直記録媒体をはさむ必要がなく、し
かも垂直記録として高能率な記録及び再生ができ
ることから、広範囲の高密度記録分野への応用が
可能である。 As explained above based on the embodiments, the magnetic head of the present invention does not need to sandwich a perpendicular recording medium and can perform highly efficient recording and reproduction as perpendicular recording, so it can be applied to a wide range of high-density recording fields. It is possible.
第１図は従来の垂直磁気記録方式磁気ヘツドの
構成を示す図、第２図は本発明の実施例における
磁気ヘツドを示す図、第３図は本発明の他の実施
例における磁気ヘツドを示す図、第４図は本発明
のさらに他の実施例における磁気ヘツドを示す図
である。
１……磁気記録媒体、９……記録媒体入側コ
ア、１０……記録媒体出側コア、１１……強磁性
体コア、１２，１２′……磁気媒体摺動面、１４
……ギヤツプ、１５……溝、１６……第１の巻
線、１７……第２の巻線。
FIG. 1 is a diagram showing the configuration of a conventional perpendicular magnetic recording type magnetic head, FIG. 2 is a diagram showing a magnetic head in an embodiment of the present invention, and FIG. 3 is a diagram showing a magnetic head in another embodiment of the present invention. 4 are diagrams showing a magnetic head in still another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Magnetic recording medium, 9...Recording medium inlet core, 10...Recording medium outlet core, 11...Ferromagnetic core, 12, 12'...Magnetic medium sliding surface, 14
...Gap, 15...Groove, 16...First winding, 17...Second winding.
Claims (1)
と、強磁性薄膜コアからなる記録媒体出側コアと
で磁気ギヤツプを構成したリング形磁気ヘツドに
おいて、前記記録媒体入側コアがＵ字形になるよ
うに記録媒体摺動面側から溝を形成し、前記記録
媒体出側コアあるいは該記録媒体出側コアに当接
している記録媒体入側コアの部分に第１の巻線を
施すとともに、前記記録媒体入側コアのＵ字形の
前記磁気ギヤツプ側脚部分に第２の巻線を施した
ことを特徴とする磁気ヘツド。 ２ 強磁性薄膜コアの記録媒体出側において、少
くとも記録媒体摺動面近傍を非磁性材料で構成
し、残る後部コアを強磁性材料で構成したコアを
配置したことを特徴とする特許請求の範囲第１項
記載の磁気ヘツド。[Scope of Claims] 1. A ring-shaped magnetic head in which a magnetic gap is formed by a recording medium inlet core made of a ferromagnetic bulk material and a recording medium outlet core made of a ferromagnetic thin film core, wherein the recording medium inlet core A groove is formed from the recording medium sliding surface side so that the groove is U-shaped, and a first winding is formed in the recording medium outlet core or in a portion of the recording medium inlet core that is in contact with the recording medium outlet core. A magnetic head characterized in that a second winding is provided on the U-shaped magnetic gap side leg portion of the recording medium entrance core. 2. On the recording medium exit side of the ferromagnetic thin film core, at least the vicinity of the recording medium sliding surface is made of a non-magnetic material, and the remaining rear core is made of a ferromagnetic material. A magnetic head according to scope 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9584981A JPS57210414A (en) | 1981-06-19 | 1981-06-19 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9584981A JPS57210414A (en) | 1981-06-19 | 1981-06-19 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57210414A JPS57210414A (en) | 1982-12-24 |
| JPH0152806B2 true JPH0152806B2 (en) | 1989-11-10 |
Family
ID=14148815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9584981A Granted JPS57210414A (en) | 1981-06-19 | 1981-06-19 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57210414A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2535097B1 (en) * | 1982-10-22 | 1989-04-07 | Cii Honeywell Bull | DEVICE FOR WRITING INFORMATION ON A MAGNETIC MEDIUM |
| US4748525A (en) * | 1986-02-14 | 1988-05-31 | Magnetic Peripherals Inc. | Probe head for vertical recording |
-
1981
- 1981-06-19 JP JP9584981A patent/JPS57210414A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57210414A (en) | 1982-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4639810A (en) | Magnetic head for perpendicular magnetization | |
| US3984874A (en) | High density magnetic recording and reproducing system | |
| JPH0152806B2 (en) | ||
| JPH0327963B2 (en) | ||
| JPH048844B2 (en) | ||
| JPH0229904A (en) | Perpendicular magnetic recording head | |
| JPS5888812A (en) | Magnetic head | |
| JPS58150120A (en) | Vertical magnetic recording head | |
| JPH034966Y2 (en) | ||
| JPH01165010A (en) | Composite type magnetic head | |
| JPS61222006A (en) | Magnetic head for vertical recording | |
| JPS5832214A (en) | Magnetic head | |
| JP2847895B2 (en) | Magnetic head | |
| JPH02762B2 (en) | ||
| JPS5860419A (en) | Magnetic head | |
| JPH0827902B2 (en) | Magnetic head | |
| JPS6334523B2 (en) | ||
| JPS6050609A (en) | Magnetic head | |
| JPH0581963B2 (en) | ||
| Krey et al. | Principles and head characteristics in VHF recording | |
| JPH0644522A (en) | Magnetic head | |
| JPH0320803B2 (en) | ||
| JPS6257110A (en) | Magnetic head and magnetic recording method | |
| JPS58128019A (en) | Video head for tape with high corecive force | |
| JPH02198011A (en) | Magnetic head |