JPH01307906A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPH01307906A JPH01307906A JP63138788A JP13878888A JPH01307906A JP H01307906 A JPH01307906 A JP H01307906A JP 63138788 A JP63138788 A JP 63138788A JP 13878888 A JP13878888 A JP 13878888A JP H01307906 A JPH01307906 A JP H01307906A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording
- working gap
- films
- core
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 107
- 239000000463 material Substances 0.000 claims abstract description 29
- 230000035699 permeability Effects 0.000 claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 abstract description 17
- 239000000956 alloy Substances 0.000 abstract description 17
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 13
- 230000004907 flux Effects 0.000 abstract description 10
- 239000002889 diamagnetic material Substances 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000005292 diamagnetic effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002887 superconductor Substances 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
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
-
- 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
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/11—Shielding of head against electric or magnetic fields
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、高密度磁気記録用の磁気ヘッドに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic head for high-density magnetic recording.
従来の技術 最近、磁気記録の高密度化が要望されている。Conventional technology Recently, there has been a demand for higher density magnetic recording.
この磁気記録の高密度化を図るには、磁気記録媒体の抗
磁力を向上させる必要があシ、このため、金属粉を用い
た磁気記録媒体、あるいは金属薄膜を用いた磁気記録媒
体が開発されている。これらの高抗磁力を有する磁気記
録媒体に用いる磁気ヘッドとしては、従来のフェライト
コア単体からなる構造では、十分な記録を行なうには飽
和磁束密度が足シないため、トラック部に飽和磁束密度
の高い合金膜を有する構造が開発されている。以下、こ
の従来例の磁気ヘッドについて第５図を参照しながら説
明する。In order to increase the density of magnetic recording, it is necessary to improve the coercive force of the magnetic recording medium, and for this reason, magnetic recording media using metal powder or magnetic recording media using thin metal films have been developed. ing. For magnetic heads used in these magnetic recording media with high coercive force, the conventional structure consisting of a single ferrite core does not have enough saturation magnetic flux density to perform sufficient recording, so it is necessary to Structures with high alloy films have been developed. This conventional magnetic head will be explained below with reference to FIG.
第５図に示すようにコア５１はその本体部５２．５３が
フェライトにより形成され、本体部５２．５３における
磁気記録媒体対向面５４、すなわち、記録再生トラック
側に作動ギャップ形成用のセンダスト、アモルファス等
の高透磁率合金磁性体膜５５．５６が対峙して設けられ
、これら高透磁率合金磁性体膜５５、５６の間にガラス
が充填されて作動ギャップ５７が形成されて〜する。高
透磁率合金磁性体膜５５．５６の飽和磁束密度は、フェ
ライトからなる本体部５２゜５３に比較して１．５〜２
倍以上大きく、抗磁力の高い磁気記録媒体への十分な高
密度記録を可能にしている。As shown in FIG. 5, the core 51 has a main body 52.53 made of ferrite, and a magnetic recording medium facing surface 54 of the main body 52, 53, that is, the recording/reproducing track side, is made of sendust or amorphous for forming an operating gap. High permeability alloy magnetic films 55 and 56 are provided facing each other, and glass is filled between these high permeability alloy magnetic films 55 and 56 to form an operating gap 57. The saturation magnetic flux density of the high permeability alloy magnetic films 55 and 56 is 1.5 to 2 compared to the main body 52 and 53 made of ferrite.
It is more than twice as large and enables sufficiently high-density recording on magnetic recording media with high coercive force.
発明が解決しようとする課題
上記従来の磁気ヘッドの磁気記録媒体対向面５４におい
て最も望ましいことは、記録磁界が高透磁率合金磁性体
膜５５．５６の端部よシ発生し、作動ギャップ５７の近
傍に磁束が集中することである。しかし、上記従来例の
構成では、フェライトからなる本体部５２．５３からの
漏れ磁界が発生するため、作動ギャップ５７の近傍での
磁束集中が困難であり、磁気ヘッドの記録効率を低下さ
せる要因となっていた。Problems to be Solved by the Invention The most desirable thing about the magnetic recording medium facing surface 54 of the conventional magnetic head is that the recording magnetic field is generated from the ends of the high permeability alloy magnetic films 55 and 56 and is generated from the working gap 57. This means that magnetic flux is concentrated in the vicinity. However, in the conventional configuration described above, a leakage magnetic field is generated from the main body portions 52 and 53 made of ferrite, making it difficult to concentrate magnetic flux near the working gap 57, which is a factor that reduces the recording efficiency of the magnetic head. It had become.
本発明は、上記のような従来技術の課題を解決するもの
であり、作動ギャップ近傍に記録磁界を集中させること
ができ、したがって、記録効率を向上させることができ
るようにした磁気ヘッドを提供することを目的とするも
のである。The present invention solves the problems of the prior art as described above, and provides a magnetic head that can concentrate a recording magnetic field near the working gap, thereby improving recording efficiency. The purpose is to
課題を解決するための手段
本発明は、上記目的を達成するために、コアの作動ギャ
ップ形成部の少なくとも一方が高透磁率磁性体膜により
形成され、少なくともとの高透磁率磁性体膜が設けられ
た一方の磁気記録媒体対向面側か超電導材により形成さ
れたものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a method in which at least one of the working gap forming portions of the core is formed of a high magnetic permeability magnetic film, and at least one of the high permeability magnetic films is provided. The other side facing the magnetic recording medium is made of superconducting material.
また、上記コアの両側面が超電導材により被覆されたも
のである。Further, both sides of the core are coated with a superconducting material.
作用 本発明は、上記構成により次のような作用を有する。action The present invention has the following effects due to the above configuration.
すなわち、ギャップ形成部の高透磁率磁性体膜に続いて
磁気記録媒体対向面側に設けた超電導材が完全反磁性体
であるので、この超電導材により、作動ギャップ近傍以
外での漏れ磁界を十分に軽減し、作動ギャップ近傍に記
録磁界を集中させることができる。In other words, since the superconducting material provided on the surface facing the magnetic recording medium following the high permeability magnetic film in the gap forming part is a completely diamagnetic material, this superconducting material sufficiently suppresses the leakage magnetic field outside the vicinity of the operating gap. The recording magnetic field can be concentrated near the working gap.
まだ、コアの側面を超電導材で被覆することにより、側
面からの漏れ磁界をも生じないようにし、作動ギャップ
近傍に記録磁界を更に一層集中させることができる。However, by coating the side surfaces of the core with a superconducting material, leakage magnetic fields from the side surfaces can be prevented, and the recording magnetic field can be further concentrated in the vicinity of the working gap.
実施例
以下、本発明の実施例について図面を参照しながら説明
する。EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.
まず、本発明の第１の実施例について説明する。First, a first embodiment of the present invention will be described.
第１図は本発明の第１の実施例における磁気ヘッドを示
す要部の斜視図である。第１図に示すようにコアｌはそ
の本体部２，３がフェライトと、磁気記録媒体対向面４
側の超電導材５，６により形成されている。コア１は磁
気記録媒体対向面４側の作動ギャップ形成部が磁極であ
る高透磁率合金磁性体膜７，８により形成され、磁気記
録媒体対向面４側は高透磁率合金磁性体膜７，８と超電
導材５，６とが連続して設けられている。高透磁率合金
磁性体膜７，８の間にガラスが充填されて作動ギャップ
９が形成されている。FIG. 1 is a perspective view of essential parts of a magnetic head in a first embodiment of the present invention. As shown in FIG. 1, the core l has main body parts 2 and 3 made of ferrite and a magnetic recording medium facing surface 4.
It is formed of superconducting materials 5 and 6 on the sides. The core 1 is formed of high permeability alloy magnetic films 7 and 8 whose working gap forming portions on the magnetic recording medium facing surface 4 side are magnetic poles, and the high magnetic permeability alloy magnetic films 7 and 8 on the magnetic recording medium facing surface 4 side. 8 and superconducting materials 5 and 6 are continuously provided. Glass is filled between the high permeability alloy magnetic films 7 and 8 to form an operating gap 9.
上記超電導材５，６として、例えば９０にの臨界温得の
材料を用いた場合、超電導状態を得るには、常温より冷
却する必要があり、この冷却には、図示していないが、
電子冷凍素子を用いればよい。For example, when a material with a critical temperature of 90 is used as the superconducting materials 5 and 6, it is necessary to cool it from room temperature to obtain a superconducting state, and this cooling includes, although not shown,
An electronic refrigeration element may be used.
また、超電導材５，６として、化学式Ｍ Ｂａ ＊ Ｃ
ｕ ５ｏｔ−δ（ｏ＜δ＜ｉ）で示され、ＭがＹ、 Ｌ
ａ、 Ｍｄ。In addition, as the superconducting materials 5 and 6, the chemical formula M Ba * C
u 5ot-δ (o<δ<i), M is Y, L
a, Md.
Ｐｍ、 Ｓｍ、 Ｅｕ、 Ｇｄ、 Ｄｙ５ＨｏＳＥｒ、
Ｔｍ５Ｙｂ、 Ｌｕ。Pm, Sm, Eu, Gd, Dy5HoSEr,
Tm5Yb, Lu.
Ｓｃ、 Ｓｒのうち、少なくとも一種類、特にＹであり
、臨界温度が常温、若しくは常温付近である材料な用い
れば、上記冷却手段を必要としない。If at least one of Sc and Sr, especially Y is used, and a material whose critical temperature is at or near room temperature is used, the cooling means described above is not required.
以上のような第１の実施例の構成によれば、コア１にお
ける磁気記録媒体対向面４側はギャップ形成部の高透磁
率合金磁性体膜７，８に連続して完全反磁性体である超
電導体５，６を設けているので、フェライトからなる本
体部２，３からは磁気記録媒体対向面４への漏れ磁界が
生じない。したがって、高透磁率合金磁性体膜７，８の
端部に磁束が十分集中し、作動ギャップ９近傍での記録
磁界の集中を実現することができるので、磁気ヘッドの
記録効率が著しく向上する。According to the configuration of the first embodiment as described above, the surface 4 of the core 1 facing the magnetic recording medium is completely diamagnetic, continuous with the high permeability alloy magnetic films 7 and 8 of the gap forming part. Since the superconductors 5 and 6 are provided, no magnetic field leaks from the main bodies 2 and 3 made of ferrite to the surface 4 facing the magnetic recording medium. Therefore, the magnetic flux is sufficiently concentrated at the ends of the high permeability alloy magnetic films 7 and 8, and the recording magnetic field can be concentrated near the working gap 9, so that the recording efficiency of the magnetic head is significantly improved.
次に本発明の第２の実施例について説明する。Next, a second embodiment of the present invention will be described.
第２図は本発明の第２の実施例における磁気ヘッドを示
す要部の斜視図である。FIG. 2 is a perspective view of essential parts of a magnetic head in a second embodiment of the invention.
第２図に示すように本実施例においては、コア１の一方
の本体部２がフェライトによ多形成され、コア１の他方
の本体部３がフェライトと磁気記録媒体対向面４側の超
電導材６により形成されている。すなわち、作動ギャッ
プ形成部の一方の高透磁率合金磁性体膜８と超電導材６
が連続して形成されたものであり、その他の構成は上記
第１の実施例と同様である。As shown in FIG. 2, in this embodiment, one body part 2 of the core 1 is made of ferrite, and the other body part 3 of the core 1 is made of ferrite and a superconducting material on the side facing the magnetic recording medium 4. 6. That is, one high magnetic permeability alloy magnetic film 8 and the superconducting material 6 of the working gap forming part
are formed continuously, and the other structure is the same as that of the first embodiment.
本実施例においては、超電導材６によりコア１の本体部
２，３のうち、本体部３のフェライトから磁気記録媒体
対向面４へ漏れ磁束が生じないようにすることができ、
上記第１の実施例の磁気ヘッドと比較すると、作動ギャ
ップ９近傍での記録磁界集中に若干力るが、実用上問題
なく、製造コストを低下することができる。In this embodiment, the superconducting material 6 can prevent magnetic flux from leaking from the ferrite of the main body 3 of the main bodies 2 and 3 of the core 1 to the magnetic recording medium facing surface 4.
Compared to the magnetic head of the first embodiment, the concentration of the recording magnetic field near the working gap 9 is slightly increased, but there is no practical problem and the manufacturing cost can be reduced.
次に本発明の第３の実施例について説明する。Next, a third embodiment of the present invention will be described.
第３図は本発明の第３の実施例における磁気ヘッドを示
す要部の斜視図である。FIG. 3 is a perspective view of essential parts of a magnetic head in a third embodiment of the invention.
第３図に示すように本実施例においては、コア１の一方
の本体部２がフェライトにより形成され、コア１の他方
の本体部３がフェライトと磁気記録媒体対向面４側の超
電導材６によ多形成されている。そして、作動ギャップ
形成部は超電導材６を有する本体部３側にのみ高透磁率
合金磁性体膜８が設けられている。すなわち、作動ギャ
ップ形成部の一方にのみ高透磁率合金磁性体膜８が設け
られ、この高透磁率合金磁性体膜８に連続して超電導材
６が形成されたものであシ、その他の構成は上記第１の
実施例と同様である。As shown in FIG. 3, in this embodiment, one body part 2 of the core 1 is formed of ferrite, and the other body part 3 of the core 1 is made of ferrite and a superconducting material 6 on the side of the surface 4 facing the magnetic recording medium. It is multiformed. In the working gap forming portion, a high permeability alloy magnetic film 8 is provided only on the main body portion 3 side having the superconducting material 6. That is, the high magnetic permeability alloy magnetic film 8 is provided only on one side of the working gap forming part, and the superconducting material 6 is formed continuously on this high magnetic permeability alloy magnetic film 8, and other configurations are possible. is the same as in the first embodiment.
本実施例においては、超電導材６によりコア１の本体部
２，３のうち、本体部３のフェライトから磁気記録媒体
対向面４へ漏れ磁束が生じないようにすることができ、
上記第１の実施例の磁気ヘッドと比較すると、作動ギャ
ップ９近傍での記録磁界集中に若干力るが、実用上問題
なく、製造コストを著しく低下させることができる。In this embodiment, the superconducting material 6 can prevent magnetic flux from leaking from the ferrite of the main body 3 of the main bodies 2 and 3 of the core 1 to the magnetic recording medium facing surface 4.
Compared to the magnetic head of the first embodiment, the concentration of the recording magnetic field near the working gap 9 is slightly increased, but there is no practical problem and the manufacturing cost can be significantly reduced.
次に本発明の第４の実施例について説明する。Next, a fourth embodiment of the present invention will be described.
第４図は本発明の第４の実施例における磁気ヘッドを示
す要部の斜視図である。FIG. 4 is a perspective view of essential parts of a magnetic head in a fourth embodiment of the present invention.
第４図に示すように本実施例においては、コア１の両側
面に超電導材１０．１１が被覆状態に接合されたもので
あり、その他の構成は上記第１ないし第３の実施例と同
様である。As shown in FIG. 4, in this embodiment, superconducting materials 10 and 11 are bonded to both sides of the core 1 in a covering state, and the other configurations are the same as in the first to third embodiments. It is.
上記第１ないし第３の実施例では、コア１の側面での漏
れ磁束が若干生ずるおそれがあるが、本実施例において
は、上記のようにコア１０両側面を超電導材１０． １
１で被覆することにより、コア１の側面での漏れ磁束を
も生じさせないようにすることができるので、作動ギャ
ップの近傍に記録磁界を更に一層集中させることができ
る。In the first to third embodiments described above, there is a possibility that some leakage magnetic flux may occur on the side surfaces of the core 1, but in this embodiment, both sides of the core 10 are covered with the superconducting material 10. 1
1, it is possible to prevent leakage magnetic flux from occurring at the side surfaces of the core 1, thereby making it possible to further concentrate the recording magnetic field in the vicinity of the working gap.
発明の効果
以上述べたように本発明によれば、コアの作動ギャップ
形成部の少なくとも一方を高透磁率磁性体膜により形成
し、少なくともこの高透磁率磁性体膜を設けた一方の磁
気記録媒体対向面側を超電導材により形成しているので
、完全反磁性体である上記超電導材により、作動ギャッ
プ近傍以外での漏れ磁界を十分に軽減し、作動ギャップ
近傍に記録磁界を集中させることができる。したがって
、記録効率を向上させることができる。Effects of the Invention As described above, according to the present invention, at least one of the working gap forming portions of the core is formed of a high magnetic permeability magnetic film, and at least one of the magnetic recording media provided with the high permeability magnetic film is provided. Since the opposing surface is made of a superconducting material, the superconducting material, which is completely diamagnetic, can sufficiently reduce the leakage magnetic field outside the vicinity of the working gap, making it possible to concentrate the recording magnetic field in the vicinity of the working gap. . Therefore, recording efficiency can be improved.
また、コアの側面を超電導材で被覆することにより、側
面からの漏れ磁界をも生じないようにし、作動ギャップ
近傍に記録磁界を更に一層集中させて記録効率を向上さ
せることができる。Furthermore, by coating the side surfaces of the core with a superconducting material, leakage magnetic fields from the side surfaces can be prevented, and the recording magnetic field can be further concentrated in the vicinity of the working gap, thereby improving recording efficiency.
第１図ないし第４図はそれぞれ本発明の第１ないし第４
図の実施例における磁気ヘッドを示す要部の斜視図、第
５図は従来の磁気ヘッドを示す要部の斜視図である。
１・・コア、２，３・・・本体部、４・・・磁気記録媒
体対向面、５，６・・・超電導材、７，８・・・高透磁
率合金磁性体膜、９・・・作動ギャップ、１０．１１・
・・超電導材。
代理人の氏名 弁理士 中 尾 敏 男ほか１名第１図
第３図FIGS. 1 to 4 show the first to fourth embodiments of the present invention, respectively.
FIG. 5 is a perspective view of the main parts of the magnetic head in the embodiment shown in the figure, and FIG. 5 is a perspective view of the main parts of the conventional magnetic head. DESCRIPTION OF SYMBOLS 1... Core, 2, 3... Main body part, 4... Magnetic recording medium opposing surface, 5, 6... Superconducting material, 7, 8... High magnetic permeability alloy magnetic film, 9...・Operating gap, 10.11・
...Superconducting material. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1 Figure 3
Claims (2)
透磁率磁性体膜により形成され、少なくともこの高透磁
率磁性体膜が設けられた一方の磁気記録媒体対向面側が
超電導材により形成されていることを特徴とする磁気ヘ
ッド。(1) At least one of the working gap forming portions of the core is formed of a high magnetic permeability magnetic film, and at least one surface facing the magnetic recording medium on which the high permeability magnetic film is provided is formed of a superconducting material. A magnetic head characterized by:
求項１記載の磁気ヘッド。(2) The magnetic head according to claim 1, wherein both sides of the core are coated with a superconducting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63138788A JPH01307906A (en) | 1988-06-06 | 1988-06-06 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63138788A JPH01307906A (en) | 1988-06-06 | 1988-06-06 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01307906A true JPH01307906A (en) | 1989-12-12 |
Family
ID=15230226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63138788A Pending JPH01307906A (en) | 1988-06-06 | 1988-06-06 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01307906A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7538977B2 (en) * | 2004-04-30 | 2009-05-26 | Hitachi Global Storage Technologies B.V. | Method and apparatus for providing diamagnetic flux focusing in a storage device |
| US7751146B2 (en) * | 2004-02-19 | 2010-07-06 | Headway Technologies, Inc. | Abs through aggressive stitching |
-
1988
- 1988-06-06 JP JP63138788A patent/JPH01307906A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7751146B2 (en) * | 2004-02-19 | 2010-07-06 | Headway Technologies, Inc. | Abs through aggressive stitching |
| US7538977B2 (en) * | 2004-04-30 | 2009-05-26 | Hitachi Global Storage Technologies B.V. | Method and apparatus for providing diamagnetic flux focusing in a storage device |
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