JPH03224113A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPH03224113A
JPH03224113A JP1778690A JP1778690A JPH03224113A JP H03224113 A JPH03224113 A JP H03224113A JP 1778690 A JP1778690 A JP 1778690A JP 1778690 A JP1778690 A JP 1778690A JP H03224113 A JPH03224113 A JP H03224113A
Authority
JP
Japan
Prior art keywords
electrodes
magnetic head
main body
magnetization
induced
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
Application number
JP1778690A
Other languages
Japanese (ja)
Inventor
Toshio Inao
俊雄 稲生
Akio Kondo
近藤　昭夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tosoh Corp
Original Assignee
Tosoh Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tosoh Corp filed Critical Tosoh Corp
Priority to JP1778690A priority Critical patent/JPH03224113A/en
Publication of JPH03224113A publication Critical patent/JPH03224113A/en
Pending legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

PURPOSE:To obtain the magnetic head which has a simple construction, can be easily produced and has excellent productivity by pinching a part of a body with electrodes and constituting the part of the body pinched by the electrodes of boracite or Cr2O3. CONSTITUTION:A part of the body 1 is pinched by the electrodes 2 and the part A of the body pinched by the electrodes 2 is constituted of the boracite or Cr2O3. The recording on a medium is executed by impressing an AC voltage from lead wires 3 to the electrodes 2. An AC electric field is generated in the part A of the body 1 by the impression of this voltage. Since the part A is constituted of a material exhibiting an ME effect, AC magnetization is induced in the direction perpendicular to the AC electric field by the ME effect in the part A and the magnetization is induced in the body 1 by the ME effect in this part A. Since there is no need for winding a coil on the body, the production thereof is easily executed.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明はＶＴＲやビデオ、フロッピーディスクあるいは
ハードディスクなど磁気記録媒体の記録再生に用いるこ
とのできる磁気ヘッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic head that can be used for recording and reproducing magnetic recording media such as VTRs, videos, floppy disks, and hard disks.

（従来の技術） 一般的に磁気ヘッドは、第２図に示すように、フェライ
トなどの軟磁性体からなり、ギャップ部分Ｂを含むヘッ
ド本体５にコイル４を巻いた構造を有しており、コイル
４に電流を流すことにより、ヘッド本体５に磁化を誘起
させ、該磁化の誘起によりギャップ部分Ｂにもれ磁場を
発生させ、このもれ磁場を利用することにより媒体への
記録が行なわれる。また再生は、媒体に記録された磁気
的な信号をギャップ部分Ｂから取り込み、このことによ
りコイル４に再生電圧を誘起させ、この再生電圧を検知
することにより行なわれる。しかしながら、近年媒体の
記録密度の向上に伴ない、−小型化した磁気ヘッドが要
望されており、第２図に示すような磁気ヘッドは、ヘッ
ド本体５にコイル４を巻かな・ければならないことから
、加工が難しく、このことから上記磁気ヘッドの小型化
に対して対応が困難であるという問題がある。(Prior Art) Generally, a magnetic head is made of a soft magnetic material such as ferrite and has a structure in which a coil 4 is wound around a head body 5 including a gap portion B, as shown in FIG. By passing a current through the coil 4, magnetization is induced in the head body 5, and the induced magnetization generates a leakage magnetic field in the gap portion B, and recording on the medium is performed by using this leakage magnetic field. . Further, reproduction is performed by taking in a magnetic signal recorded on the medium from the gap portion B, thereby inducing a reproduction voltage in the coil 4, and detecting this reproduction voltage. However, as the recording density of media has improved in recent years, there has been a demand for smaller magnetic heads, and the magnetic head shown in FIG. 2 requires a coil 4 to be wound around the head body 5. Therefore, it is difficult to process, which makes it difficult to respond to miniaturization of the magnetic head.

（発明が解決しようとする課題） 本発明の目的は簡単な構造を有し、その作製が容易で、
生産性向上を図ることのできる磁気ヘッドを提供するこ
とにある。(Problems to be Solved by the Invention) The purpose of the present invention is to have a simple structure, easy to manufacture,
An object of the present invention is to provide a magnetic head that can improve productivity.

（課題を解決するための手段） 本発明者らは上記課題を解決するために鋭意検討を行な
った結果、電気磁気効果を利用することにより、簡単な
構造を有する磁気ヘッドが得られることを見出たし、本
発明を解決するに至った。(Means for Solving the Problems) As a result of intensive studies to solve the above problems, the present inventors found that a magnetic head with a simple structure can be obtained by utilizing electromagnetic effects. The present invention has been solved.

すなわち本発明は、本体の一部を電極で挟み、少なくと
も上記電極により挟まれた本体の部分をボラサイト又は
Ｃｒ２Ｏ３により構成したことを特徴とする磁気ヘッド
である。That is, the present invention is a magnetic head characterized in that a part of the main body is sandwiched between electrodes, and at least the part of the main body sandwiched between the electrodes is made of boracite or Cr2O3.

（作用） 第１図に本発明の磁気ヘッドの構造の一例を示す。第１
図中、１は磁気ヘッドの本体、２は電極、３は入出力信
号を伝達するリード線を示す。本発明の磁気ヘッドは本
体１の一部が電極２により挟まれており、少なくとも上
記電極２により挾まれた本体の部分Ａをボラサイト又は
Ｃｒ２Ｏ３により構成したところに特徴がある。なお、
本発明においてボラサイトとは、 一般式　　　Ｍ３Ｂ７０□３Ｘ ただし、ＭはＣｒＳＭｎ、Ｆ　８％　Ｃｏ５Ｎ　ｉのい
ずれかを示し、ＸはＣＩ、Ｂｒ、Ｉのいずれかを示す。(Function) FIG. 1 shows an example of the structure of the magnetic head of the present invention. 1st
In the figure, 1 is the main body of the magnetic head, 2 is an electrode, and 3 is a lead wire for transmitting input/output signals. The magnetic head of the present invention is characterized in that a part of the main body 1 is sandwiched between electrodes 2, and at least a portion A of the main body sandwiched between the electrodes 2 is made of borasite or Cr2O3. In addition,
In the present invention, boracite has the general formula M3B70□3X, where M represents either CrSMn or F8%Co5Ni, and X represents either CI, Br, or I.

で表される物質である。また、本発明の磁気ヘッドにお
ける電極２は電気伝導性を示すものであればどのような
ものでも用いることができるが、例えばアルミニウムな
どが好ましく用いられる。更に、本体は少なくともＡの
部分がボラサイト又はＣｒ２Ｏ３で構成されていればよ
く、本体のＡの部分以外については磁性を示すものであ
れば特にその構成材料は限定されない。このような材料
としては例えば本体１のＡの部分を構成した材料やフェ
ライトなどを挙げることができる。It is a substance represented by Moreover, the electrode 2 in the magnetic head of the present invention can be made of any material as long as it exhibits electrical conductivity, and for example, aluminum is preferably used. Furthermore, the main body may be made of borasite or Cr2O3 at least in the part A, and there is no particular limitation on the constituent materials of the main body other than the part A as long as it exhibits magnetism. Examples of such materials include the material forming part A of the main body 1, ferrite, and the like.

ところで、本発明の磁気ヘッドにおいて、本体のＡの部
分を構成するボラサイト又はＣｒ２Ｏ３は電気磁気効果
（以下、ＭＥ効果という）を示す物質であって、該効果
によって本発明の磁気ヘッドは作用する。なお、上記Ｍ
Ｅ効果を示す物質とは、電場を与えた場合に磁化が誘起
されたり、磁場を与えた場合に電気分極が誘起される物
質である。By the way, in the magnetic head of the present invention, borasite or Cr2O3 constituting the part A of the main body is a substance that exhibits an electromagnetic effect (hereinafter referred to as ME effect), and the magnetic head of the present invention operates due to this effect. . In addition, the above M
A substance exhibiting the E effect is a substance in which magnetization is induced when an electric field is applied, or electric polarization is induced when a magnetic field is applied.

本発明の磁気ヘッドは、上述のように簡単な構造を有し
、従来の磁気ヘッドのようにコイルを本体に巻く必要が
なくなることから、その作製は容易に行なわれる。The magnetic head of the present invention has a simple structure as described above, and since there is no need to wind a coil around the main body as in conventional magnetic heads, it is easy to manufacture.

以下、本発明の磁気ヘッドを用いた媒体への記録及び媒
体からの記録の読み出しについて説明する。媒体への記
録は、リード線３から電極２に交流電圧を印加すること
により行なわれる。この電圧の印加により、本体１のＡ
の部分には交流電場が発生する。Ａの部分はＭＥ効果を
示す物質から構成されているため、Ａの部分ではＭＥ効
果によって上記交流電場に対して直角方向に交流磁化が
誘起され、このＡの部分の磁化の誘起により本体１中で
は第３図に示すとおり磁化６が誘起される。Hereinafter, recording on a medium and reading recording from the medium using the magnetic head of the present invention will be explained. Recording on the medium is performed by applying an alternating voltage to the electrode 2 from the lead wire 3. By applying this voltage, the A of the main body 1 is
An alternating current electric field is generated in the part. Since the part A is made of a substance that exhibits the ME effect, AC magnetization is induced in the part A in a direction perpendicular to the AC electric field due to the ME effect, and this induction of magnetization in the part A causes the inside of the body 1 to Then, magnetization 6 is induced as shown in FIG.

また、上記本体１中で誘起された磁化６は、第３図に示
すように本体１のギャップの部分Ｂにもれ磁場７を与え
るので、このもれ磁場７を利用することにより媒体への
記録が可能となる。Furthermore, the magnetization 6 induced in the main body 1 gives a leakage magnetic field 7 to the gap portion B of the main body 1 as shown in FIG. Recording becomes possible.

一方、再生は次のとおり行なわれる。はじめにギャップ
部分Ｂから媒体のもれ磁束を取り込む。On the other hand, playback is performed as follows. First, the leakage magnetic flux of the medium is taken in from the gap portion B.

このことにより、本体１内には磁化が生じ、該磁化は本
体のＡの部分まで誘導される。本発明の磁気ヘッドのＡ
の部分はＭＥ効果を示す物質から構成されているため、
誘導された磁化からＭＥ効果によってＡの部分に電気分
極Ｐが発生する。ここで、電極２での面電荷密度をσと
した場合、電気分極Ｐは、 Ｐ　−σ と表される。更に、電極２の面積をＳ、電極２に誘起さ
れる全電荷量をＱ１容量をＣとしたとき、これらと電極
間の電位差Ｖとは、 Ｑ−σ　Ｓ 　Ｐ　Ｓ ＣＶ の関係となり、このことから電極間にはＶ−８Ｐ／Ｃ の電位差が生じる。従って、誘起された電気分極Ｐは電
極間の電位差Ｖとして、リード線３を通して検出され、
この検出によって媒体から出力信号を読み出し、再生す
ることが可能となる。This causes magnetization within the main body 1, and the magnetization is guided to the portion A of the main body. A of the magnetic head of the present invention
Since the part is composed of a substance that exhibits the ME effect,
Electric polarization P is generated in the portion A due to the ME effect from the induced magnetization. Here, when the surface charge density at the electrode 2 is σ, the electric polarization P is expressed as P −σ. Furthermore, when the area of the electrode 2 is S, the total amount of charge induced in the electrode 2 is Q1, and the capacitance is C, the relationship between these and the potential difference V between the electrodes is Q-σ S P S CV , and this A potential difference of V-8P/C occurs between the electrodes. Therefore, the induced electric polarization P is detected as a potential difference V between the electrodes through the lead wire 3,
This detection makes it possible to read and reproduce the output signal from the medium.

（発明の効果） 以上述べたとおり、本発明の磁気ヘッドは構造が簡単で
あるため、その加工は容易となる。このことから本発明
の磁気ヘッドは、近年の磁気ヘッドの小型化に対応し得
るものとなる。(Effects of the Invention) As described above, since the magnetic head of the present invention has a simple structure, its processing is easy. For this reason, the magnetic head of the present invention can respond to the miniaturization of magnetic heads in recent years.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の磁気ヘッドの構造の一例を示す図であ
る。 第２図は従来の磁気ヘッドの構造を示す図である。 第３図は本発明の磁気ヘッドにおいて、誘起される磁化
の方向を示す図である。 図中、 １．５・・・本体　　　　　２・・・電極３・・・リー
ドｌ　　　　　　４　・・・コイル６・・・磁化　　　
　　　　７・・・もれ磁場Ａ・・・電極により挾まれた
本体の部分Ｂ・・・本体のギャップ部分 を各々示す。FIG. 1 is a diagram showing an example of the structure of the magnetic head of the present invention. FIG. 2 is a diagram showing the structure of a conventional magnetic head. FIG. 3 is a diagram showing the direction of magnetization induced in the magnetic head of the present invention. In the figure, 1.5...Body 2...Electrode 3...Lead l 4...Coil 6...Magnetization
7... Leakage magnetic field A... Portion of the main body sandwiched by electrodes B... Gap portion of the main body is shown.

Claims (2)

【特許請求の範囲】[Claims] （１）本体の一部を電極で挟み、少なくとも上記電極に
より挟まれた本体の部分をボラサイトにより構成したこ
とを特徴とする磁気ヘッド。(1) A magnetic head characterized in that a part of the main body is sandwiched between electrodes, and at least the part of the main body sandwiched between the electrodes is made of boracite. （２）本体の一部を電極で挟み、少なくとも上記電極に
より挟まれた本体の部分をＣｒ＿２Ｏ＿３により構成し
たことを特徴とする磁気ヘッド。(2) A magnetic head characterized in that a part of the main body is sandwiched between electrodes, and at least the part of the main body sandwiched between the electrodes is made of Cr_2O_3.
JP1778690A 1990-01-30 1990-01-30 Magnetic head Pending JPH03224113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1778690A JPH03224113A (en) 1990-01-30 1990-01-30 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1778690A JPH03224113A (en) 1990-01-30 1990-01-30 Magnetic head

Publications (1)

Publication Number Publication Date
JPH03224113A true JPH03224113A (en) 1991-10-03

Family

ID=11953400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1778690A Pending JPH03224113A (en) 1990-01-30 1990-01-30 Magnetic head

Country Status (1)

Country Link
JP (1) JPH03224113A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000014732A3 (en) * 1998-09-09 2000-04-20 Forschungszentrum Juelich Gmbh Electric field for magnetic reversal of a thin film
JP2005156390A (en) * 2003-11-27 2005-06-16 National Institute Of Advanced Industrial & Technology Magnetic sensor device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000014732A3 (en) * 1998-09-09 2000-04-20 Forschungszentrum Juelich Gmbh Electric field for magnetic reversal of a thin film
JP2005156390A (en) * 2003-11-27 2005-06-16 National Institute Of Advanced Industrial & Technology Magnetic sensor device

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