JPS59121616A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS59121616A JPS59121616A JP22875482A JP22875482A JPS59121616A JP S59121616 A JPS59121616 A JP S59121616A JP 22875482 A JP22875482 A JP 22875482A JP 22875482 A JP22875482 A JP 22875482A JP S59121616 A JPS59121616 A JP S59121616A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- sheet
- conductor
- wire
- current
- 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
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
（ａ）発明の技術分野
本発明はバイアス磁界を印加する導電体部が設げられた
磁気抵抗効果素子を用いた磁気ヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a magnetic head using a magnetoresistive element provided with a conductor portion for applying a bias magnetic field.
（ｂ）従来技術と問題点
強磁性体に磁界を印加したときの電気的抵抗値の変化を
検出する磁気抵抗効果素子を用いた磁気ヘットは第１図
に示すように構成されている。第１図は従来の磁気ヘッ
ドの構成を示す斜視図である。(b) Prior Art and Problems A magnetic head using a magnetoresistive element that detects changes in electrical resistance when a magnetic field is applied to a ferromagnetic material is constructed as shown in FIG. FIG. 1 is a perspective view showing the configuration of a conventional magnetic head.
（ａ）に示すように記録媒体１に矢印Ｘ方向に磁化容易
軸を有する強磁性薄板よりなる磁気抵抗効果素子２を垂
直Ｙ方向に当接又は近接させ、磁気抵抗効果素子２の長
手方向の両端に電極２Ａ。As shown in (a), a magnetoresistive element 2 made of a ferromagnetic thin plate having an axis of easy magnetization in the direction of the arrow X is brought into contact with or close to the recording medium 1 in the vertical Y direction, and 2A electrodes on both ends.
２Ｂを配置し、電極２Ａ、２Ｂ間に定電流のセンス電流
１１を流す。一方、磁気抵抗効果素子２と平行に配置し
た導電体３にバイアス電流１２を流すことで磁気抵抗効
果素子２には矢印Ｙ方向の磁界が励磁される。したがっ
て、磁気抵抗効果素子２は自身の矢印Ｘ方向の磁化容易
軸と、矢印Ｙ方向の励磁された磁界との合成により矢印
Ｆ方向の磁化が形成されている。この矢印Ｆ方向の磁化
は記録媒体の矢印ＨｙＸ方向信号磁界によって変化され
、電極２Ａ、２Ｂ間に発生する抵抗値の変化を検出する
ことで記録媒体１に記録された信号が再生される。この
再生信号を効果的に得るためには矢印Ｆ方向の磁化は記
録媒体１に対して４０〜５０°５の角度に設定するよう
に配慮されている。2B, and a constant sense current 11 is passed between the electrodes 2A and 2B. On the other hand, by passing a bias current 12 through a conductor 3 arranged parallel to the magnetoresistive element 2, a magnetic field in the direction of arrow Y is excited in the magnetoresistive element 2. Therefore, the magnetoresistive element 2 is magnetized in the direction of arrow F by combining its own axis of easy magnetization in the direction of arrow X and the excited magnetic field in the direction of arrow Y. The magnetization in the direction of the arrow F is changed by the signal magnetic field of the recording medium in the direction of the arrow HyX, and the signal recorded on the recording medium 1 is reproduced by detecting the change in resistance value occurring between the electrodes 2A and 2B. In order to effectively obtain this reproduced signal, consideration is given to setting the magnetization in the direction of arrow F at an angle of 40 to 50 degrees with respect to the recording medium 1.
このように磁化を最適状態に設定するためには磁気抵抗
効果素子２が一軸異方性を有することが必要であり、そ
のため、磁気抵抗効果素子形成時あるいは形成後磁化容
易軸配向を行っている。この場合、磁気抵抗効果素子２
の形状異方性が大きな要因となり、形状異方性に合致し
ない方向に磁化容易軸の配向を必要とする場合、あるい
は磁気抵抗効果素子２の配置上（ｂ）に示すように縦Ｉ
］と横８１との比が大であれば良いが横８２のように形
状異方性がきわめて小となる場合は配向により必要な方
向に磁化容易軸を形成することは困難となる問題を有し
ていた。In order to set the magnetization to the optimum state in this way, it is necessary for the magnetoresistive element 2 to have uniaxial anisotropy, and therefore the easy axis orientation of magnetization is performed during or after formation of the magnetoresistive element. . In this case, the magnetoresistive element 2
When the shape anisotropy of the magneto-resistance effect element 2 becomes a major factor and the axis of easy magnetization needs to be oriented in a direction that does not match the shape anisotropy, or due to the arrangement of the magnetoresistive element 2, the vertical I
] and the horizontal 81 is good, but when the shape anisotropy is extremely small like the horizontal 82, there is a problem that it is difficult to form an axis of easy magnetization in the required direction due to orientation. Was.
特に、薄膜プロセスによって形成する場合では形状異方
性を有していない時または異方性に合致しない時は強制
的に配向を行−３でも、その製造工程における加熱など
によって配向ばくすれ、所望の磁化容易軸の方向が得ら
れない欠点を有していた。In particular, when forming a thin film using a thin film process, if the shape does not have anisotropy or does not match the anisotropy, even if the orientation is forcibly performed -3, the orientation may be destroyed by heating etc. in the manufacturing process, resulting in the desired orientation. It had the disadvantage that the direction of the axis of easy magnetization could not be obtained.
（Ｃ）発明の目的
本発明の目的は記録媒体に対して水平方向の磁界および
垂直方向の磁界はそれぞれ磁気抵抗効果素子の近傍に設
けられた導電体のバイアス磁界によって印加されるよう
にして前述の問題点を除去したものを提供するものであ
る。(C) Object of the Invention The object of the present invention is to apply the magnetic field in the horizontal direction and the magnetic field in the vertical direction to the recording medium by a bias magnetic field of a conductor provided near the magnetoresistive element. It is intended to provide a solution that eliminates the problems of .
（ｃｌ）発明の構成
本発明の目的は１強磁性部祠と、媒体に対向される所定
箇所には所定方向の第１のバイアス磁界を印加せしめる
該強磁性部材と平行に配設された第１の導電体部と、該
第１のバイアス磁界に直交する方向の第２のバイアス磁
界を印加せしめる該強磁性部材を捲回するように配設さ
れた第２の導電体部とによって形成されたことを特徴と
する磁気抵抗効果型磁気ヘッドにより達成される。(cl) Structure of the Invention The object of the present invention is to include a ferromagnetic member and a ferromagnetic member arranged parallel to the ferromagnetic member to apply a first bias magnetic field in a predetermined direction to a predetermined location facing the medium. a second conductive member disposed so as to wrap around the ferromagnetic member that applies a second bias magnetic field in a direction perpendicular to the first bias magnetic field; This is achieved by a magnetoresistive magnetic head characterized by the following.
（ｅ）発明の実施例 以下本発明を第２図を参考に詳細に説明する。(e) Examples of the invention The present invention will be explained in detail below with reference to FIG.
第２図は本発明による磁気へノＦの一実施例を示す（ａ
）は斜視図、 （ｂ）は説明図である。FIG. 2 shows an embodiment of the magnetic field F according to the present invention (a
) is a perspective view, and (b) is an explanatory view.
微小空隙１２を有するＣ字状の強磁性薄板１１ば記録媒
体１との対向部１１Ａの両端にセンス電流供給用のリー
ド線１５．１６が接続されている。Lead wires 15 and 16 for supplying a sense current are connected to both ends of a portion 11A of the C-shaped ferromagnetic thin plate 11 having a minute gap 12 facing the recording medium 1.
第１の導電体部１３は強磁性薄板１１の対向部１１Ａと
平行に配設され２両端はリード線１７゜１８が接続され
ている。第２の導電体部１４は強磁性薄板１１を捲回す
るように配設され２両端にリード線１９．２０が接続さ
れて構成されている。The first conductor portion 13 is arranged parallel to the facing portion 11A of the ferromagnetic thin plate 11, and lead wires 17 and 18 are connected to both ends thereof. The second conductor section 14 is arranged so as to wind the ferromagnetic thin plate 11, and has lead wires 19 and 20 connected to both ends thereof.
そこで、リード線１９よりリード線２０へ電流ｊ１１．
リート線１７よりリード線１８へ電流Ｌｚを流すとそれ
ぞれの導電体部１４と１３との周囲に磁界が発生し、導
電体部１４の発生磁界により強磁性薄板１１には（ｂ）
に示すＭｌ ＋方向に磁化され、一方、導電体部１３の
発生磁界による磁化方向はに４１２となる。従って、こ
のＭＩ＋及びＭｌ２の和Ｍ＋、が対四部１１Ａの磁化方
向となる。センス電流ｉｏはリード線１６よりリード線
１５へ供給されるようにしたものである。Therefore, a current j11. is transferred from the lead wire 19 to the lead wire 20.
When a current Lz is passed from the lead wire 17 to the lead wire 18, a magnetic field is generated around each of the conductor parts 14 and 13, and the magnetic field generated by the conductor part 14 causes the ferromagnetic thin plate 11 to have a magnetic field (b).
On the other hand, the magnetization direction due to the magnetic field generated by the conductor portion 13 is 412. Therefore, the sum M+ of MI+ and Ml2 becomes the magnetization direction of the pair of four parts 11A. The sense current io is supplied from the lead wire 16 to the lead wire 15.
記録媒体１よりの信号磁界は矢印Ｈｙの方向であり、磁
化Ｍ＋３の方向を再生に最適な４０〜５ｏ“角度を保持
するためには導電体部１３と１４とに流すそれぞれの電
流Ｌｚと ｆ＋＋とを調節することで容易に行える。The signal magnetic field from the recording medium 1 is in the direction of the arrow Hy, and in order to maintain the direction of magnetization M+3 at an angle of 40 to 5 degrees, which is optimal for reproduction, currents Lz and f++ are applied to the conductor parts 13 and 14, respectively. This can be easily done by adjusting the
従来のように形状異方性などによる磁化容易軸の配向の
問題はなくなる。There is no longer the problem of orientation of the axis of easy magnetization due to shape anisotropy, as in the past.
（ｆ）発明の詳細
な説明したように本発明は磁気抵抗効果素子は強磁性薄
板１１に導電体部１３と１４とを配設して、それぞれよ
りバイアス磁界を印加することにより磁化方向Ｍｌ＋と
Ｍｌ２とを発生させた対向部１１Ａによって形成したも
のである。これにより。(f) Detailed Description of the Invention As described above, the present invention provides a magnetoresistive element in which the conductive parts 13 and 14 are arranged on the ferromagnetic thin plate 11, and the magnetization direction Ml+ is changed by applying a bias magnetic field from each of the conductive parts 13 and 14. It is formed by the facing portion 11A that generates Ml2. Due to this.
磁気抵抗効果素子の磁化方向を所定の方向に設定すのこ
とが可能となり、更に、その形状に制限されず、かつ、
配向も不要となり実用効果は大である。It becomes possible to set the magnetization direction of the magnetoresistive element in a predetermined direction, and furthermore, it is not limited to its shape, and
Orientation is also unnecessary, and the practical effect is great.
第１図は従来の磁気ヘッドの構成を示す（ａ）は斜視図
、 （ｂ）は説明図、第２図は本発明による磁気ヘッド
の一実施例を示す（ａ）は斜視図。
（ｂ）は説明図を示す。
図中において、１は記録媒体、２は磁気抵抗効果素子、
３．１３．１４は導電体部、１１は強磁性情板、１２は
微小空隙、１５，１６，１７．１竿１ 閃
（α）
＜ｂ）
竿２ 閃
（ｂ）FIG. 1 shows the configuration of a conventional magnetic head; (a) is a perspective view; FIG. 2(b) is an explanatory view; FIG. 2 shows an embodiment of the magnetic head according to the present invention; (a) is a perspective view. (b) shows an explanatory diagram. In the figure, 1 is a recording medium, 2 is a magnetoresistive element,
3.13.14 is a conductor part, 11 is a ferromagnetic information plate, 12 is a microgap, 15, 16, 17.1 Rod 1 Flash (α) <b) Rod 2 Flash (b)
Claims (1)
には所定方向の第１のバイアス磁界を印加せしめる該強
磁性部材と平行に配設された第１の導電体部と、該第１
のバイアス磁界に直交する方向の第２のバイアス磁界を
印加せしめる該強磁性部材を捲回するように配設された
第２の導電体部とによって形成された磁気抵抗効果素子
が具備されたことを特徴とする磁気ヘッド。a ferromagnetic member; a first conductor portion disposed parallel to the ferromagnetic member for applying a first bias magnetic field in a predetermined direction to a predetermined location where the ferromagnetic member faces the medium; 1
a magnetoresistive element formed by a second conductor portion arranged so as to wind the ferromagnetic member and applying a second bias magnetic field in a direction perpendicular to the bias magnetic field; A magnetic head featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22875482A JPS59121616A (en) | 1982-12-28 | 1982-12-28 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22875482A JPS59121616A (en) | 1982-12-28 | 1982-12-28 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59121616A true JPS59121616A (en) | 1984-07-13 |
Family
ID=16881299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22875482A Pending JPS59121616A (en) | 1982-12-28 | 1982-12-28 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59121616A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59129922A (en) * | 1983-01-14 | 1984-07-26 | シーゲイト テクノロジー インターナショナル | Magnetic head |
| JPS62110615A (en) * | 1985-11-08 | 1987-05-21 | Matsushita Electric Ind Co Ltd | Thin film magnetic head |
| JPS6482311A (en) * | 1987-09-24 | 1989-03-28 | Hitachi Ltd | Magnetic head |
-
1982
- 1982-12-28 JP JP22875482A patent/JPS59121616A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59129922A (en) * | 1983-01-14 | 1984-07-26 | シーゲイト テクノロジー インターナショナル | Magnetic head |
| JPH0339324B2 (en) * | 1983-01-14 | 1991-06-13 | Maguneteitsuku Perifueraruzu Inc | |
| JPS62110615A (en) * | 1985-11-08 | 1987-05-21 | Matsushita Electric Ind Co Ltd | Thin film magnetic head |
| JPS6482311A (en) * | 1987-09-24 | 1989-03-28 | Hitachi Ltd | Magnetic head |
| US4922360A (en) * | 1987-09-24 | 1990-05-01 | Hitachi, Ltd. | Magnetic head |
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