JPH08167118A - Magnetoresistance effect head - Google Patents
Magnetoresistance effect headInfo
- Publication number
- JPH08167118A JPH08167118A JP30905194A JP30905194A JPH08167118A JP H08167118 A JPH08167118 A JP H08167118A JP 30905194 A JP30905194 A JP 30905194A JP 30905194 A JP30905194 A JP 30905194A JP H08167118 A JPH08167118 A JP H08167118A
- Authority
- JP
- Japan
- Prior art keywords
- magnetoresistive effect
- effect element
- head
- magnetoresistive
- flux guide
- 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.)
- Granted
Links
Landscapes
- Magnetic Heads (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は磁気ディスク装置或いは
磁気テープ装置等の磁気記録再生装置に用いられる薄膜
磁気ヘッドに関し、特に磁気抵抗効果により記録媒体に
記録された情報を再生する磁気抵抗効果ヘッドに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin film magnetic head used in a magnetic recording / reproducing device such as a magnetic disk device or a magnetic tape device, and more particularly to a magnetoresistive head for reproducing information recorded on a recording medium by a magnetoresistive effect. Regarding
【０００２】近年、磁気ディスク装置の小型化・高密度
化に伴い、ヘッドスライダの浮上量が減少し、ごく低浮
上或いはスライダが記録媒体に接触する接触記録／再生
の実現が望まれている。In recent years, with the miniaturization and higher density of magnetic disk devices, the flying height of the head slider has decreased, and it has been desired to realize very low flying height or contact recording / reproduction in which the slider contacts a recording medium.
【０００３】また、従来の磁気誘導ヘッドは、磁気ディ
スクの小径化により周速（ヘッドと媒体との間の相対速
度）が減少すると、再生出力が劣化する。そこで、再生
出力が周速に依存せず、低周速でも大出力の得られる磁
気抵抗効果ヘッド（以下ＭＲヘッドと略称する）の開発
が望まれている。Further, in the conventional magnetic induction head, the reproduction output deteriorates when the peripheral speed (relative speed between the head and the medium) decreases due to the reduction in diameter of the magnetic disk. Therefore, it is desired to develop a magnetoresistive effect head (hereinafter referred to as an MR head) that can obtain a large output even if the reproduction output does not depend on the peripheral speed and is low.
【０００４】[0004]
【従来の技術】ＭＲヘッドは磁気抵抗効果素子に一定の
センス電流を供給して、記録媒体の記録トラックから漏
洩する信号磁界の大きさの変化を抵抗変化に変換し、媒
体に記録された情報を電圧値の変化として再生する。2. Description of the Related Art An MR head supplies a constant sense current to a magnetoresistive effect element, converts a change in the magnitude of a signal magnetic field leaking from a recording track of a recording medium into a resistance change, and records information on the medium. Is reproduced as a change in voltage value.
【０００５】従来のＭＲヘッドでは、磁気抵抗効果素子
がヘッドの媒体対向面に露出していた。そのため金属製
の記録媒体と組み合わせてのごく低浮上、接触記録の実
現は記録媒体との短絡や放電のため非常に困難であっ
た。In the conventional MR head, the magnetoresistive effect element is exposed on the medium facing surface of the head. Therefore, it has been very difficult to realize contact recording with extremely low flying height in combination with a metal recording medium due to short circuit with the recording medium or discharge.
【０００６】そこで本発明者らは、磁気抵抗効果素子が
ヘッドの媒体対向面に露出せず、軟磁性層からなるフラ
ックスガイドによって媒体からの漏洩磁界を磁気抵抗効
果素子に導く構造の、フラックスガイド型磁気抵抗効果
ヘッドを特開平５−１１４１１９号で提案した。Therefore, the present inventors have proposed a flux guide having a structure in which the magnetoresistive effect element is not exposed on the medium facing surface of the head, and a magnetic flux leaking from the medium is guided to the magnetoresistive effect element by a flux guide composed of a soft magnetic layer. Type magnetoresistive head was proposed in JP-A-5-114119.
【０００７】この公開公報に開示されたＭＲヘッドは、
記録媒体に対向するヘッドの先端面から後退して設けら
れたＮｉ−Ｆｅからなる磁気抵抗効果素子と、磁気抵抗
効果素子に接続され、その間に磁気抵抗効果素子のセン
ス領域を画成する一対の端子を含んでおり、これらの端
子には一定のセンス電流が供給される。The MR head disclosed in this publication is
A magnetoresistive effect element made of Ni—Fe provided receding from the front end surface of the head facing the recording medium, and a pair of magnetoresistive effect elements connected to the magnetoresistive effect element and defining a sense region of the magnetoresistive effect element therebetween. It includes terminals, to which a constant sense current is supplied.
【０００８】ＭＲヘッドは更に、一端がヘッドの先端面
に露出し他端が磁気抵抗効果素子の一端に磁気的に結合
した、記録媒体からの磁束を磁気抵抗効果素子に案内す
るフラックスガイドを含んでいる。The MR head further includes a flux guide for guiding the magnetic flux from the recording medium to the magnetoresistive effect element, one end of which is exposed at the tip surface of the head and the other end of which is magnetically coupled to one end of the magnetoresistive effect element. I'm out.
【０００９】フラックスガイド、磁気抵抗効果素子及び
端子は、非磁性絶縁層中に埋め込まれており、一対の上
下磁気シールドが非磁性絶縁層をその間にサンドイッチ
するように設けられて、ヘッドの先端面に記録媒体から
の磁束を受け入れるギャップを画成している。The flux guide, the magnetoresistive effect element, and the terminal are embedded in a non-magnetic insulating layer, and a pair of upper and lower magnetic shields are provided so as to sandwich the non-magnetic insulating layer therebetween, and the head end face is provided. Defines a gap for receiving the magnetic flux from the recording medium.
【００１０】一対の端子により画成される磁気抵抗効果
素子のセンス領域は、記録媒体上の記録トラック幅より
も広く形成してある。フラックスガイドの平面形状は、
台形状、ホームベース形状、又は三角形状等をしてお
り、磁気抵抗効果素子のセンス領域よりその幅が狭く形
成されている。The sense region of the magnetoresistive effect element defined by the pair of terminals is formed wider than the recording track width on the recording medium. The planar shape of the flux guide is
It has a trapezoidal shape, a home base shape, a triangular shape, or the like, and its width is formed narrower than the sense region of the magnetoresistive effect element.
【００１１】[0011]
【発明が解決しようとする課題】しかし、上記公開公報
に記載された従来のフラックスガイド型ＭＲヘッドにお
いては、幅の狭いフラックスガイドを採用していたた
め、その磁区制御が困難であった。その結果、フラック
スガイド自身の磁区変動によって、磁気抵抗効果素子の
再生出力及び再生波形が影響を受けて変動しやすくなる
という問題があった。However, in the conventional flux guide type MR head described in the above-mentioned publication, a narrow flux guide is adopted, so that it is difficult to control the magnetic domain. As a result, there is a problem that the reproduction output and the reproduction waveform of the magnetoresistive effect element are affected by the fluctuation of the magnetic domain of the flux guide itself, and are easily changed.
【００１２】この問題を解決するために、フラックスガ
イドを記録トラックの幅方向に伸長して概略細長い長方
形状とし、その上に反強磁性膜を積層した磁気抵抗効果
ヘッドを先に提案した（特願平５−３０２６３７号）。In order to solve this problem, a magnetoresistive head in which a flux guide is extended in the width direction of a recording track to have a substantially elongated rectangular shape and an antiferromagnetic film is laminated thereon has been previously proposed (special feature: No. 5-302637).
【００１３】この先願発明によると、フラックスガイド
の単磁区構造を実現できるため、フラックスガイドの磁
区変動に起因する磁気抵抗効果素子の再生出力及び再生
波形の変動を有効に防止することができる。According to the invention of the prior application, since the single domain structure of the flux guide can be realized, it is possible to effectively prevent the fluctuation of the reproducing output and the reproducing waveform of the magnetoresistive element due to the fluctuation of the magnetic domain of the flux guide.
【００１４】しかし、この先願発明では磁気抵抗効果素
子及びフラックスガイドの磁化方向は、その上に積層し
た反強磁性膜の効果によって同一方向に決定されている
ので、互いに発生する磁界のため、磁気抵抗効果素子の
感度低下及びフラックスガイドの透磁率の低下を引き起
こすという問題があった。However, in this prior invention, the magnetization directions of the magnetoresistive effect element and the flux guide are determined in the same direction by the effect of the antiferromagnetic film laminated on the magnetoresistive effect element and the flux guide. There is a problem that the sensitivity of the resistance effect element is lowered and the magnetic permeability of the flux guide is lowered.
【００１５】本発明はこのような点に鑑みてなされたも
のであり、その目的とするところは、磁気抵抗効果素子
及びフラックスガイドの感度を向上することができ、再
生出力の高い磁気抵抗効果ヘッドを提供することであ
る。The present invention has been made in view of the above circumstances, and an object thereof is to improve the sensitivity of the magnetoresistive effect element and the flux guide and to provide a high magnetoresistive effect head having a high reproduction output. Is to provide.
【００１６】[0016]
【課題を解決するための手段】本発明は、記録媒体に記
録された情報を再生する磁気抵抗効果ヘッドであって、
記録媒体の記録トラックから漏洩する信号磁界の変化を
抵抗変化に変換する、該記録媒体に対向する前記ヘッド
の先端面から後退して設けられた磁気抵抗効果素子と；
前記磁気抵抗効果素子に接続され、その間に磁気抵抗効
果素子のセンス領域を画成する一対の端子と；一端が前
記ヘッドの先端面に露出し他端が前記磁気抵抗効果素子
の一端に磁気的に結合した、記録媒体からの磁束を前記
磁気抵抗効果素子に案内する前部フラックスガイドと；
前記磁気抵抗効果素子の中央部分を除いてその両側部分
上に積層された、記録トラックの幅方向に平行な第１の
磁化方向を有する第１磁性膜と；前記前部フラックスガ
イドの中央部分を除いてその両側部分上に積層された、
前記第１の磁化方向と反対方向の第２の磁化方向を有す
る第２磁性膜を具備し；前記前部フラックスガイドは前
記磁気抵抗効果素子のセンス領域を超えて前記記録媒体
の記録トラックの幅方向に伸長した概略長方形状をして
いる磁気抵抗効果ヘッドを提供する。SUMMARY OF THE INVENTION The present invention is a magnetoresistive head for reproducing information recorded on a recording medium,
A magnetoresistive effect element for converting a change in a signal magnetic field leaking from a recording track of the recording medium into a resistance change, the magnetoresistive element being provided receding from a front end surface of the head facing the recording medium;
A pair of terminals that are connected to the magnetoresistive effect element and define a sense region of the magnetoresistive effect element therebetween; one end is exposed at the tip surface of the head and the other end is magnetically connected to one end of the magnetoresistive effect element. A front flux guide, which is coupled to the front flux guide for guiding the magnetic flux from the recording medium to the magnetoresistive effect element;
A first magnetic film having a first magnetization direction parallel to the width direction of the recording track, which is laminated on both side portions of the magnetoresistive effect element except the central portion; and the central portion of the front flux guide. Laminated on both sides except
A second magnetic film having a second magnetization direction opposite to the first magnetization direction; the front flux guide exceeds the sense region of the magnetoresistive element and the width of the recording track of the recording medium. A magnetoresistive head having a substantially rectangular shape extending in a direction is provided.
【００１７】[0017]
【作用】第１磁性膜と第２磁性膜の磁化方向を逆方向に
規制することにより、磁気抵抗効果素子と前部フラック
スガイドの磁化方向も逆方向に規制される。その結果、
互いに発生する磁界による磁気抵抗効果素子の感度低下
及び前部フラックスガイドの透磁率の低下がなくなり、
再生出力の向上を図ることができる。By regulating the magnetization directions of the first magnetic film and the second magnetic film in opposite directions, the magnetization directions of the magnetoresistive effect element and the front flux guide are also regulated in opposite directions. as a result,
The decrease in the sensitivity of the magnetoresistive element and the decrease in the permeability of the front flux guide due to the magnetic fields generated by each other are eliminated.
The reproduction output can be improved.
【００１８】[0018]
【実施例】以下、本発明の実施例を図面を参照して詳細
に説明する。図１（Ａ）は本発明第１実施例のＭＲヘッ
ド１０の概略平面図、図１（Ｂ）は図１（Ａ）のＢ−Ｂ
線に沿った断面図をそれぞれ示している。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1A is a schematic plan view of an MR head 10 according to the first embodiment of the present invention, and FIG. 1B is BB of FIG. 1A.
Each of the cross-sectional views along the line is shown.
【００１９】例えば、アルミナ−チタニウムカーバイド
（Ａｌ2 Ｏ3 −ＴｉＣ）からなる導電性基板１２上に
は、例えばアルミナ（Ａｌ2 Ｏ3 ）からなる絶縁層１４
が積層されている。For example, an insulating layer 14 made of alumina (Al 2 O 3 ) is formed on the conductive substrate 12 made of alumina-titanium carbide (Al 2 O 3 —TiC).
Are stacked.
【００２０】符号１６，１８は例えばニッケル−鉄（Ｎ
ｉ−Ｆｅ）から形成された第１及び第２磁気シールドで
あり、その間にアルミナからなる非磁性絶縁層２０が介
在されている。Reference numerals 16 and 18 are, for example, nickel-iron (N
The first and second magnetic shields are made of i-Fe), and the non-magnetic insulating layer 20 made of alumina is interposed therebetween.
【００２１】第１及び第２磁気シールド１６，１８はヘ
ッド１０の先端面（媒体対向面）２６に再生分解能を向
上させるためにギャップ２５を画成している。非磁性絶
縁層２０内には、ヘッド１０の先端面２６から離間して
例えばニッケル−鉄（Ｎｉ−Ｆｅ）から形成された磁気
抵抗効果素子２２が埋め込まれている。The first and second magnetic shields 16 and 18 define a gap 25 in the tip surface (medium facing surface) 26 of the head 10 in order to improve reproduction resolution. In the non-magnetic insulating layer 20, a magnetoresistive effect element 22 formed of, for example, nickel-iron (Ni-Fe) is embedded apart from the tip surface 26 of the head 10.
【００２２】非磁性絶縁層２０内には更に、一端がヘッ
ド１０の先端面２６に露出し、他端が磁気抵抗効果素子
２２の一端に磁気的に結合した、例えばニッケル−鉄
（Ｎｉ−Ｆｅ）からなる前部フラックスガイド２４が埋
め込まれている。前部フラックスガイド２４は記録媒体
３４からの磁束を磁気抵抗効果素子２２に案内する。Further, in the non-magnetic insulating layer 20, one end is exposed at the tip surface 26 of the head 10 and the other end is magnetically coupled to one end of the magnetoresistive effect element 22, for example, nickel-iron (Ni-Fe). The front flux guide 24 made of () is embedded. The front flux guide 24 guides the magnetic flux from the recording medium 34 to the magnetoresistive effect element 22.
【００２３】前部フラックスガイド２４は図１（Ａ）を
参照すると明らかなように、磁気抵抗効果素子２２の前
縁に沿って横方向に伸長した長方形状をしている。前部
フラックスガイド２４と磁気抵抗効果素子２２との重な
り部分の間隔は、例えば０．０５〜０．２μｍ程度であ
る。As is apparent from FIG. 1A, the front flux guide 24 has a rectangular shape extending laterally along the front edge of the magnetoresistive effect element 22. The interval between the overlapping portions of the front flux guide 24 and the magnetoresistive effect element 22 is, for example, about 0.05 to 0.2 μm.
【００２４】磁気抵抗効果素子２２のセンス領域２２ａ
は一対の端子２８ａ，２８ｂの間隔で決定され、記録媒
体３４の記録トラック３５の幅よりもその幅が狭く形成
されている。Sense region 22a of magnetoresistive element 22
Is determined by the distance between the pair of terminals 28a and 28b, and is formed to be narrower than the width of the recording track 35 of the recording medium 34.
【００２５】端子２８ａ，２８ｂはセンス電流源３０に
接続されており、磁気抵抗効果素子２２にはセンス電流
源３０から一定のセンス電流が供給される。端子２８
ａ，２８ｂは例えばＡｕ，Ｃｕ，Ａｌ等から形成され
る。The terminals 28a and 28b are connected to a sense current source 30, and a constant sense current is supplied to the magnetoresistive effect element 22 from the sense current source 30. Terminal 28
The a and 28b are made of, for example, Au, Cu, Al or the like.
【００２６】第２磁気シールド１８上には例えばアルミ
ナからなる絶縁保護膜３２が被覆されて、磁気抵抗効果
ヘッド１０が完成する。ヘッド１０の製造はよく知られ
た薄膜プロセスにより行なう。The second magnetic shield 18 is covered with an insulating protective film 32 made of alumina, for example, to complete the magnetoresistive head 10. The head 10 is manufactured by a well-known thin film process.
【００２７】図３に示すように、磁気抵抗効果素子２２
の中央部分を除いたその両側部分上にはＣｒ下地層３８
を介して硬磁性膜４０が積層されている。硬磁性膜４０
はＣｏＣｒＴａ，ＣｏＣｒＰｔ等から形成される。As shown in FIG. 3, the magnetoresistive effect element 22.
Of the Cr underlayer 38 on both sides of the Cr
The hard magnetic film 40 is laminated via the. Hard magnetic film 40
Is formed of CoCrTa, CoCrPt, or the like.
【００２８】同様に、前部フラックスガイド２４の中央
部分を除いたその両側部分上には、Ｃｒ下地層４２を介
して硬磁性膜４４が積層されている。硬磁性膜４４は硬
磁性膜４０と同様に、ＣｏＣｒＴａ，ＣｏＣｒＰｔ等か
ら形成される。Similarly, a hard magnetic film 44 is laminated on both side portions of the front flux guide 24 except for the central portion, with a Cr underlayer 42 interposed therebetween. Like the hard magnetic film 40, the hard magnetic film 44 is made of CoCrTa, CoCrPt, or the like.
【００２９】硬磁性膜４０は記録トラックの幅方向に平
行な第１の磁化方向を有しており、硬磁性膜４４は第１
の磁化方向と反対方向の第２の磁化方向を有している。
よって、磁気抵抗効果素子２２上に硬磁性膜４０が積層
されているため、磁気抵抗効果素子２２は静磁結合によ
り第１の磁化方向と反対方向の第２の磁化方向を有する
ようになる。The hard magnetic film 40 has a first magnetization direction parallel to the width direction of the recording track, and the hard magnetic film 44 has a first magnetization direction.
Has a second magnetization direction opposite to the magnetization direction.
Therefore, since the hard magnetic film 40 is laminated on the magnetoresistive effect element 22, the magnetoresistive effect element 22 comes to have the second magnetization direction opposite to the first magnetization direction due to the magnetostatic coupling.
【００３０】同様に、前部フラックスガイド２４上には
硬磁性膜４４が積層されているため、前部フラックスガ
イド２４は第２の磁化方向と反対方向の第１の磁化方向
を有するようになる。Similarly, since the hard magnetic film 44 is laminated on the front flux guide 24, the front flux guide 24 has a first magnetization direction opposite to the second magnetization direction. .
【００３１】その結果、図３に矢印で示すように、磁気
抵抗効果素子２２及び前部フラックスガイド２４は、互
いに逆の磁化方向を有するように規制される。これによ
り、互いに発生する磁界に起因する磁気抵抗効果素子２
２の感度低下及び前部フラックスガイド２４の透磁率の
低下がなくなり、ＭＲヘッドの再生出力の向上を図るこ
とができる。As a result, as shown by the arrow in FIG. 3, the magnetoresistive effect element 22 and the front flux guide 24 are regulated so as to have opposite magnetization directions. As a result, the magnetoresistive effect element 2 caused by the magnetic fields generated by each other
The sensitivity decrease of No. 2 and the magnetic permeability of the front flux guide 24 are eliminated, and the reproduction output of the MR head can be improved.
【００３２】Ｃｒ下地膜３８，４２の膜厚を制御するこ
とにより、硬磁性膜４０及び４４の保磁力を調整するこ
とができる。尚、硬磁性膜４０を形成しない磁気抵抗効
果素子２２の中央部分の幅と、硬磁性膜４４を形成しな
い前部フラックスガイド２４の中央部分の幅とは異なっ
ていてもかまわない。The coercive force of the hard magnetic films 40 and 44 can be adjusted by controlling the film thickness of the Cr underlayer films 38 and 42. The width of the central portion of the magnetoresistive effect element 22 without the hard magnetic film 40 and the width of the central portion of the front flux guide 24 without the hard magnetic film 44 may be different.
【００３３】然して、記録媒体３４の記録トラック３５
からの信号磁束はヘッド１０内に受け入れられ、前部フ
ラックスガイド２４に案内されて磁気抵抗効果素子２２
に流入し、磁気抵抗効果素子２２を磁化させる。磁気抵
抗効果素子２２を通過した磁束は第１及び第２磁気シー
ルド１６，１８に吸収される。Then, the recording track 35 of the recording medium 34
The signal magnetic flux from the magneto-resistive element 22 is received in the head 10 and guided by the front flux guide 24.
To magnetize the magnetoresistive effect element 22. The magnetic flux that has passed through the magnetoresistive effect element 22 is absorbed by the first and second magnetic shields 16 and 18.
【００３４】磁気抵抗効果素子２２は信号磁束の大きさ
の変化に応じて、その抵抗値が変化する。磁気抵抗効果
素子２２にはセンス電流源３０からの一定のセンス電流
が供給されているので、抵抗値の変化に応じて端子２８
ａ，２８ｂの間の電圧が変化し、記録媒体３４に記録さ
れた情報を電圧信号として再生することができる。The resistance value of the magnetoresistive effect element 22 changes according to the change in the magnitude of the signal magnetic flux. Since a constant sense current is supplied from the sense current source 30 to the magnetoresistive effect element 22, the terminal 28 is changed according to the change of the resistance value.
The voltage between a and 28b changes, and the information recorded on the recording medium 34 can be reproduced as a voltage signal.
【００３５】本実施例では、前部フラックスガイド２４
がセンス領域２２ａ及び記録トラック３５の幅を越えて
横方向に伸長した長方形状をしているので、前部フラッ
クスガイド２４の形状異方性により、その磁化容易軸方
向を記録トラック３５の幅方向に平行にすることがで
き、容易に単磁区構造を実現できる。In this embodiment, the front flux guide 24
Has a rectangular shape extending in the lateral direction beyond the widths of the sense region 22a and the recording track 35, the shape anisotropy of the front flux guide 24 causes the easy axis of magnetization to be in the width direction of the recording track 35. Can be parallel to, and a single domain structure can be easily realized.
【００３６】更に、磁気抵抗効果素子２２及び前部フラ
ックスガイド２４は互いに逆の磁化方向を有しているの
で、互いに発生する磁界に起因する磁気抵抗効果素子２
２の感度低下及び前部フラックスガイド２４の透磁率の
低下がなくなり、再生出力の向上を図ることができる。Further, since the magnetoresistive effect element 22 and the front flux guide 24 have opposite magnetization directions, the magnetoresistive effect element 2 caused by the magnetic fields generated by each other.
2 and the magnetic permeability of the front flux guide 24 does not decrease, and the reproduction output can be improved.
【００３７】図２を参照すると、本発明第２実施例のＭ
Ｒヘッドの平面図（Ａ）及び断面図（Ｂ）が示されてい
る。図１に示した第１実施例と実質的に同一構成部分に
ついては同一符号を付し、重複を避けるためその説明を
省略する。Referring to FIG. 2, the M of the second embodiment of the present invention.
A plan view (A) and a sectional view (B) of the R head are shown. The same components as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted to avoid duplication.
【００３８】本実施例は図１に示した第１実施例に後部
フラックスガイド３６を追加したものである。後部フラ
ックスガイド３６は、前部フラックスガイド２４と同様
に、例えばニッケル−鉄（Ｎｉ−Ｆｅ）から形成されて
おり、その一端が磁気抵抗効果素子２２に磁気的に結合
している。In this embodiment, a rear flux guide 36 is added to the first embodiment shown in FIG. Like the front flux guide 24, the rear flux guide 36 is made of, for example, nickel-iron (Ni-Fe), and one end thereof is magnetically coupled to the magnetoresistive effect element 22.
【００３９】図２（Ａ）のIII ′−III ′断面図は図３
に示した図１（Ａ）のIII −III 断面図に類似してお
り、後部フラックスガイド３６の中央部分を除いたその
両側部分上には、Ｃｒ下地層を介して硬磁性膜４８が積
層されている。硬磁性膜４８は硬磁性膜４４と同一の磁
化方向を有している。よって、後部フラックスガイド３
６は前部フラックスガイド２４と同一の磁化方向を有し
ている。The sectional view taken along line III'-III 'of FIG. 2A is shown in FIG.
1A is similar to the sectional view taken along line III-III of FIG. 1A, and a hard magnetic film 48 is laminated on both side portions of the rear flux guide 36 except for the central portion thereof with a Cr underlayer interposed therebetween. ing. The hard magnetic film 48 has the same magnetization direction as the hard magnetic film 44. Therefore, the rear flux guide 3
6 has the same magnetization direction as the front flux guide 24.
【００４０】本実施例では、後部フラックスガイド３６
を設けたことにより、上述した第１実施例の効果に加え
て、磁気抵抗効果素子２２の反磁界を抑制して、再生出
力を向上させる効果を有している。In this embodiment, the rear flux guide 36
In addition to the effects of the first embodiment described above, the provision of the above-described structure has the effect of suppressing the demagnetizing field of the magnetoresistive effect element 22 and improving the reproduction output.
【００４１】図４を参照すると、本発明の他の実施例の
断面図が示されている。図４（Ａ）は図３に示した構造
と類似しており、磁気抵抗効果素子２２及び前部フラッ
クスガイド２４の下側に硬磁性膜４０及び４４をそれぞ
れ形成したものである。各膜の磁化方向が矢印で示され
ている。本実施例は図３に示した実施例と同様に作用す
る。Referring to FIG. 4, there is shown a cross-sectional view of another embodiment of the present invention. FIG. 4A is similar to the structure shown in FIG. 3 and has hard magnetic films 40 and 44 formed below the magnetoresistive effect element 22 and the front flux guide 24, respectively. The magnetization direction of each film is indicated by an arrow. This embodiment operates in the same manner as the embodiment shown in FIG.
【００４２】図４（Ｂ）に示す実施例においては、磁気
抵抗効果素子２２′がトラック３５の幅方向に短く、そ
の幅全体がセンス領域となっており、前部フラックスガ
イド２４′は磁気抵抗効果素子２２′と概略等しい幅に
形成されている。そして、磁気抵抗効果素子２２′及び
前部フラックスガイド２４′の両側にそれぞれ硬磁性膜
４０，４４が形成されている。In the embodiment shown in FIG. 4B, the magnetoresistive effect element 22 'is short in the width direction of the track 35, and the entire width thereof serves as a sense region, and the front flux guide 24' has a magnetoresistive effect. It has a width substantially equal to that of the effect element 22 '. Hard magnetic films 40 and 44 are formed on both sides of the magnetoresistive effect element 22 'and the front flux guide 24', respectively.
【００４３】硬磁性膜４０と硬磁性膜４４は互いに逆の
磁化方向を有するように規定される。これにより、磁気
抵抗効果素子２２′の磁化方向は静磁結合により硬磁性
膜４０の磁化方向と同一方向となり、前部フラックスガ
イド２４′の磁化方向は硬磁性膜４４の磁化方向と同一
方向となり、上述した各実施例と同様な効果を達成する
ことができる。The hard magnetic film 40 and the hard magnetic film 44 are defined so as to have opposite magnetization directions. As a result, the magnetization direction of the magnetoresistive effect element 22 'becomes the same as the magnetization direction of the hard magnetic film 40 due to magnetostatic coupling, and the magnetization direction of the front flux guide 24' becomes the same direction as the magnetization direction of the hard magnetic film 44. It is possible to achieve the same effects as those of the respective embodiments described above.
【００４４】図４（Ｃ）に示した実施例は、磁気抵抗効
果素子２２の中央部分を除いてその両側部分上に反強磁
性膜４６を積層し、硬磁性膜４４の上に前部フラックス
ガイド２４を積層したものである。反強磁性膜４６はＦ
ｅＭｎ，ＮｉＯ等から形成される。In the embodiment shown in FIG. 4C, an antiferromagnetic film 46 is laminated on both sides of the magnetoresistive effect element 22 except for the central part thereof, and the front flux is formed on the hard magnetic film 44. The guide 24 is laminated. The antiferromagnetic film 46 is F
It is formed from eMn, NiO, or the like.
【００４５】本実施例においては、磁気抵抗効果素子２
２は静磁結合により反強磁性膜４６の磁化方向が転写さ
れるため、硬磁性膜４４と反強磁性膜４６を同一方向に
着磁する。これにより、磁気抵抗効果素子２２と前部フ
ラックスガイド２４は互いに逆の磁化方向を有するよう
になる。In this embodiment, the magnetoresistive effect element 2 is used.
In No. 2, the magnetization direction of the antiferromagnetic film 46 is transferred by magnetostatic coupling, so that the hard magnetic film 44 and the antiferromagnetic film 46 are magnetized in the same direction. As a result, the magnetoresistive effect element 22 and the front flux guide 24 have opposite magnetization directions.
【００４６】図４（Ｃ）に示した実施例の変形例とし
て、硬磁性膜で磁気抵抗効果素子２２の磁化方向を規定
し、反強磁性膜で前部フラックスガイド２４の磁化方向
を規定するようにしてもよい。As a modification of the embodiment shown in FIG. 4C, the hard magnetic film defines the magnetization direction of the magnetoresistive effect element 22, and the antiferromagnetic film defines the magnetization direction of the front flux guide 24. You may do it.
【００４７】図５（Ａ）及び図５（Ｂ）を参照して、本
発明の更に他の実施例について説明する。図５（Ａ）に
示した実施例は、磁気抵抗効果素子２２の中央部分を除
いてその両側部分上に反強磁性膜４６を積層し、前部フ
ラックスガイド２４′の両側に硬磁性膜４４を形成した
ものである。Still another embodiment of the present invention will be described with reference to FIGS. 5 (A) and 5 (B). In the embodiment shown in FIG. 5A, an antiferromagnetic film 46 is laminated on both sides of the magnetoresistive effect element 22 except for the central part thereof, and the hard magnetic film 44 is formed on both sides of the front flux guide 24 '. Is formed.
【００４８】本実施例においては、硬磁性膜４４と反強
磁性膜４６とを反対方向に着磁する。これにより、磁気
抵抗効果素子２２と前部フラックスガイド２４′は互い
に逆の磁化方向を有するようになる。In this embodiment, the hard magnetic film 44 and the antiferromagnetic film 46 are magnetized in opposite directions. As a result, the magnetoresistive effect element 22 and the front flux guide 24 'have opposite magnetization directions.
【００４９】図５（Ｂ）に示した実施例は、磁気抵抗効
果素子２２′の両側に硬磁性膜４０を形成し、前部フラ
ックスガイド２４の中央部分を除いてその両側部分上に
反強磁性膜４８を積層したものである。In the embodiment shown in FIG. 5B, hard magnetic films 40 are formed on both sides of the magnetoresistive effect element 22 ', and anti-strength is applied on both sides of the front flux guide 24 except for the central portion. The magnetic film 48 is laminated.
【００５０】本実施例においても、硬磁性膜４０と反強
磁性膜４８とは逆方向に着磁する。これにより、磁気抵
抗効果素子２２′と前部フラックスガイド２４は互いに
逆の磁化方向を有するようになる。Also in this embodiment, the hard magnetic film 40 and the antiferromagnetic film 48 are magnetized in opposite directions. As a result, the magnetoresistive effect element 22 'and the front flux guide 24 have opposite magnetization directions.
【００５１】次に図６を参照して、磁化方向の規定方法
を説明する。ＣｏＣｒＴａ等からなる硬磁性膜４０，４
４は、例えばＣｒ下地層の膜厚を変化させることによ
り、保磁力Ｈｃを１００〜２０００エルステッド（Ｏ
ｅ）程度に変化させることができる。Next, the method of defining the magnetization direction will be described with reference to FIG. Hard magnetic films 40, 4 made of CoCrTa or the like
No. 4 has a coercive force Hc of 100 to 2000 Oersted (O) by changing the film thickness of the Cr underlayer.
e) It can be changed to a degree.
【００５２】図６（Ａ）に示すように、磁気抵抗効果素
子２２′の両側に保磁力Ｈｃが５００ＯｅのＣｏＣｒＴ
ａ膜４０を設置し、前部フラックスガイド２４′の両側
に保磁力Ｈｃが１０００ＯｅのＣｏＣｒＴａ膜４４を設
置する。As shown in FIG. 6A, CoCrT having a coercive force Hc of 500 Oe is formed on both sides of the magnetoresistive element 22 '.
The a film 40 is provided, and the CoCrTa films 44 having a coercive force Hc of 1000 Oe are provided on both sides of the front flux guide 24 '.
【００５３】そして、１０００Ｏｅより大きい外部磁界
Ｈを印加して、硬磁性膜４０，４４の磁化方向を揃え
る。図６（Ｂ）は外部磁界の印加を停止した状態を示し
ている。Then, an external magnetic field H larger than 1000 Oe is applied to align the magnetization directions of the hard magnetic films 40 and 44. FIG. 6B shows a state in which the application of the external magnetic field is stopped.
【００５４】次いで、図６（Ｃ）に示すように、５００
Ｏｅより大きく１０００Ｏｅより小さい外部磁界Ｈを逆
方向に印加して、磁気抵抗効果素子２２′の両側の硬磁
性膜４０のみの磁化方向を反転させる。外部磁界の印加
を停止すれば、図６（Ｄ）に示すように磁気抵抗効果素
子２２′及び前部フラックスガイド２４′の磁化方向を
逆方向に規定することができる。Then, as shown in FIG.
An external magnetic field H larger than Oe and smaller than 1000 Oe is applied in the opposite direction to reverse the magnetization direction of only the hard magnetic film 40 on both sides of the magnetoresistive effect element 22 '. When the application of the external magnetic field is stopped, the magnetization directions of the magnetoresistive effect element 22 'and the front flux guide 24' can be defined in opposite directions as shown in FIG. 6 (D).
【００５５】[0055]
【発明の効果】本発明は以上詳述したように、磁気抵抗
効果素子とフラックスガイドの磁化方向を逆方向に規定
することにより、互いに発生する磁界に起因する磁気抵
抗効果素子の感度低下及びフラックスガイドの透磁率の
低下を防止することができ、ＭＲヘッドの再生出力の向
上を図ることができるという効果を奏する。As described in detail above, the present invention defines the magnetization directions of the magnetoresistive effect element and the flux guide in opposite directions, thereby reducing the sensitivity and flux of the magnetoresistive effect element due to the magnetic fields generated by each other. The magnetic permeability of the guide can be prevented from decreasing, and the reproduction output of the MR head can be improved.
【図１】本発明第１実施例を示す図である。FIG. 1 is a diagram showing a first embodiment of the present invention.
【図２】本発明第２実施例を示す図である。FIG. 2 is a diagram showing a second embodiment of the present invention.
【図３】図１及び図２のIII-III 線断面図である。FIG. 3 is a sectional view taken along line III-III of FIGS. 1 and 2.
【図４】本発明の他の実施例断面図である。FIG. 4 is a sectional view of another embodiment of the present invention.
【図５】本発明の更に他の実施例断面図である。FIG. 5 is a sectional view of still another embodiment of the present invention.
【図６】磁化方向の規定方法説明図である。FIG. 6 is an explanatory diagram of a method of defining a magnetization direction.
２２ 磁気抵抗効果素子 ２４ 前部フラックスガイド ３４ 記録媒体 ３５ 記録トラック ３６ 後部フラックスガイド ４０，４４，４８ 硬磁性膜 ４６ 反強磁性膜 22 Magnetoresistive Element 24 Front Flux Guide 34 Recording Medium 35 Recording Track 36 Rear Flux Guide 40, 44, 48 Hard Magnetic Film 46 Antiferromagnetic Film
Claims (16)
気抵抗効果ヘッドであって、 記録媒体の記録トラックから漏洩する信号磁界の変化を
抵抗変化に変換する、該記録媒体に対向する前記ヘッド
の先端面から後退して設けられた磁気抵抗効果素子と；
前記磁気抵抗効果素子に接続され、その間に磁気抵抗効
果素子のセンス領域を画成する一対の端子と；一端が前
記ヘッドの先端面に露出し他端が前記磁気抵抗効果素子
の一端に磁気的に結合した、記録媒体からの磁束を前記
磁気抵抗効果素子に案内する前部フラックスガイドと；
前記磁気抵抗効果素子の中央部分を除いてその両側部分
上に積層された、記録トラックの幅方向に平行な第１の
磁化方向を有する第１磁性膜と；前記前部フラックスガ
イドの中央部分を除いてその両側部分上に積層された、
前記第１の磁化方向と反対方向の第２の磁化方向を有す
る第２磁性膜とを具備し；前記前部フラックスガイドは
前記磁気抵抗効果素子のセンス領域を超えて前記記録媒
体の記録トラックの幅方向に伸長した概略長方形状をし
ている磁気抵抗効果ヘッド。1. A magnetoresistive effect head for reproducing information recorded on a recording medium, wherein the head is opposed to the recording medium and converts a change in a signal magnetic field leaking from a recording track of the recording medium into a resistance change. A magnetoresistive effect element provided so as to recede from the front end surface of;
A pair of terminals that are connected to the magnetoresistive effect element and define a sense region of the magnetoresistive effect element therebetween; one end is exposed at the tip surface of the head and the other end is magnetically connected to one end of the magnetoresistive effect element. A front flux guide, which is coupled to the front flux guide for guiding the magnetic flux from the recording medium to the magnetoresistive effect element;
A first magnetic film having a first magnetization direction parallel to the width direction of the recording track, which is laminated on both side portions of the magnetoresistive effect element except the central portion; and the central portion of the front flux guide. Laminated on both sides except
A second magnetic film having a second magnetization direction opposite to the first magnetization direction; the front flux guide extends beyond a sense region of the magnetoresistive effect element to a recording track of the recording medium. A magnetoresistive head having a substantially rectangular shape extending in the width direction.
に異なる硬磁性膜から構成される請求項１記載の磁気抵
抗効果ヘッド。2. The magnetoresistive head according to claim 1, wherein the first and second magnetic films are hard magnetic films having different coercive forces.
層されており、前記第２磁性膜は第２Ｃｒ下地膜上に積
層されており、該第１及び第２Ｃｒ下地膜の膜厚を変化
させることによって前記第１及び第２磁性膜の保磁力の
大きさを異ならせた請求項２記載の磁気抵抗効果ヘッ
ド。3. The first magnetic film is laminated on a first Cr underlayer film, the second magnetic film is laminated on a second Cr underlayer film, and the film thickness of the first and second Cr underlayer films. 3. The magnetoresistive head according to claim 2, wherein the magnitudes of the coercive forces of the first and second magnetic films are made different by changing the value.
及びＣｏＣｒＰｔのいずれか一方から構成される請求項
２記載の磁気抵抗効果ヘッド。4. The first and second magnetic films are CoCrTa.
3. The magnetoresistive head according to claim 2, wherein the magnetoresistive head is composed of one of CoCrPt and CoCrPt.
気抵抗効果ヘッドであって、 記録媒体の記録トラックから漏洩する信号磁界の変化を
抵抗変化に変換する、該記録媒体に対向する前記ヘッド
の先端面から後退して設けられた磁気抵抗効果素子と；
前記磁気抵抗効果素子に接続され、その間に磁気抵抗効
果素子のセンス領域を画成する一対の端子と；一端が前
記ヘッドの先端面に露出し他端が前記磁気抵抗効果素子
の一端に磁気的に結合した、記録媒体からの磁束を前記
磁気抵抗効果素子に案内する前部フラックスガイドと；
前記磁気抵抗効果素子の中央部分を除いてその両側部分
上に積層された、記録トラックの幅方向に平行な第１の
磁化方向を有する第１磁性膜と；前記前部フラックスガ
イドの中央部分を除いてその両側部分上に積層された、
前記第１の磁化方向と同一の磁化方向を有する第２磁性
膜とを具備し；前記前部フラックスガイドは前記磁気抵
抗効果素子のセンス領域を超えて前記記録媒体の記録ト
ラックの幅方向に伸長した概略長方形状をしており；前
記第１及び第２磁性膜のうち一方は硬磁性膜から構成さ
れ、他方は反強磁性膜から構成される磁気抵抗効果ヘッ
ド。5. A magnetoresistive effect head for reproducing information recorded on a recording medium, said head facing said recording medium, converting a change of a signal magnetic field leaking from a recording track of said recording medium into a resistance change. A magnetoresistive effect element provided so as to recede from the front end surface of;
A pair of terminals that are connected to the magnetoresistive effect element and define a sense region of the magnetoresistive effect element therebetween; one end is exposed at the tip surface of the head and the other end is magnetically connected to one end of the magnetoresistive effect element. A front flux guide, which is coupled to the front flux guide for guiding the magnetic flux from the recording medium to the magnetoresistive effect element;
A first magnetic film having a first magnetization direction parallel to the width direction of the recording track, which is laminated on both side portions of the magnetoresistive effect element except the central portion; and the central portion of the front flux guide. Laminated on both sides except
A second magnetic film having the same magnetization direction as the first magnetization direction; the front flux guide extends beyond the sense region of the magnetoresistive element in the width direction of the recording track of the recording medium. The magnetoresistive head has a substantially rectangular shape; one of the first and second magnetic films is a hard magnetic film and the other is an antiferromagnetic film.
いずれか一方から構成される請求項５記載の磁気抵抗効
果ヘッド。6. The magnetoresistive head according to claim 5, wherein the antiferromagnetic film is made of one of FeMn and NiO.
気的に結合した後部フラックスガイドと、該後部フラッ
クスガイドの中央部分を除いてその両側部分上に積層さ
れた、前記第１の磁化方向と反対方向の第２の磁化方向
を有する第３磁性膜を更に具備し；前記後部フラックス
ガイドは前記磁気抵抗効果素子のセンス領域を超えて前
記記録媒体の記録トラックの幅方向に伸長した概略長方
形状をしている請求項１記載の磁気抵抗効果ヘッド。7. A rear flux guide, one end of which is magnetically coupled to the other end of the magnetoresistive effect element, and the first magnetization, which is laminated on both side portions of the rear flux guide except for a central portion thereof. A third magnetic film having a second magnetization direction opposite to the direction; the rear flux guide extends beyond the sense region of the magnetoresistive element in the width direction of the recording track of the recording medium. The magnetoresistive head according to claim 1, which has a rectangular shape.
気抵抗効果ヘッドであって、 記録媒体の記録トラックから漏洩する信号磁界の変化を
抵抗変化に変換する、該記録媒体に対向する前記ヘッド
の先端面から後退して設けられた磁気抵抗効果素子と；
前記磁気抵抗効果素子に接続され、その間に磁気抵抗効
果素子のセンス領域を画成する一対の端子と；一端が前
記ヘッドの先端面に露出し他端が前記磁気抵抗効果素子
の一端に磁気的に結合した、記録媒体からの磁束を前記
磁気抵抗効果素子に案内する前部フラックスガイドと；
前記磁気抵抗効果素子の両側に設けられた、記録トラッ
クの幅方向に平行な第１の磁化方向を有する第１磁性膜
と；前記前部フラックスガイドの両側に設けられた、前
記第１の磁化方向と反対方向の第２の磁化方向を有する
第２磁性膜と；を具備した磁気抵抗効果ヘッド。8. A magnetoresistive effect head for reproducing information recorded on a recording medium, the head facing the recording medium, which converts a change in a signal magnetic field leaking from a recording track of the recording medium into a resistance change. A magnetoresistive effect element provided so as to recede from the front end surface of;
A pair of terminals that are connected to the magnetoresistive effect element and define a sense region of the magnetoresistive effect element therebetween; one end is exposed at the tip surface of the head and the other end is magnetically connected to one end of the magnetoresistive effect element. A front flux guide, which is coupled to the front flux guide for guiding the magnetic flux from the recording medium to the magnetoresistive effect element;
A first magnetic film provided on both sides of the magnetoresistive effect element and having a first magnetization direction parallel to the width direction of the recording track; and a first magnetization provided on both sides of the front flux guide. A second magnetic film having a second magnetization direction opposite to the direction, and a magnetoresistance effect head.
に異なる硬磁性膜から構成される請求項８記載の磁気抵
抗効果ヘッド。9. The magnetoresistive head according to claim 8, wherein the first and second magnetic films are hard magnetic films having different coercive forces.
積層されており、前記第２磁性膜は第２Ｃｒ下地膜上に
積層されており、該第１及び第２Ｃｒ下地膜の膜厚を変
化させることによって前記第１及び第２磁性膜の保磁力
の大きさを異ならせた請求項９記載の磁気抵抗効果ヘッ
ド。10. The first magnetic film is laminated on a first Cr underlayer film, the second magnetic film is laminated on a second Cr underlayer film, and the film thicknesses of the first and second Cr underlayer films are formed. 10. The magnetoresistive head according to claim 9, wherein the magnitudes of the coercive forces of the first and second magnetic films are made different by changing the value.
ａ及びＣｏＣｒＰｔのいずれか一方から構成される請求
項９記載の磁気抵抗効果ヘッド。11. The first and second magnetic films are CoCrT.
The magnetoresistive head according to claim 9, wherein the magnetoresistive effect head is composed of either a or CoCrPt.
磁気的に結合した後部フラックスガイドと、該後部フラ
ックスガイドの両側に設けられた、前記第１の磁化方向
と反対方向の第２の磁化方向を有する第３磁性膜とを更
に具備した請求項８記載の磁気抵抗効果ヘッド。12. A rear flux guide, one end of which is magnetically coupled to the other end of the magnetoresistive element, and second flux guides, which are provided on both sides of the rear flux guide and are opposite to the first magnetization direction. The magnetoresistive head according to claim 8, further comprising a third magnetic film having a magnetization direction.
磁気抵抗効果ヘッドであって、 記録媒体の記録トラックから漏洩する信号磁界の変化を
抵抗変化に変換する、該記録媒体に対向する前記ヘッド
の先端面から後退して設けられた磁気抵抗効果素子と；
前記磁気抵抗効果素子に接続され、その間に磁気抵抗効
果素子のセンス領域を画成する一対の端子と；一端が前
記ヘッドの先端面に露出し他端が前記磁気抵抗効果素子
の一端に磁気的に結合した、記録媒体からの磁束を前記
磁気抵抗効果素子に案内する前部フラックスガイドと；
前記磁気抵抗効果素子の中央部分を除いてその両側部分
上に積層された、記録トラックの幅方向に平行な第１の
磁化方向を有する硬磁性膜と；前記前部フラックスガイ
ドの両側に設けられた、前記第１の磁化方向と反対方向
の第２磁化方向を有する反強磁性膜とを具備した磁気抵
抗効果ヘッド。13. A magnetoresistive effect head for reproducing information recorded on a recording medium, said head being opposed to said recording medium for converting a change of a signal magnetic field leaking from a recording track of said recording medium into a resistance change. A magnetoresistive effect element provided so as to recede from the front end surface of;
A pair of terminals that are connected to the magnetoresistive effect element and define a sense region of the magnetoresistive effect element therebetween; one end is exposed at the tip surface of the head and the other end is magnetically connected to one end of the magnetoresistive effect element. A front flux guide, which is coupled to the front flux guide for guiding the magnetic flux from the recording medium to the magnetoresistive effect element;
Hard magnetic films having a first magnetization direction parallel to the width direction of the recording track, which are laminated on both side portions of the magnetoresistive effect element except for the central portion; and provided on both sides of the front flux guide. A magnetoresistive head having an antiferromagnetic film having a second magnetization direction opposite to the first magnetization direction.
のいずれか一方から構成される請求項１３記載の磁気抵
抗効果ヘッド。14. The antiferromagnetic film is FeMn and NiO.
14. The magnetoresistive head according to claim 13, wherein the magnetoresistive effect head is composed of any one of the above.
磁気抵抗効果ヘッドであって、 記録媒体の記録トラックから漏洩する信号磁界の変化を
抵抗変化に変換する、該記録媒体に対向する前記ヘッド
の先端面から後退して設けられた磁気抵抗効果素子と；
前記磁気抵抗効果素子に接続され、その間に磁気抵抗効
果素子のセンス領域を画成する一対の端子と；一端が前
記ヘッドの先端面に露出し他端が前記磁気抵抗効果素子
の一端に磁気的に結合した、記録媒体からの磁束を前記
磁気抵抗効果素子に案内する前部フラックスガイドと；
前記磁気抵抗効果素子の両側に設けられた、記録トラッ
クの幅方向に平行な第１の磁化方向を有する硬磁性膜
と；前記前部フラックスガイドの中央部分を除いてその
両側部分上に積層された、前記第１の磁化方向と反対方
向の第２の磁化方向を有する反強磁性膜とを具備した磁
気抵抗効果ヘッド。15. A magnetoresistive effect head for reproducing information recorded on a recording medium, said head being opposed to said recording medium for converting a change of a signal magnetic field leaking from a recording track of said recording medium into a resistance change. A magnetoresistive effect element provided so as to recede from the front end surface of;
A pair of terminals that are connected to the magnetoresistive effect element and define a sense region of the magnetoresistive effect element therebetween; one end is exposed at the tip surface of the head and the other end is magnetically connected to one end of the magnetoresistive effect element. A front flux guide, which is coupled to the front flux guide for guiding the magnetic flux from the recording medium to the magnetoresistive effect element;
Hard magnetic films provided on both sides of the magnetoresistive effect element and having a first magnetization direction parallel to the width direction of the recording track; laminated on both side portions of the front flux guide except the central portion thereof A magnetoresistive head having an antiferromagnetic film having a second magnetization direction opposite to the first magnetization direction.
のいずれか一方から構成される請求項１５記載の磁気抵
抗効果ヘッド。16. The antiferromagnetic film is FeMn and NiO.
16. The magnetoresistive effect head according to claim 15, wherein the magnetoresistive effect head is composed of one of the following.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30905194A JP3565925B2 (en) | 1994-12-13 | 1994-12-13 | Magnetoresistive head |
| US08/791,015 US5995339A (en) | 1993-03-18 | 1997-01-27 | Magnetoresistive head with a front flux guide and an embedded MR element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30905194A JP3565925B2 (en) | 1994-12-13 | 1994-12-13 | Magnetoresistive head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08167118A true JPH08167118A (en) | 1996-06-25 |
| JP3565925B2 JP3565925B2 (en) | 2004-09-15 |
Family
ID=17988286
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30905194A Expired - Fee Related JP3565925B2 (en) | 1993-03-18 | 1994-12-13 | Magnetoresistive head |
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| Country | Link |
|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6636391B2 (en) | 2000-04-06 | 2003-10-21 | Hitachi, Ltd. | Magnetoresistive sensor, magnetic head and magnetic disk apparatus |
-
1994
- 1994-12-13 JP JP30905194A patent/JP3565925B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6636391B2 (en) | 2000-04-06 | 2003-10-21 | Hitachi, Ltd. | Magnetoresistive sensor, magnetic head and magnetic disk apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3565925B2 (en) | 2004-09-15 |
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