JPS58115612A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain a magnetic head which has high magnetic permeability even during high-speed magnetism inversion by using a magnetic material which has high specific resistance. CONSTITUTION:The magnetic head consisting of a magnetic film uses a material having high specific resistance. When a material 21 having high specific resistance end high magnetic permeability is use, no eddy current it generated in a specific external magnetic field, so internal magnetic flux density 23 is as shown in a figure. When the external magnetic field 22 increases with time, an eddy current is hardly generated because the magnetic material has high specific resistance, so internal magnetic flux density 25 is greater than internal magnetic flux density 15 as shown in a figure eventually. Practically, sputtered films of ferrite which is a magnetic material with high specific resistance, MnZu-ferrite, NiZn-ferrite, etc., are usable.

Description

【発明の詳細な説明】 本発明は磁気ヘッドに関する。[Detailed description of the invention] The present invention relates to a magnetic head.

今までの磁気ヘッド材料は、パーマロイを主とする高透
磁率材が一般的であつ友。％　Ｋ　％透磁率をより高く
するため多種原素全添加したＯｕ−ＭＯ−パーマロイと
かスーパーマロイ等は、そのよい例であろう、しかし、
現在用いているような高速磁化反虻領域においては、低
比抵抗パー１０イ材ｔ−用いている限り、その使用限界
は明らかである。即ち、低比抵抗材であると磁化反転周
波数が高くなるにつれ、透磁率が低下し、磁気ヘッドと
しての本来の性能會示さなくなる。Until now, magnetic head materials have generally been made of high magnetic permeability materials, mainly permalloy. % K % Ou-MO-permalloy and supermalloy, which are all added with various elements to increase the magnetic permeability, are good examples. However,
In the high-speed magnetization repulsion region currently used, as long as a low resistivity Par-10 material is used, its usage limit is clear. That is, if the material is a low resistivity material, as the magnetization reversal frequency increases, the magnetic permeability decreases, and the original performance as a magnetic head is no longer achieved.

本発明はかかる欠点會除去したものでその目的に、高速
磁化反転において４透磁率が高い磁気ヘッドを提供する
ことである。The present invention eliminates such drawbacks and has as its object the provision of a magnetic head with high magnetic permeability in high-speed magnetization reversal.

この発明は比抵抗が高い磁性体音用いることによって上
記目的を達成した吃のである。This invention achieves the above object by using a magnetic material having high specific resistance.

以下、本発明を従来例と比較しながら図面を参照にして
具体的に説明する。Hereinafter, the present invention will be specifically explained with reference to the drawings while comparing it with a conventional example.

第１図は、従来用いられていた低比抵抗高透−材１１の
場合である。まず、外部磁界１２が一定　　　□の場合
、磁性体内部に生じる内部磁束密［１Ｍは図に示した大
きさであるとする。次に、外ｓｌＩ界１２が高速で反転
した時、簡単の九め、外部−界１２が時間的に増加しつ
つあるとすると、磁性体は、低比抵抗のため外部磁界１
２の導入を妨げる工うＫうず電流１４が発生し、この時
の磁性体内部に生じる内部磁束密度１５は、図に示し九
大魯さとなる。一方、第２図は、本発明の高比抵抗高透
磁率材２１の場合である。一定性ａＳ場に対しては、う
ず電流は生じない度め、第１図と−じ〈内部磁束密度２
５は図に示した大きさである。外Ｗ磁界２２が時間的に
増加し九時、磁性体が高比抵抗のためうず電流は、発生
し難く、結局内部磁束密度２５は図に示した様に第１図
の内部磁束密１［Ｉ　ＳＫ比べて大きくなる。FIG. 1 shows the case of a conventionally used low resistivity and high transparency material 11. First, when the external magnetic field 12 is constant □, it is assumed that the internal magnetic flux density [1M] generated inside the magnetic body is the magnitude shown in the figure. Next, when the external slI field 12 is reversed at a high speed, if we assume that the external slI field 12 is increasing over time, the magnetic material has a low resistivity, so the external magnetic field 12
An eddy current 14 is generated that prevents the introduction of 2, and the internal magnetic flux density 15 generated inside the magnetic body at this time is 90% as shown in the figure. On the other hand, FIG. 2 shows the case of the high specific resistance, high magnetic permeability material 21 of the present invention. For a constant aS field, as long as no eddy currents occur, the internal magnetic flux density 2
5 is the size shown in the figure. When the external W magnetic field 22 increases over time, eddy currents are difficult to generate due to the high specific resistance of the magnetic material, and as a result, the internal magnetic flux density 25 becomes the internal magnetic flux density 1 [ of FIG. 1] as shown in the figure. It is larger than ISK.

以下具体的材質例と実施例を述べる。Specific material examples and examples will be described below.

０　材質例 Ｏ高比抵抗磁性材であるフェライトのスパッタ膜 ＭｎＺｕ−フェライトのスパッタ膜 ＮｉＺｎ−フェライトのスパッタ膜 ０　高比抵抗磁性材であるアモルファス膜ＣｏＺｒ系ア
モルファス膜 ０ｏＦｅＢ系アモルファス膜 シミ８１系アモルファス襖 ｏ　ｖＩ施例１ 垂直−化紀録万式用補助磁極一主磁極型対向ヘッドにお
いて、主Ｓ極が本発明高比抵抗高透磁率績で形成する。0 Material example O Sputtered film of ferrite, which is a high resistivity magnetic material MnZu - Sputtered film of ferrite NiZn - Sputtered film of ferrite 0 Amorphous film, which is a high resistivity magnetic material CoZr-based amorphous film 0o FeB-based amorphous film Stain 81-based amorphous sliding door o vI Example 1 In a vertical-type auxiliary magnetic pole-main magnetic pole type opposed head, the main S pole is formed of the high resistivity and high magnetic permeability material of the present invention.

第５図にこの実施例を示す、ｓ１昧補助ｍ極、５２は垂
直缶化記録媒体、５５は、本発明高比抵抗磁性膜からな
る主磁極０本実施例ＫＬれば、高周波領域における貴生
感度が上昇した。This embodiment is shown in FIG. Sensitivity increased.

０　実施例２ 磁気配置媒体の再生用磁気ヘッドとしてコイルによる再
生より感変の高い磁気抵抗素子というものがあるが、従
来の様にパーマロイからなる１ｉｉｉｔ抵抗素子では抵
抗が小さくＩＩｔ数百オンダストロームに薄くしなけれ
ば所定の抵抗変化が得られ看かった。本発明磁気ヘッド
ｔＳ気抵抗素子に用いた例を第４図に示す、４１は磁気
配録媒体、４２は磁気抵抗素子に電流ｔ−流す電極、４
２は本発明による高比抵抗磁気抵抗素子である０本実施
例では、磁気抵抗素子の比抵抗が高い分だけ素子の襲厚
も厚くとれ、磁気抵抗素子内部に導入される一束流が増
え、再生出力もパーマロイ管用いたａｍ抵抗素子に較べ
一桁以上上昇した。0 Example 2 As a magnetic head for reproducing magnetically arranged media, there is a magnetoresistive element that has higher sensitivity than that of a coil, but the conventional 1IIIt resistance element made of permalloy has a small resistance of several hundred angstroms. I was able to obtain the desired resistance change without making it thinner. An example of use in the magnetic head tS magneto-resistive element of the present invention is shown in FIG.
2 is a high resistivity magnetoresistive element according to the present invention.0 In this embodiment, the thickness of the element can be increased to the extent that the resistivity of the magnetoresistive element is high, and the flux of flux introduced into the inside of the magnetoresistive element is increased. The reproduction output was also increased by more than an order of magnitude compared to an am resistance element using a permalloy tube.

また１、パーマロイの様な金属を用い次場合に較べ抵抗
温度係数が減少する几め熱雑音の影響【受けＫ（＜なり
％　Ｓ　／　Ｎ比が向上した。In addition, 1. By using a metal such as permalloy, the temperature coefficient of resistance is reduced compared to the following case, and the effect of thermal noise is reduced.

０　実施例＆ 本発明高比抵抗材をリングタイプ薄膜磁気ヘッドに使つ
九例會第５図に示す。５１はコイル、５２は本発明の高
比抵抗磁性材いｆｌ−磁極である。0 Examples & Nine examples of using the high resistivity material of the present invention in a ring type thin film magnetic head are shown in FIG. 51 is a coil, and 52 is a high resistivity magnetic material fl-magnetic pole of the present invention.

従来の低比抵抗磁性体管用いた磁極では、コイルとの間
に１１３ｍ体をもうける必要があったカニ、本発明によ
れば、コイルのＩ［後形成が可能になった。With conventional magnetic poles using low resistivity magnetic tubes, it was necessary to provide a 113 m body between the coil and the coil.According to the present invention, it is now possible to form the coil later.

以上の様に本発明によると、磁極の高周波透磁率が低下
しな％／ｈため、高周波配置再生感度が上昇する。ｉ１
１気抵抗素子に応用した場合の利点力；多い、比抵抗が
高いため絶昏体とみなしてよく、コイルを直接形成して
もシト→しない埠の長所を有し皮理想的な磁気ヘッドを
提供するものである。As described above, according to the present invention, the high frequency magnetic permeability of the magnetic pole does not decrease by %/h, so the high frequency arrangement reproduction sensitivity increases. i1
1. Advantages when applied to resistance elements; Due to its high specific resistance, it can be regarded as a dead body, and it has the advantage of not falling even if the coil is directly formed, making it an ideal magnetic head. This is what we provide.

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

第１ｒｇＪは、従来用込られていたＩ（−マロイ等の低
比抵抗磁性体Ｋ１１ｌ界が導入される様子を示した図、
第２図は、本発明高比抵抗磁性体に磁界力算導入する様
子を示しｔ図、第Ｓ図は、本発明磁気ヘッドｆ−直磁化
装置用主磁極に用いた図、第４図は、本発明磁気ヘッド
管再生用磁気抵抗素子ＫＪｌｓい次回、第５図は、本発
明磁気ヘッドを、薄−リング形磁気ヘッド磁極に用いた
図である。 １１・・・、低比抵抗高透磁率材 １２・・・外部磁界 １５・・・外部磁界が一定であるときの磁性体内部磁束
密度 １４・・・うず電流 １５・・・外部磁界が時間的に変化すると−の礎性体内
Ｎａ束密度 ２１・・・高比抵抗高透磁率材 ２２・・・外部磁界 ２３・・・外部磁界が一定であるときの磁性体内部磁束
密度 ２４・・・うず電流 ２５・・・外部磁界が時間的に変化するときの磁性体内
部磁束密度 ｓｌ・・・補助磁極 ５２・・・垂直磁化装置媒体 ３５・・・高比抵抗主Ｓ他 ４１・・・磁気配置媒体 ４２・・・電極 ４３・・・高比抵抗磁気抵抗素子 ５１・・・コイル ５２・・・高比抵抗磁極 以上 出願人　株式会社　−訪精工舎 代理人　弁理士　鐘　上　　務The first rgJ is a diagram showing how a conventionally used I(-Malloy or other low resistivity magnetic material K11l field is introduced).
Fig. 2 shows how the magnetic field force is calculated into the high resistivity magnetic material of the present invention. FIG. 5 is a diagram in which the magnetic head of the present invention is used in a thin ring type magnetic head pole. 11...Low resistivity high permeability material 12...External magnetic field 15...Magnetic body internal magnetic flux density when the external magnetic field is constant 14...Eddy current 15...External magnetic field changes over time When changing to - Na flux density inside the basic body 21... High resistivity high permeability material 22... External magnetic field 23... Magnetic flux density inside the magnetic body when the external magnetic field is constant 24... Eddy Current 25...Magnetic body internal magnetic flux density sl when the external magnetic field changes over time...Auxiliary magnetic pole 52...Perpendicular magnetization device medium 35...High resistivity main S and others 41...Magnetic arrangement Medium 42...Electrode 43...High resistivity magnetoresistive element 51...Coil 52...High resistivity magnetic pole or higher Applicant: Hansei Kosha Co., Ltd. Agent Patent attorney Kane Jomu

Claims (1)

【特許請求の範囲】[Claims] 磁性−からなるｓ）気ヘッドにおいて、高比抵抗材質か
らなることｔ−特徴とする磁気ヘッド。A magnetic head characterized in that it is made of a high resistivity material.