JP2004227709A - Magnetic recording head and magnetic recorder using the head - Google Patents

Magnetic recording head and magnetic recorder using the head Download PDF

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Publication number
JP2004227709A
JP2004227709A JP2003016299A JP2003016299A JP2004227709A JP 2004227709 A JP2004227709 A JP 2004227709A JP 2003016299 A JP2003016299 A JP 2003016299A JP 2003016299 A JP2003016299 A JP 2003016299A JP 2004227709 A JP2004227709 A JP 2004227709A
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Japan
Prior art keywords
magnetic
recording
medium
recording head
head
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JP2003016299A
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Japanese (ja)
Inventor
Hidekazu Miyashita
英一 宮下
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Japan Broadcasting Corp
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Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
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Priority to JP2003016299A priority Critical patent/JP2004227709A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic recording head of a perpendicular magnetic recording system, which can increase the recording speed and to provide a magnetic recorder using this magnetic recording head. <P>SOLUTION: The head is provided with recording magnetic poles 110 which generate magnetization on a prescribed recording medium 200 by concentrating the magnetic flux, the energizing conductors 130 which energize the poles 110 with magnetic flux and the return yokes 120 which are connected to the poles 110 to form a magnetic circuit with the poles 110 and the medium 200. An ABS end 112 of the poles 110 which is a portion opposing the medium 200 is tilted with respect to the portion 113 other than the ABS end 112 of the poles 110. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、コンピュータ等の情報機器において情報を磁気的に記録するための磁気記録ヘッド及びそれを用いた磁気記録装置に関する。
【0002】
【従来の技術】
磁気記録装置においては、磁気記録ヘッドを用いて記録媒体上に情報を書き込む。近年、より多くの情報を記録するための高記録密度化の要請が高まり、所謂、垂直磁気記録方式が採用されつつある。これは、従来の面内磁気記録方式で高密度化を進めた場合に、記録媒体上の磁化の熱揺らぎに起因して情報の劣化が生じ易いため、記録媒体の面内に磁化の方向を向けず面に垂直な方向に向けて記録するようにしたものである。
【0003】
そして、垂直磁気記録用の記録ヘッド(以下、単に「垂直磁気記録ヘッド」という。)として、所謂、単磁気記録ヘッドが研究されている(例えば、特許文献1、特許文献2、非特許文献1参照。)。この単磁気記録ヘッドは、記録媒体面に垂直な方向に磁界を発生することを目的としているため、磁極の中心線がABS(Air Bearing Surface)面に対して垂直となるような構造をしている。
【0004】
一方、高記録密度化と共に、高速で磁気記録(以下、単に「超高速書込み」という。)ができることも求められる。そのためには、記録速度が速まるにつれてそれまで問題視されなかった磁化反転に要する時間を短縮する必要がある。この点、従来の斜め磁界を印加して磁気記録する技術は、単磁気記録ヘッドを用いて磁気記録する技術よりも有利であった。
【0005】
【特許文献1】
実開平06−84508号公報
【特許文献2】
特開2001−250204号公報
【非特許文献1】
ウェイシン シャ、外2名、「磁極構造を改良した、高磁界勾配単磁気記録ヘッド」、アイイーイーイー、トランザクションズ オン マグネティックス、2002年9月、38巻、5号、p.2216−2218(Weixing Xia,Hiroaki Muraoka,and YoshihisaNakamura)
【0006】
【発明が解決しようとする課題】
しかし、このような従来の磁気記録ヘッドでは、記録媒体に垂直な方向を向いた磁界を用いて磁気記録を行うため、磁化反転速度が斜め磁界を印加して磁気記録するものに比べて遅く、超高速書込みを実現するという点で問題もあった。
【0007】
本発明はこのような問題を解決するためになされたもので、垂直磁気記録方式を用いた磁気記録ヘッドの磁気記録速度を向上することが可能な磁気記録ヘッドおよびそれを用いた磁気記録装置を提供するものである。
【0008】
【課題を解決するための手段】
以上の点を考慮して、請求項1に係る発明は、所定の記録媒体上に磁束を集中させて磁化を生成する記録磁極と、前記記録磁極に磁束を励磁する励磁導線と、前記記録磁極に接続され、前記記録磁極および前記記録媒体と共に磁路を形成するリターンヨークとを備え、前記記録磁極の前記記録媒体に対向する部分であるABS端が前記記録磁極のABS端以外の部分から傾いている構成を有している。
この構成により、記録磁極の記録媒体に対向する部分を傾けることによって、記録媒体に入射する磁界の長手方向成分が増大するようになったため、垂直磁気記録方式を用いた磁気記録ヘッドについても磁化反転を容易にし、磁気記録速度を向上することが可能な磁気記録ヘッドを実現することができる。
【0009】
また、請求項2に係る発明は、請求項1において、前記記録磁極のABS端が前記記録磁極のABS端以外の部分に対して、10度から50度のいずれかの角度、又は−10度から−70度のいずれかの角度で傾いている構成を有している。
この構成により、記録磁極の記録媒体に対向する部分を、10度から50度のいずれかの角度、又は−10度から−70度のいずれかの角度傾けることにしたため、垂直磁気記録方式を用いた磁気記録ヘッドについても磁化反転をより容易にし、磁気記録速度をさらに向上することが可能な磁気記録ヘッドを実現することができる。
【0010】
また、請求項3に係る発明は、請求項1又は請求項2に記載の磁気記録ヘッドを用いた装置構成を有する。
この構成により、記録磁極の記録媒体に対向する部分を傾けることによって、記録媒体に入射する磁界の長手方向成分が増大するようになったため、垂直磁気記録方式を用いた磁気記録ヘッドについても磁化反転を容易にし、磁気記録速度を向上することが可能な磁気記録ヘッドを用いた磁気記録装置を実現することができる。
【0011】
【発明の実施の形態】
以下、本発明の実施の形態について、図面を用いて説明する。
図1は、本発明の磁気記録ヘッドの概略構成を示す概念図である。図1において、磁気記録ヘッド100は、記録媒体200上の狭い領域を磁化するための記録磁極110、記録磁極110と結合されて「コ」の字型の磁路を形成するリターンヨーク120、および記録磁極110を励磁する信号を導通させるための励磁導線130を含むように構成される。
【0012】
以下では、記録媒体200としてハードディスク等に用いられるディスク状の記録媒体を取り上げて本発明の実施の形態を説明し、その記録媒体には所謂トラックが設けられているものとする。また、図1に示すように、記録媒体200は、情報を磁気記録するための媒体記録層210、および媒体軟磁性層と下地層からなる軟磁性下地層220からなるものとする。
【0013】
ここで、記録磁極110は、記録位置で記録媒体200に対向する面である記録ヘッドABS(Air Bearing Surface)面111を有し、この記録ヘッドABS面近傍の部分(以下、単に「ABS端」という。)112は、記録磁極110の他の部分(以下、単に「励磁部」という。)113と斜めに接続されている。そして、図1または図2に示すように、ABS端112は、ABS端112を通過する磁束が記録媒体200の媒体記録層210に対して斜めとなるように構成されている。
【0014】
図2に示すように、記録磁極110のABS端112の傾き角θを定義する。すなわち、励磁部113となす角を傾き角θとして定義するものである。磁気記録ヘッド100の励磁部113は、概ね記録媒体200の媒体記録層210に垂直となるように配置されるため、ABS端112は、媒体記録層210に垂直の方向から略θだけ傾いて対向することになる。また、傾き角θの符号も図2に示すものによる。すなわち、図2(a)に示す方向の傾き角が正の傾き角と定義され、図2(b)に示す方向の傾き角が負の傾き角と定義される。
【0015】
図3は、本発明の磁気記録ヘッド100を用いたときの媒体記録層210上の磁界分布の一例を示す図である。図3(a)は、正の傾き角θを所定の角度に固定して磁気記録ヘッドがトラック上に磁界を印加した場合に、トラック幅中心における媒体記録層の中心位置で発生する磁界の垂直成分分布を示す図である。図3(a)において、破線は傾き角θが0度、実線は傾き角θが20度、一点鎖線は傾き角θが40度、および点線は傾き角θが60度のときの磁界分布を示す曲線である。
【0016】
ここで、磁気記録ヘッド100については、記録磁極110の幅が0.2μm、記録磁極110の厚さが0.2μm、記録磁極110の飽和磁束密度が2Tとし、記録媒体200については、上記の媒体軟磁性層の厚さが200nm、媒体軟磁性層の飽和磁束密度が1Tとし、記録磁極110と媒体軟磁性層との間の距離が50nmとし、励磁導線130の起磁力が0.5ATとした。
【0017】
図3(a)に示す磁界の垂直成分分布の結果から、傾き角θが20から60度の範囲では、傾き角θを変化させても垂直方向の磁界強度を大きく損なうことがないことが示される。これは、傾き角θが0度のときの曲線(図3(a)における破線の曲線)と他の傾き角θのときの曲線を比較することにより明らかである。これにより記録磁界を保持することが可能である。
【0018】
同様に、図3(b)は、正の傾き角θを所定の角度に固定して磁気記録ヘッドがトラック上に磁界を印加した場合に、トラック幅中心における媒体記録層の中心位置で発生する磁界の長手方向成分の分布を示す図である。図3(b)において、破線は傾き角θが0度、実線は傾き角θが20度、一点鎖線は傾き角θが40度、および点線は傾き角θが60度のときの磁界分布を示す曲線である。
【0019】
図3(b)に示す磁界の長手方向成分分布の結果から、傾き角θが20から60度の範囲で、従来の垂直磁気記録方式の磁気記録ヘッドに比して強い長手方向成分の磁界が発生していることが示される。図3(a)に示す結果と合わせて、ABS端112を所定角度傾けることによって垂直方向の磁界強度を大きく損なうことなく、長手方向成分の磁界強度を大きくできることが示された。
【0020】
図4は、本発明の磁気記録ヘッド100を用いたときの媒体記録層210上の最大磁界の一例を示す図である。具体的には、負の傾き角−θを所定の角度に固定して磁気記録ヘッドがトラック上に磁界を印加した場合に、トラック幅中心における媒体記録層の中心位置で発生する磁界の垂直成分の最大値を示す図である。
【0021】
ここで、磁気記録ヘッド100については、記録磁極110の幅が0.2μm、記録磁極110の厚さが0.2μm、記録磁極110の飽和磁束密度が2Tとし、記録媒体200については、上記の媒体軟磁性層の厚さが200nm、媒体軟磁性層の飽和磁束密度が1Tとし、記録磁極110と媒体軟磁性層との間の距離が50nmとし、励磁導線130の起磁力が1.5ATとした。
【0022】
ここで、傾き角θが0でないABS端112を有する記録磁極110が発生する垂直磁界は、傾き角θが0の場合に比して、磁界強度がトレーリング側で大きくなるという結果が得られている。ここで、トレーリング側とは、図1に示すトレーリングエッジ114の近傍をいうものとする。
【0023】
以下に、本発明の磁気記録ヘッド100を用いた磁気記録の動作について説明する。説明の都合上、磁気記録ヘッド100は、予め記録媒体200上の記録位置に位置しているものとする。
【0024】
まず、励磁導線130に外部から記録する情報に応じた電流(以下、単に「信号電流」という。)が流され、信号電流の向きに応じて励磁する記録磁極110の磁気的極性が決定される。ここで、電流の強度は、記録磁界強度を確保できる強さになっているものとする。次に、励磁導線130を流れる信号電流によって記録磁極110が励磁されるとほぼ同時に、記録ヘッドABS面111近傍の媒体記録層210が斜めに入射する磁界によって磁化される。
【0025】
同時に、記録ヘッドABS面111近傍の媒体記録層210を磁化した磁場の磁力線は、軟磁性下地層220、リターンヨーク120を磁路として記録磁極110において閉じる。以上の動作が繰り返され、各信号電流に応じて磁気記録がなされる。
なお、言うまでもなく、本発明の磁気記録ヘッドを公知の磁気記録装置の磁気記録ヘッドとして用い、高記録密度化が可能な磁気記録装置を実現するのでもよい。ここで、磁気記録ヘッドを用いた磁気記録装置の構成や動作は、公知であるため、その説明を省略する。
【0026】
以上説明したように、本発明の磁気記録ヘッドおよびそれを用いた磁気記録装置は、記録磁極の記録媒体に対向する部分を傾けて、記録媒体に入射する磁界の長手方向成分が増大するようになったため、垂直磁気記録方式を用いた磁気記録ヘッドについても磁化反転を容易にし、磁気記録速度を向上することができる。
【0027】
なお、図5及び図6に示すように記録磁極110全体又は記録磁極110全体とリターンヨーク120とを一体として記録媒体200に対して傾けた場合でも上記と同様の効果を得ることができる。
【0028】
【発明の効果】
以上説明したように、本発明は、垂直磁気記録方式を用いた磁気記録ヘッドの磁気記録速度を向上することが可能な磁気記録ヘッドおよびそれを用いた磁気記録装置を実現することができる。
【図面の簡単な説明】
【図1】本発明の磁気記録ヘッドの概略構成を示す概念図である。
【図2】本発明の磁気記録ヘッドにおけるABS端の傾き角θを説明するための図である。
【図3】本発明の磁気記録ヘッドを用いたときの媒体記録層上の磁界分布の一例を示す図である。
【図4】本発明の磁気記録ヘッドを用いたときの媒体記録層上の最大磁界の一例を示す図である。
【図5】磁気記録ヘッドの磁極部分全体をABS面に対し傾けた構造の一例を示す図である。
【図6】磁気記録ヘッドの全体をABS面に対し傾けた構造の一例を示す図である。
【符号の説明】
100 磁気記録ヘッド
110 記録磁極
111 記録ヘッドABS面
112 ABS端
113 励磁部
114 トレーリングエッジ
120 リターンヨーク
130 励磁導線
200 記録媒体
210 媒体記録層
220 軟磁性下地層
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a magnetic recording head for magnetically recording information in an information device such as a computer, and a magnetic recording device using the same.
[0002]
[Prior art]
In a magnetic recording device, information is written on a recording medium using a magnetic recording head. In recent years, demands for higher recording density for recording more information have been increasing, and a so-called perpendicular magnetic recording system has been adopted. This is because, when the density is increased by the conventional longitudinal magnetic recording method, the information tends to deteriorate due to the thermal fluctuation of the magnetization on the recording medium. The recording is performed in a direction perpendicular to the surface without turning.
[0003]
As a recording head for perpendicular magnetic recording (hereinafter, simply referred to as “perpendicular magnetic recording head”), a so-called single magnetic recording head has been studied (for example, Patent Document 1, Patent Document 2, Non-Patent Document 1). reference.). Since this single magnetic recording head aims at generating a magnetic field in a direction perpendicular to the recording medium surface, the single magnetic recording head has a structure in which the center line of the magnetic pole is perpendicular to the ABS (Air Bearing Surface) plane. I have.
[0004]
On the other hand, as the recording density increases, it is also required that magnetic recording can be performed at a high speed (hereinafter, simply referred to as “ultra high speed writing”). For that purpose, as the recording speed increases, it is necessary to reduce the time required for the magnetization reversal, which has not been regarded as a problem until then. In this regard, the conventional technique of performing magnetic recording by applying an oblique magnetic field is more advantageous than the technique of performing magnetic recording using a single magnetic recording head.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 06-84508 [Patent Document 2]
JP 2001-250204 A [Non-Patent Document 1]
Weishinsha, et al., "High magnetic field gradient single magnetic recording head with improved magnetic pole structure," IEE, Transactions on Magnetics, September 2002, Vol. 38, No. 5, p. 2216-2218 (Weixing Xia, Hiroaki Muroka, and Yoshishiisa Nakamura)
[0006]
[Problems to be solved by the invention]
However, in such a conventional magnetic recording head, since magnetic recording is performed using a magnetic field oriented in a direction perpendicular to the recording medium, the magnetization reversal speed is lower than that in the case of applying an oblique magnetic field and performing magnetic recording. There was also a problem in realizing ultra-high speed writing.
[0007]
The present invention has been made in order to solve such a problem, and it is an object of the present invention to provide a magnetic recording head capable of improving the magnetic recording speed of a magnetic recording head using a perpendicular magnetic recording method and a magnetic recording device using the same. To provide.
[0008]
[Means for Solving the Problems]
In view of the above points, the invention according to claim 1 provides a recording magnetic pole that generates magnetization by concentrating a magnetic flux on a predetermined recording medium, an exciting conductive wire that excites the magnetic flux to the recording magnetic pole, and the recording magnetic pole. And a return yoke that forms a magnetic path together with the recording magnetic pole and the recording medium, wherein an ABS end of the recording magnetic pole facing the recording medium is inclined from a part other than the ABS end of the recording magnetic pole. Configuration.
With this configuration, the longitudinal component of the magnetic field incident on the recording medium is increased by tilting the portion of the recording magnetic pole facing the recording medium, so that the magnetization reversal of the magnetic recording head using the perpendicular magnetic recording method is also performed. And a magnetic recording head capable of improving the magnetic recording speed can be realized.
[0009]
The invention according to claim 2 is the invention according to claim 1, wherein the ABS end of the recording magnetic pole is at any angle from 10 degrees to 50 degrees or -10 degrees with respect to a portion other than the ABS end of the recording magnetic pole. And -70 degrees.
According to this configuration, the portion of the recording magnetic pole facing the recording medium is inclined at any angle from 10 degrees to 50 degrees or any angle from -10 degrees to -70 degrees. Also, it is possible to realize a magnetic recording head in which magnetization reversal can be made easier and the magnetic recording speed can be further improved.
[0010]
According to a third aspect of the present invention, there is provided an apparatus configuration using the magnetic recording head according to the first or second aspect.
With this configuration, the longitudinal component of the magnetic field incident on the recording medium is increased by tilting the portion of the recording magnetic pole facing the recording medium, so that the magnetization reversal of the magnetic recording head using the perpendicular magnetic recording method is also performed. And a magnetic recording apparatus using a magnetic recording head capable of improving the magnetic recording speed can be realized.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a conceptual diagram showing a schematic configuration of a magnetic recording head of the present invention. In FIG. 1, a magnetic recording head 100 includes a recording magnetic pole 110 for magnetizing a narrow area on a recording medium 200, a return yoke 120 combined with the recording magnetic pole 110 to form a U-shaped magnetic path, and It is configured to include an excitation conductor 130 for conducting a signal for exciting the recording magnetic pole 110.
[0012]
Hereinafter, the embodiment of the present invention will be described by taking a disk-shaped recording medium used for a hard disk or the like as the recording medium 200, and it is assumed that the recording medium has a so-called track. As shown in FIG. 1, the recording medium 200 includes a medium recording layer 210 for magnetically recording information and a soft magnetic underlayer 220 including a medium soft magnetic layer and an underlayer.
[0013]
Here, the recording magnetic pole 110 has a recording head ABS (Air Bearing Surface) surface 111 which is a surface facing the recording medium 200 at a recording position, and a portion near the recording head ABS surface (hereinafter simply referred to as “ABS end”). ) 112 is obliquely connected to another portion (hereinafter, simply referred to as “exciting portion”) 113 of the recording magnetic pole 110. Then, as shown in FIG. 1 or FIG. 2, the ABS end 112 is configured such that the magnetic flux passing through the ABS end 112 is oblique to the medium recording layer 210 of the recording medium 200.
[0014]
As shown in FIG. 2, an inclination angle θ of the ABS end 112 of the recording magnetic pole 110 is defined. That is, the angle formed with the excitation unit 113 is defined as the tilt angle θ. Since the excitation unit 113 of the magnetic recording head 100 is disposed so as to be substantially perpendicular to the medium recording layer 210 of the recording medium 200, the ABS end 112 faces the medium recording layer 210 by being inclined by approximately θ from the direction perpendicular to the medium recording layer 210. Will do. Also, the sign of the inclination angle θ is as shown in FIG. That is, the tilt angle in the direction shown in FIG. 2A is defined as a positive tilt angle, and the tilt angle in the direction shown in FIG. 2B is defined as a negative tilt angle.
[0015]
FIG. 3 is a diagram illustrating an example of a magnetic field distribution on the medium recording layer 210 when the magnetic recording head 100 of the present invention is used. FIG. 3A shows the perpendicularity of the magnetic field generated at the center position of the medium recording layer at the center of the track width when the magnetic recording head applies a magnetic field on the track with the positive tilt angle θ fixed at a predetermined angle. It is a figure showing a component distribution. In FIG. 3A, the broken line indicates the magnetic field distribution when the inclination angle θ is 0 degree, the solid line indicates the inclination angle θ is 20 degrees, the dashed line indicates the magnetic field distribution when the inclination angle θ is 40 degrees, and the dotted line indicates the magnetic field distribution when the inclination angle θ is 60 degrees. FIG.
[0016]
Here, for the magnetic recording head 100, the width of the recording magnetic pole 110 is 0.2 μm, the thickness of the recording magnetic pole 110 is 0.2 μm, the saturation magnetic flux density of the recording magnetic pole 110 is 2T, and the recording medium 200 is as described above. The thickness of the medium soft magnetic layer is 200 nm, the saturation magnetic flux density of the medium soft magnetic layer is 1 T, the distance between the recording magnetic pole 110 and the medium soft magnetic layer is 50 nm, and the magnetomotive force of the exciting lead 130 is 0.5 AT. did.
[0017]
The results of the vertical component distribution of the magnetic field shown in FIG. 3A show that when the inclination angle θ is in the range of 20 to 60 degrees, the magnetic field intensity in the vertical direction is not significantly impaired even if the inclination angle θ is changed. It is. This is evident by comparing the curve when the inclination angle θ is 0 degree (the broken line curve in FIG. 3A) with the curve when the other inclination angle θ is obtained. This makes it possible to maintain the recording magnetic field.
[0018]
Similarly, FIG. 3B shows a case where the magnetic recording head applies a magnetic field on a track with the positive tilt angle θ fixed at a predetermined angle, which is generated at the center position of the medium recording layer at the center of the track width. It is a figure showing distribution of a longitudinal direction component of a magnetic field. In FIG. 3B, the broken line indicates the magnetic field distribution when the inclination angle θ is 0 degree, the solid line indicates the inclination angle θ is 20 degrees, the one-dot chain line indicates the inclination angle θ is 40 degrees, and the dotted line indicates the magnetic field distribution when the inclination angle θ is 60 degrees. FIG.
[0019]
From the result of the distribution of the longitudinal component of the magnetic field shown in FIG. 3B, when the inclination angle θ is in the range of 20 to 60 degrees, the magnetic field of the longitudinal component that is stronger than that of the magnetic recording head of the conventional perpendicular magnetic recording system is large. It is indicated that it has occurred. In addition to the results shown in FIG. 3A, it was shown that by tilting the ABS end 112 by a predetermined angle, the magnetic field strength of the longitudinal component can be increased without significantly impairing the magnetic field strength in the vertical direction.
[0020]
FIG. 4 is a diagram showing an example of the maximum magnetic field on the medium recording layer 210 when the magnetic recording head 100 of the present invention is used. Specifically, when the magnetic recording head applies a magnetic field on the track while fixing the negative tilt angle −θ to a predetermined angle, the perpendicular component of the magnetic field generated at the center position of the medium recording layer at the center of the track width It is a figure which shows the maximum value of.
[0021]
Here, for the magnetic recording head 100, the width of the recording magnetic pole 110 is 0.2 μm, the thickness of the recording magnetic pole 110 is 0.2 μm, the saturation magnetic flux density of the recording magnetic pole 110 is 2T, and the recording medium 200 is as described above. The thickness of the medium soft magnetic layer is 200 nm, the saturation magnetic flux density of the medium soft magnetic layer is 1 T, the distance between the recording magnetic pole 110 and the medium soft magnetic layer is 50 nm, and the magnetomotive force of the exciting conductor 130 is 1.5 AT. did.
[0022]
Here, the perpendicular magnetic field generated by the recording magnetic pole 110 having the ABS end 112 where the inclination angle θ is not 0 has a result that the magnetic field intensity is larger on the trailing side than when the inclination angle θ is 0. ing. Here, the trailing side means the vicinity of the trailing edge 114 shown in FIG.
[0023]
The operation of magnetic recording using the magnetic recording head 100 according to the present invention will be described below. For convenience of explanation, it is assumed that the magnetic recording head 100 is located at a recording position on the recording medium 200 in advance.
[0024]
First, a current (hereinafter, simply referred to as a “signal current”) corresponding to information to be recorded from the outside is applied to the excitation conductor 130, and the magnetic polarity of the recording magnetic pole 110 to be excited is determined according to the direction of the signal current. . Here, it is assumed that the current intensity is high enough to secure the recording magnetic field intensity. Next, almost simultaneously with the excitation of the recording magnetic pole 110 by the signal current flowing through the excitation conducting wire 130, the medium recording layer 210 near the recording head ABS surface 111 is magnetized by the obliquely incident magnetic field.
[0025]
At the same time, the magnetic field lines of the magnetic field magnetizing the medium recording layer 210 near the recording head ABS surface 111 are closed at the recording magnetic pole 110 using the soft magnetic underlayer 220 and the return yoke 120 as magnetic paths. The above operation is repeated, and magnetic recording is performed according to each signal current.
Needless to say, the magnetic recording head of the present invention may be used as a magnetic recording head of a known magnetic recording device to realize a magnetic recording device capable of increasing the recording density. Here, the configuration and operation of a magnetic recording apparatus using a magnetic recording head are known, and thus description thereof is omitted.
[0026]
As described above, the magnetic recording head of the present invention and the magnetic recording apparatus using the same are configured such that the portion of the recording magnetic pole facing the recording medium is inclined so that the longitudinal component of the magnetic field incident on the recording medium increases. Therefore, magnetization reversal can be facilitated even in a magnetic recording head using the perpendicular magnetic recording method, and the magnetic recording speed can be improved.
[0027]
Note that the same effects as described above can be obtained even when the entire recording magnetic pole 110 or the entire recording magnetic pole 110 and the return yoke 120 are inclined with respect to the recording medium 200 as shown in FIGS.
[0028]
【The invention's effect】
As described above, the present invention can realize a magnetic recording head capable of improving the magnetic recording speed of a magnetic recording head using a perpendicular magnetic recording method and a magnetic recording device using the same.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a schematic configuration of a magnetic recording head of the present invention.
FIG. 2 is a diagram for explaining an inclination angle θ of an ABS end in the magnetic recording head of the present invention.
FIG. 3 is a diagram showing an example of a magnetic field distribution on a medium recording layer when the magnetic recording head of the present invention is used.
FIG. 4 is a diagram showing an example of a maximum magnetic field on a medium recording layer when the magnetic recording head of the present invention is used.
FIG. 5 is a diagram showing an example of a structure in which the entire magnetic pole portion of the magnetic recording head is inclined with respect to the ABS.
FIG. 6 is a diagram showing an example of a structure in which the entire magnetic recording head is inclined with respect to the ABS.
[Explanation of symbols]
REFERENCE SIGNS LIST 100 magnetic recording head 110 recording magnetic pole 111 recording head ABS surface 112 ABS end 113 excitation part 114 trailing edge 120 return yoke 130 excitation lead 200 recording medium 210 medium recording layer 220 soft magnetic underlayer

Claims (3)

所定の記録媒体上に磁束を集中させて磁化を生成する記録磁極と、前記記録磁極に磁束を励磁する励磁導線と、前記記録磁極に接続され、前記記録磁極および前記記録媒体と共に磁路を形成するリターンヨークとを備え、前記記録磁極の前記記録媒体に対向する部分であるABS端が前記記録磁極のABS端以外の部分から傾いて構成されることを特徴とする磁気記録ヘッド。A recording magnetic pole that generates magnetization by concentrating a magnetic flux on a predetermined recording medium, an excitation wire that excites the magnetic flux to the recording magnetic pole, and a magnetic path that is connected to the recording magnetic pole and forms a magnetic path together with the recording magnetic pole and the recording medium. And a return yoke, wherein an ABS end of the recording magnetic pole facing the recording medium is inclined from a part other than the ABS end of the recording magnetic pole. 前記記録磁極のABS端が前記記録磁極のABS端以外の部分に対して、10度から50度のいずれかの角度、又は−10度から−70度のいずれかの角度で傾いていることを特徴とする磁気記録ヘッド。The ABS end of the recording magnetic pole is inclined at any angle of 10 to 50 degrees or any angle of -10 to -70 degrees with respect to a portion other than the ABS end of the recording magnetic pole. Characteristic magnetic recording head. 請求項1又は請求項2に記載の磁気記録ヘッドを用いたことを特徴とする磁気記録装置。A magnetic recording apparatus using the magnetic recording head according to claim 1.
JP2003016299A 2003-01-24 2003-01-24 Magnetic recording head and magnetic recorder using the head Pending JP2004227709A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8116031B2 (en) 2009-04-06 2012-02-14 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system with helical write coil and auxiliary coil for fast switching of write pole magnetization
US8116032B2 (en) 2009-04-06 2012-02-14 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system with auxiliary coil and circuitry for fast switching of write pole magnetization
US8139319B2 (en) 2009-02-23 2012-03-20 Hitachi Global Storage Technologies Netherlands B.V Perpendicular magnetic recording system with magnetic precession for fast switching of perpendicular write pole magnetization
US8179633B2 (en) 2009-08-28 2012-05-15 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system and write head with transverse auxiliary pole for fast switching of write pole magnetization
US8351155B2 (en) 2009-08-17 2013-01-08 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system with spin torque oscillator and control circuitry for fast switching of write pole magnetization
US8446690B2 (en) 2009-08-17 2013-05-21 HGST Netherlands B.V. Perpendicular magnetic recording write head with spin torque oscillator for fast switching of write pole magnetization

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8139319B2 (en) 2009-02-23 2012-03-20 Hitachi Global Storage Technologies Netherlands B.V Perpendicular magnetic recording system with magnetic precession for fast switching of perpendicular write pole magnetization
US8116031B2 (en) 2009-04-06 2012-02-14 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system with helical write coil and auxiliary coil for fast switching of write pole magnetization
US8116032B2 (en) 2009-04-06 2012-02-14 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system with auxiliary coil and circuitry for fast switching of write pole magnetization
US8351155B2 (en) 2009-08-17 2013-01-08 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system with spin torque oscillator and control circuitry for fast switching of write pole magnetization
US8446690B2 (en) 2009-08-17 2013-05-21 HGST Netherlands B.V. Perpendicular magnetic recording write head with spin torque oscillator for fast switching of write pole magnetization
US8179633B2 (en) 2009-08-28 2012-05-15 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system and write head with transverse auxiliary pole for fast switching of write pole magnetization

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