JP2008016738A - 磁気抵抗効果素子、磁気ヘッド、磁気記録再生装置、および磁気メモリ - Google Patents
磁気抵抗効果素子、磁気ヘッド、磁気記録再生装置、および磁気メモリ Download PDFInfo
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Hall/Mr Elements (AREA)
- Magnetic Heads (AREA)
- Mram Or Spin Memory Techniques (AREA)
Abstract
【解決手段】磁化固着層、磁化自由層、及び非磁性中間層を有する磁気抵抗効果膜と、この磁気抵抗効果膜の膜面に対して略平行かつ磁化固着層の磁化に対して略垂直に、前記磁化自由層に縦バイアス磁界を加えるための縦バイアス機構部とを具え、前記磁化自由層の、縦バイアス磁界に略平行な方向の幅をMRT、縦バイアス磁界に略直角かつ前記信号磁界の方向に略平行な方向の幅をMRHとしたときに、
1.2≦MRH/MRT
なる関係式を満足するような垂直通電型の磁気抵抗効果素子を作製する。
【選択図】図1
Description
磁化の方向が実質的に一方に固着された磁性体膜を有する磁化固着層、磁気記録媒体からの信号磁界に応じて磁化の方向が変化する磁性体膜を有する磁化自由層、及び前記磁化自由層と前記磁化固着層との間に設けられた金属的伝導を示す非磁性中間層を有する磁気抵抗効果膜と、
前記磁気抵抗効果膜の膜面に対して略平行かつ磁化固着層の磁化に対して略垂直に、前記磁化自由層に縦バイアス磁界を加えるための縦バイアス機構部と、
前記磁気抵抗効果膜の膜面に対して垂直方向に通電するために前記磁気抵抗効果膜に電気的に接続された一対の電極とを具え、
前記磁化自由層の、縦バイアス磁界に略平行な方向の幅をMRT、縦バイアス磁界に略直角かつ前記信号磁界の方向に略平行な方向の幅をMRHとしたときに、
1.2≦MRH/MRT
なる関係式を満足し、
前記磁化固着層から前記磁化自由層の方向に電流を通電して用いるように構成したことを特徴とする、磁気抵抗効果素子に関する。
1.2≦MRH/MRT≦2.5
なる関係式を満足するようにする。MRH/MRTの比を高くしすぎると、MRT方向の反磁界が大きくなりすぎ、縦バイアス磁界がうまくかからなくなってくるという問題がある。しかしながら、上述のようにMRH/MRTを2.5以下とすることにより、上述した問題を回避することができるようになる。
BP = (VC - VA)/(VB - VA)×100 = (VB - VC)/(VB - VA)×100 (%)
BP = (RC - RA)/(RB - RA)×100 = (RB - RC)/(RB - RA)×100 (%)
152 スピンドル
153 ヘッドスライダ
154 サスペンション
155 アクチュエータアーム
156 ボイスコイルモータ
157 スピンドル
160 磁気ヘッドアッセンブリ
164 リード線
200 磁気記録媒体ディスク
1100 垂直通電型磁気抵抗効果素子
1110 下部シールド層
1120 磁区制御膜
1130 絶縁体
1140 上部シールド層
1150 絶縁層
1200 スピンバルブ膜
1310 下地層
1320 反強磁性層
1340 磁化自由層
1341 中間層
1342 磁化固着層
1343 磁気結合層
1344 強磁性層
1345 エクスチェンジバイアス層
1346 エクスチェンジバイアス層内上部電極
1347 分離層
1348 インスタックバイアス層
1350 保護層
1360 レジスト層
Claims (11)
- 磁化の方向が実質的に一方に固着された磁性体膜を有する磁化固着層、磁気記録媒体からの信号磁界に応じて磁化の方向が変化する磁性体膜を有する磁化自由層、及び前記磁化自由層と前記磁化固着層との間に設けられた金属的伝導を示す非磁性中間層を有する磁気抵抗効果膜と、
前記磁気抵抗効果膜の膜面に対して略平行かつ磁化固着層の磁化に対して略垂直に、前記磁化自由層に縦バイアス磁界を加えるための縦バイアス機構部と、
前記磁気抵抗効果膜の膜面に対して垂直方向に通電するために前記磁気抵抗効果膜に電気的に接続された一対の電極とを具え、
前記磁化自由層の、縦バイアス磁界に略平行な方向の幅をMRT、縦バイアス磁界に略直角かつ前記信号磁界の方向に略平行な方向の幅をMRHとしたときに、
1.2≦MRH/MRT
なる関係式を満足し、
前記磁化固着層から前記磁化自由層の方向に電流を通電して用いるように構成したことを特徴とする、磁気抵抗効果素子。 - 前記磁化自由層の、縦バイアス磁界に略平行な方向の幅MRT及び縦バイアス磁界に略直角かつ前記信号磁界の方向に略平行な方向の幅MRHが、
1.2≦MRH/MRT≦2.5
なる関係式を満足することを特徴とする、請求項1に記載の磁気抵抗効果素子。 - 前記磁化固着層から前記磁化自由層の方へセンス電流を流すことを特徴とする、請求項1又は2に記載の磁気抵抗効果素子。
- バイアスポイントが20%以上80%以下であることを特徴とする、請求項1〜3のいずれか一に記載の磁気抵抗効果素子。
- 前記縦バイアス機構部は、少なくとも前記磁化固着層の端部に接触するようにして設けられた、硬磁性材料からなるバイアス層を含むことを特徴とする、請求項1〜4のいずれか一に記載の磁気抵抗効果素子。
- 前記縦バイアス機構部は、前記磁化固着層の上方において前記磁化固着層と磁気的に結合したバイアス層を含むことを特徴とする、請求項1〜4のいずれか一に記載の磁気抵抗効果素子。
- 前記バイアス層は反強磁性材料からなり、前記磁化固着層に対して交換結合を介して磁気的に結合していることを特徴とする、請求項6に記載の磁気抵抗効果素子。
- 前記バイアス層は硬磁性材料からなり、前記磁化固着層に対して静磁界的に結合していることを特徴とする、請求項6に記載の磁気抵抗効果素子。
- 請求項1〜8のいずれか一に記載の磁気抵抗効果素子を具えることを特徴とする、磁気ヘッド。
- 磁気記録媒体と、請求項9に記載の磁気ヘッドとを具えることを特徴とする、磁気記録再生装置。
- 請求項1〜8のいずれか一に記載の磁気抵抗効果素子を具えることを特徴とする磁気メモリ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2006188709A JP2008016738A (ja) | 2006-07-07 | 2006-07-07 | 磁気抵抗効果素子、磁気ヘッド、磁気記録再生装置、および磁気メモリ |
US11/709,795 US20080007877A1 (en) | 2006-07-07 | 2007-02-23 | Magneto-resistance effect element, magnetic head, magnetic recording/reproducing device and magnetic memory |
CNA2007101278758A CN101101756A (zh) | 2006-07-07 | 2007-07-09 | 磁阻效应元件,磁头,磁记录/再现装置和磁存储器 |
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JP2006188709A JP2008016738A (ja) | 2006-07-07 | 2006-07-07 | 磁気抵抗効果素子、磁気ヘッド、磁気記録再生装置、および磁気メモリ |
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US (1) | US20080007877A1 (ja) |
JP (1) | JP2008016738A (ja) |
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Cited By (1)
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JP2015125012A (ja) * | 2013-12-25 | 2015-07-06 | 株式会社東芝 | 電流センサ及び電流センサモジュール |
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JP2008243920A (ja) * | 2007-03-26 | 2008-10-09 | Toshiba Corp | 磁気抵抗効果再生素子、磁気ヘッド、および磁気再生装置 |
US8233248B1 (en) * | 2009-09-16 | 2012-07-31 | Western Digital (Fremont), Llc | Method and system for providing a magnetic recording transducer using a line hard mask |
US8871102B2 (en) | 2011-05-25 | 2014-10-28 | Western Digital (Fremont), Llc | Method and system for fabricating a narrow line structure in a magnetic recording head |
US9034564B1 (en) | 2013-07-26 | 2015-05-19 | Western Digital (Fremont), Llc | Reader fabrication method employing developable bottom anti-reflective coating |
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JP3234814B2 (ja) * | 1998-06-30 | 2001-12-04 | 株式会社東芝 | 磁気抵抗効果素子、磁気ヘッド、磁気ヘッドアセンブリ及び磁気記録装置 |
US6721147B2 (en) * | 1999-12-07 | 2004-04-13 | Fujitsu Limited | Longitudinally biased magnetoresistance effect magnetic head and magnetic reproducing apparatus |
JP4275347B2 (ja) * | 2002-03-20 | 2009-06-10 | Tdk株式会社 | 磁気検出素子 |
JP2004031547A (ja) * | 2002-06-25 | 2004-01-29 | Alps Electric Co Ltd | 磁気検出素子及びその製造方法 |
JP4244312B2 (ja) * | 2003-10-02 | 2009-03-25 | 株式会社東芝 | 磁気抵抗効果素子、磁気ヘッド及び磁気再生装置 |
US7466525B2 (en) * | 2004-09-03 | 2008-12-16 | Tdk Corporation | Magnetic sensing element including laminated film composed of half-metal and NiFe alloy as free layer |
US7423850B2 (en) * | 2005-03-31 | 2008-09-09 | Hitachi Global Storage Technologies Netherlands B.V. | CPP-GMR read head sensor with synthetic free layer providing suppression of spin torque noise |
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2006
- 2006-07-07 JP JP2006188709A patent/JP2008016738A/ja active Pending
-
2007
- 2007-02-23 US US11/709,795 patent/US20080007877A1/en not_active Abandoned
- 2007-07-09 CN CNA2007101278758A patent/CN101101756A/zh active Pending
Cited By (2)
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JP2015125012A (ja) * | 2013-12-25 | 2015-07-06 | 株式会社東芝 | 電流センサ及び電流センサモジュール |
US9841444B2 (en) | 2013-12-25 | 2017-12-12 | Kabushiki Kaisha Toshiba | Current sensor and current sensor module |
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US20080007877A1 (en) | 2008-01-10 |
CN101101756A (zh) | 2008-01-09 |
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