JPH07509811A - 合成反強磁性磁石を備えた磁気抵抗センサ及びその製造方法 - Google Patents
合成反強磁性磁石を備えた磁気抵抗センサ及びその製造方法Info
- Publication number
- JPH07509811A JPH07509811A JP6514674A JP51467494A JPH07509811A JP H07509811 A JPH07509811 A JP H07509811A JP 6514674 A JP6514674 A JP 6514674A JP 51467494 A JP51467494 A JP 51467494A JP H07509811 A JPH07509811 A JP H07509811A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- bias
- measurement
- magnetization
- magnetoresistive sensor
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
- H01F10/3268—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn
- H01F10/3272—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn by use of anti-parallel coupled [APC] ferromagnetic layers, e.g. artificial ferrimagnets [AFI], artificial [AAF] or synthetic [SAF] anti-ferromagnets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nanotechnology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Measuring Magnetic Variables (AREA)
- Hall/Mr Elements (AREA)
- Thin Magnetic Films (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
Claims (21)
- 1.a)1つの層構成を備え、この層構成は以下の特徴、即ちa1)少なくとも 1つの方向に可逆的に、加えられた磁場(H)に関係して層面が磁化(MM)さ れる少なくとも1つの測定層(2)が設けられ、その際この磁化(MM)は磁場 (H)がないとき所定の基底状態磁化(MMo)に一致し、a2)測定層(2) の少なくとも1つの面側に、磁場(H)の測定範囲に少なくとちほぼ一定に層面 が磁化(M■)されたバイアス層(6)が設けられ、このバイアス層が測定層( 2)から中間層(4)によって少なくともほぼ磁気的に交換脱結合されており、 a3)少なくとも1つのバイアス層(6)に結合層(8)を介して磁石層(10 )が反強磁性に結合されている特徴を有し、b)層構成に、加えられた磁場(H )の尺度である抵抗信号を検出するための測定接触部を備えた磁気抵抗センサ。
- 2.磁石層(10)のバイアス層(6)の反対側に異なるバイアス層(6′)が 異なる結合層(8′)を介して反強磁性に結合されていることを特徴とする請求 項1記載の磁気抵抗センサ。
- 3.各バイアス層(6、6′)に対して磁石層(10)と異なるキュリー温度を 持つ材料が使われていることを特徴とする請求項1又は2記載の磁気抵抗センサ 。
- 4.各バイアス層(6、6′)に対して磁石層(10)と異なる保磁力を持つ材 料が使われていることを特徴とする請求項1乃至3の1つに記載の磁気抵抗セン サ。
- 5.各ハイアス層(6、6′)が基準軸に沿って磁化されていることを特徴とす る上記請求項の1つに記載の磁気抵抗センサ。
- 6.測定層(2)の基底状態磁化(MMo)及びバイアス層(6)の磁化(M■ )が互いに少なくともほぼ垂直に向いていることを特徴とする上記請求項の1つ に記載の磁気抵抗センサ。
- 7.測定層(2)の基底状態磁化(MMo)及びバイアス層(6)の磁化(M■ )が互いに平行に向いていることを特徴とする上記請求項の1つに記載の磁気抵 抗センサ。
- 8.層の材料が、測定層(2)及びバイアス層(6)の磁化(M■、M■)の方 向が平行なとき測定層(2)において最も少なく散乱した一方のスピン状態を持 つ電子型が全ての他の磁性層及びその境界面において、他方のスピン状態を持つ 電子型より少なく散乱されるように選ばれていることを特徴とする上記請求項の 1つに記載の磁気抵抗セン。.
- 9.バイアス層(6)の磁化(M■)量が測定層(2)の基底状態磁化(MMo )量より小さく選ばれていることを特徴とする上記請求項の1つに記載の磁気抵 抗センサ。
- 10.測定層(2)とバイアス層(6)とが測定層(2)の基底状態磁化(M■ o)に対して垂直な長さ方向に延長されていることを特徴とする上記請求項の1 つに記載の磁気抵抗センサ。
- 11.測定層(2)がバイアス層(6)の磁化(M■)に対して少なくとも1つ の平行な方向においてバイアス層(6)より短く形成されていることを特徴とす る上記請求項の1つに記載の磁気抵抗センサ。
- 12.層構成の測定層(2)が存在しない縁部領域(21、25)と測定層(2 )の存在する内側の測定範囲(23)との間の移行部(22、24)における測 定層(2)の厚さが連続的に増加していることを特徴とする請求項11記載の磁 気択捉センサ。
- 13.測定接触部(11A、11B)が層構成の縁師から間隔をおいて配直され ていることを特徴とする上記請求項の1つに記吸の磁気抵抗センサ。
- 14.測定接触部が層構成の最上部層及び/又は最下部層に配置されていること を特徴とする上記請求項の1つに記載の磁気抵抗センサ。
- 15.少なくとも1つの潮定層(2)が中間層(4)を介して交換句脱結合され ている2つの河定層(2′、2′′)によって代替されていることを特徴とする 上記請求項の1つに記製の磁気抵抗センサ。
- 16.2つの湖定層(2′、2′′)の基底状態磁化(M■o′、M■o′′) が、磁場(H)が加えられていないときに、互いに少なくともほぼ反平行に向い 合っていることを特徴とする請求項15記載の磁気抵抗センサ。
- 17.2つの測定層(2′及び2′′)の基底状態磁(MMo′、MMo′)が それぞれ少なくともほぼ同じ角度だけバイアス層(6)の磁化(M■)に対する 垂線方向に対して傾斜しており、互いに180°より小さい角度で交わっている ことを特徴とする請求項16記載の磁気抵抗センサ。
- 18.各測定層(2′、2′′)が、磁場(H)が加わっていないとき、基準軸 の方向に磁化されていることを特徴とする上記請求項の1つに記載の磁気抵抗セ ンサ。
- 19.各磁石層(10)が基準軸に沿って磁化されていることを特徴とする上記 請求項の1つに記載の磁気抵抗センサ。
- 20.a)バイアス層(6)及び磁石層(10)に対しては異なるキュリー温度 Tc1,及びTc2を持ちかつ使用温度において少なくともほぼ同じに磁化され る磁性材料が選ばれており、 b)結合層(8)によって互いに結合されたバイアス層(6)と磁石層(10) とが使用温度と異なる印加温度(T■)にされかつ少なくともこの印加温度(T ■)において所定の値を持つ温度に関係するバイアス磁場(H■)に配電され、 c)続いてこれらの層が使用温度にされることを特徴とする上記請求項の1つに 記載の磁気抵抗センサの製造方法。
- 21.a)バイアス層(6)及び磁石層(10)対しては異なる保磁力を持つ磁 性材料が選ばれ、 h)結合層(8)によって互いに結合されたバイアス層(6)と磁石層(10) とが飽和磁場において飽和される ことを特徴とする請求項1乃至19の1つに記載の磁気抵抗センサの製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4243358.4 | 1992-12-21 | ||
DE4243358A DE4243358A1 (de) | 1992-12-21 | 1992-12-21 | Magnetowiderstands-Sensor mit künstlichem Antiferromagneten und Verfahren zu seiner Herstellung |
PCT/DE1993/001204 WO1994015223A1 (de) | 1992-12-21 | 1993-12-16 | Magnetowiderstands-sensor mit künstlichem antiferromagneten und verfahren zu seiner herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07509811A true JPH07509811A (ja) | 1995-10-26 |
JP2846472B2 JP2846472B2 (ja) | 1999-01-13 |
Family
ID=6476031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6514674A Expired - Lifetime JP2846472B2 (ja) | 1992-12-21 | 1993-12-16 | 合成反強磁性磁石を備えた磁気抵抗センサ及びその製造方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US5686838A (ja) |
EP (1) | EP0674769B1 (ja) |
JP (1) | JP2846472B2 (ja) |
KR (1) | KR950704694A (ja) |
AT (1) | ATE137866T1 (ja) |
DE (2) | DE4243358A1 (ja) |
ES (1) | ES2086993T3 (ja) |
WO (1) | WO1994015223A1 (ja) |
Cited By (5)
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US6114850A (en) * | 1997-03-18 | 2000-09-05 | Nec Corporation | Magnetoresistance effect element, and magnetoresistance effect sensor and magnetic information recording and playback system using same |
US6245450B1 (en) | 1997-11-17 | 2001-06-12 | Matsushita Electric Industrial Co., Ltd. | Exchange coupling film magnetoresistance effect device magnetoresistance effective head and method for producing magnetoresistance effect device |
US10983181B2 (en) | 2018-10-24 | 2021-04-20 | Tdk Corporation | Magnetic sensor |
US11579213B2 (en) | 2018-10-24 | 2023-02-14 | Tdk Corporation | Magnetic sensor |
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-
1993
- 1993-12-16 DE DE59302536T patent/DE59302536D1/de not_active Expired - Lifetime
- 1993-12-16 AT AT94901765T patent/ATE137866T1/de active
- 1993-12-16 US US08/454,340 patent/US5686838A/en not_active Expired - Lifetime
- 1993-12-16 WO PCT/DE1993/001204 patent/WO1994015223A1/de active IP Right Grant
- 1993-12-16 EP EP94901765A patent/EP0674769B1/de not_active Expired - Lifetime
- 1993-12-16 KR KR1019950702540A patent/KR950704694A/ko not_active Application Discontinuation
- 1993-12-16 ES ES94901765T patent/ES2086993T3/es not_active Expired - Lifetime
- 1993-12-16 JP JP6514674A patent/JP2846472B2/ja not_active Expired - Lifetime
Cited By (7)
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US6114850A (en) * | 1997-03-18 | 2000-09-05 | Nec Corporation | Magnetoresistance effect element, and magnetoresistance effect sensor and magnetic information recording and playback system using same |
US6452386B1 (en) | 1997-03-18 | 2002-09-17 | Nec Corporation | Magnetoresistance effect element, and magnetoresistance effect sensor and magnetic information recording and playback system using same |
US6456468B1 (en) | 1997-03-18 | 2002-09-24 | Nec Corporation | Magnetoresistance effect element, and magnetoresistance effect sensor and magnetic information recording and playback system using same |
US6087026A (en) * | 1997-06-04 | 2000-07-11 | Fujitsu Limited | Magnetoresistive head and magnetic read/write device |
US6245450B1 (en) | 1997-11-17 | 2001-06-12 | Matsushita Electric Industrial Co., Ltd. | Exchange coupling film magnetoresistance effect device magnetoresistance effective head and method for producing magnetoresistance effect device |
US10983181B2 (en) | 2018-10-24 | 2021-04-20 | Tdk Corporation | Magnetic sensor |
US11579213B2 (en) | 2018-10-24 | 2023-02-14 | Tdk Corporation | Magnetic sensor |
Also Published As
Publication number | Publication date |
---|---|
ATE137866T1 (de) | 1996-05-15 |
KR950704694A (ko) | 1995-11-20 |
EP0674769A1 (de) | 1995-10-04 |
ES2086993T3 (es) | 1996-07-01 |
DE59302536D1 (de) | 1996-06-13 |
JP2846472B2 (ja) | 1999-01-13 |
DE4243358A1 (de) | 1994-06-23 |
US5686838A (en) | 1997-11-11 |
EP0674769B1 (de) | 1996-05-08 |
WO1994015223A1 (de) | 1994-07-07 |
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