KR100373473B1 - 자기 저항 효과 소자, 자기 저항 효과 헤드, 자기 재생장치 및 자성 적층체 - Google Patents
자기 저항 효과 소자, 자기 저항 효과 헤드, 자기 재생장치 및 자성 적층체 Download PDFInfo
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- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
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- 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
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- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
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- 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
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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
- G11B5/3903—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 using magnetic thin film layers or their effects, the films being part of integrated structures
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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
- G11B5/3903—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 using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3909—Arrangements using a magnetic tunnel junction
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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
- G11B5/3903—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 using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3916—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide
- G11B5/3919—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path
- G11B5/3922—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure
- G11B5/3925—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure the two parts being thin films
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- 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
- H01F10/3263—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 symmetric, e.g. for dual spin valve, e.g. NiO/Co/Cu/Co/Cu/Co/NiO
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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
- G11B2005/3996—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 large or giant magnetoresistive effects [GMR], e.g. as generated in spin-valve [SV] devices
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Abstract
Description
Claims (23)
- 제1 반강자성층과,상기 제1 반강자성층과 교환 결합한 강자성층으로서 제1 방향의 자화를 갖는 제1 강자성층과,상기 제1 강자성층과 적층 형성된 자화 결합층과,상기 자화 결합층을 개재하여 상기 제1 강자성층과 적층 형성되고, 상기 자화 결합층에 의하여 상기 제1 강자성층과 자화 결합되어 상기 제1 방향과 거의 직교 방향의 자화를 갖는 제2 강자성층과,중간 비자성층과,상기 중간 비자성층을 개재하여 상기 제2 강자성층과 적층 형성되고, 외부 자장이 제로인 상태에서 상기 제1 방향과 거의 동일 방향의 자화를 갖는 제3 강자성층과,상기 제3 강자성층과 교환 결합한 제2 반강자성층을 구비하는 것을 특징으로 하는 자기 저항 효과 소자.
- 제1항에 있어서,상기 자화 결합층은 동일 금속의 가수(價數)가 다른 산화물을 2종 이상 포함하는 혼상막(混相膜), 또는 동일 금속의 가수가 다른 산화물층을 2층 이상 포함하는 적층막을 구비하는 것을 특징으로 하는 자기 저항 효과 소자.
- 제1 방향의 자화를 갖는 제1 강자성층과,동일 금속의 가수가 다른 산화물을 2종 이상 포함하는 혼상막, 또는 동일 금속의 가수가 다른 산화물층을 2층 이상 포함하는 적층막을 구비하고, 상기 제1 강자성층과 적층 형성된 삽입층과,상기 삽입층을 개재하여 상기 제1 강자성층과 적층 형성되고, 상기 제1 방향과 거의 직교 방향의 자화를 갖는 제2 강자성층과,중간 비자성층과,상기 중간 비자성층을 개재하여 상기 제2 강자성층과 적층 형성되고, 외부 자장이 제로인 상태에서 상기 제1 방향과 거의 동일 방향의 자화를 갖는 제3 강자성층을 구비하는 것을 특징으로 하는 자기 저항 효과 소자.
- 제3항에 있어서,상기 제1 강자성층에 적층 형성된 제1 반강자성층, 및 상기 제3 강자성층에 적층 형성된 제2 반강자성층을 구비하는 것을 특징으로 하는 자기 저항 효과 소자.
- 제2항 또는 제3항에 있어서,상기 가수가 다른 산화물은 Fe 산화물로 구성되고, FeO, Fe3O4, α- Fe2O3, γ- Fe2O3중에서 선택되는 것을 특징으로 하는 자기 저항 효과 소자.
- 제2항 또는 제3항에 있어서,상기 가수가 다른 산화물은 Cr 산화물로 구성되고, CrO, Cr2O3,CrO2, Cr2O5, CrO3, CrO5중에서 선택되는 것을 특징으로 하는 자기 저항 효과 소자.
- 제2항 또는 제3항에 있어서,상기 가수가 다른 산화물은 Mn 산화물로 구성되고, MnO, MnO2중에서 선택되는 것을 특징으로 하는 자기 저항 효과 소자.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 제2 강자성층은 외부 자장의 변동에 따라 상기 자화 방향이 변화하는 자화 자유층이고, 상기 제3 강자성층은 상기 제2 강자성층의 자화 방향이 변화하는 외부 자장에 있어서, 상기 자화 방향이 실질적으로 변화하지 않는 자화 고착층인 것을 특징으로 하는 자기 저항 효과 소자.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 제3 강자성층은 외부 자장의 변동에 따라 상기 자화 방향이 변화하는 자화 자유층이고, 상기 제2 강자성층은 상기 제3 강자성층의 상기 자화 방향이 변화하는 외부 자장에 있어서, 상기 자화 방향이 실질적으로 변화하지 않는 자화 고착층인 것을 특징으로 하는 자기 저항 효과 소자.
- 제1 반강자성층과,상기 제1 반강자성층과 교환 결합한 강자성층으로서 제1 방향의 자화를 갖는 제1 강자성층과,상기 제1 강자성층과 적층 형성된 자화 결합층과,상기 자화 결합층을 개재하여 상기 제1 강자성층과 적층 형성되고, 상기 자화 결합층에 의하여 상기 제1 강자성층과 자화 결합되어 상기 제1 방향과 거의 직교 방향의 자화를 갖는 제2 강자성층과,중간 비자성층과,상기 중간 비자성층을 개재하여 상기 제2 강자성층과 적층 형성되고, 외부 자장이 제로인 상태에서 제1 방향과 거의 동일 방향의 자화를 갖는 제3 강자성층과,상기 제3 강자성층과 교환 결합한 제2 반강자성층을 구비하는 자기 저항 효과 소자를 구비하는 것을 특징으로 하는 자기 저항 효과 헤드.
- 제10항에 있어서,상기 자화 결합층은 동일 금속의 가수가 다른 산화물을 2종 이상 포함한 혼상막, 또는 동일 금속의 가수가 다른 산화물층을 2층 이상 포함하는 적층막을 구비하는 것을 특징으로 하는 자기 저항 효과 헤드.
- 제1 방향의 자화를 갖는 제1 강자성층과,동일 금속의 가수가 다른 산화물을 2종 이상 포함하는 혼상막, 또는 동일 금속의 가수가 다른 산화물층이 2층 이상 적층된 적층막을 구비하고, 상기 제1 강자성층과 적층 형성된 삽입층과,상기 삽입층을 개재하여 상기 제1 강자성층과 적층 형성되고, 상기 제1 방향과 거의 직교 방향의 자화를 갖는 제2 강자성층과,중간 비자성층과,상기 중간 비자성층을 개재하여 상기 제2 강자성층과 적층 형성되고, 외부 자장이 제로인 상태에서 제1 방향과 거의 동일 방향의 자화를 갖는 제3 강자성층을 구비하는 자기 저항 효과 소자를 구비하는 것을 특징으로 하는 자기 저항 효과 헤드.
- 제11항 또는 제12항에 있어서,상기 가수가 다른 산화물은 Fe 산화물로 구성되고, FeO, Fe3O4, α- Fe2O3, γ- Fe2O3중에서 선택되는 것을 특징으로 하는 자기 저항 효과 헤드.
- 제11항 또는 제12항에 있어서,상기 가수가 다른 산화물은 Cr 산화물로 구성되고, CrO, Cr2O3,CrO2, Cr2O5, CrO3, CrO5중에서 선택되는 것을 특징으로 하는 자기 저항 효과 헤드.
- 제11항 또는 제12항에 있어서,상기 가수가 다른 산화물은 Mn 산화물로 구성되고, MnO, MnO2중에서 선택되는 것을 특징으로 하는 자기 저항 효과 헤드.
- 제10항 내지 제12항 중 어느 한 항에 있어서,상기 제2 강자성층은 외부 자장의 변동에 따라 상기 자화 방향이 변화하는 자화 자유층이고, 상기 제3 강자성층은 상기 제2 강자성층의 자화 방향이 변화하는 외부 자장에 있어서, 상기 자화 방향이 실질적으로 변화하지 않는 자화 고착층인 것을 특징으로 하는 자기 저항 효과 헤드.
- 제10항 내지 제12항 중 어느 한 항에 있어서,상기 제3 강자성층은 외부 자장의 변동에 따라 상기 자화 방향이 변화하는 자화 자유층이고, 상기 제2 강자성층은 상기 제3 강자성층의 상기 자화 방향이 변화하는 외부 자장에 있어서, 상기 자화 방향이 실질적으로 변화하지 않는 자화 고착층인 것을 특징으로 하는 자기 저항 효과 헤드.
- 제10항 내지 제12항 중 어느 한 항에 있어서,일단에 매체 대향면을 구비하고,상기 매체 대향면으로부터 이간되어 상기 자기 저항 효과 소자가 배치되고,상기 매체 대향면과 상기 자기 저항 효과 소자간에 배치되며, 상기 매체 대향면에서 외부 자장을 취하여 상기 외부 자장을 상기 자기 저항 효과 소자로 인도하는 자기 요오크를 구비하는 것을 특징으로 하는 자기 저항 효과 헤드.
- 자기 기록 매체와,상기 자기 기록 매체에 기록된 자기 정보를 재생하는 자기 저항 효과 헤드로서,제1 방향의 자화를 갖는 제1 강자성층과,동일 금속의 가수가 다른 산화물을 2종 이상 포함하는 혼상막, 또는 동일 금속의 가수가 다른 산화물층이 2층 이상 적층된 적층막을 구비하여 상기 제1 강자성층과 적층 형성된 삽입층과,상기 삽입층을 개재하여 상기 제1 강자성층과 적층 형성되고, 상기 제1 방향과 거의 직교 방향의 자화를 갖는 제2 강자성층과,중간 비자성층과,상기 중간 비자성층을 개재하여 상기 제2 강자성층과 적층 형성되고, 외부 자장이 제로인 상태에서 제1 방향과 거의 동일 방향의 자화를 갖는 제3 강자성층을 구비하는 자기 저항 효과 헤드를 탑재하는 것을 특징으로 하는 자기 재생 장치.
- 제1 방향의 자화를 갖는 제1 강자성층과,상기 제1 방향의 자화와 거의 직교 방향의 제2 자화를 갖는 제2 강자성층과,상기 제1 및 제2 강자성층 사이에 형성된 층간막으로서, 동일 금속의 가수가 다른 산화물을 2종이상 포함한 혼상액, 또는 동일 금속의 가수가 다른 산화층을 2층이상 포함하는 적층막을 구비하는 층간막을 구비하는 것을 특징으로 하는 자성 적층체.
- 제20항에 있어서,상기 가수가 다른 산화물은 Fe 산화물로 구성되고, FeO, Fe3O4, α- Fe2O3, γ- Fe2O3중에서 선택되는 것을 특징으로 하는 자성 적층체.
- 제20항에 있어서,상기 가수가 다른 산화물은 Cr 산화물로 구성되고, CrO, Cr2O3,CrO2, Cr2O5, CrO3, CrO5중에서 선택되는 것을 특징으로 하는 자성 적층체.
- 제20항에 있어서,상기 가수가 다른 산화물은 Mn 산화물로 구성되고, MnO, MnO2중에서 선택되는 것을 특징으로 하는 자성 적층체.
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| EP0687917A2 (en) * | 1994-06-15 | 1995-12-20 | International Business Machines Corporation | Spin valve magnetoresistive sensor with self-pinned laminated layer and magnetic recording system using the sensor |
| JPH08279119A (ja) * | 1995-04-06 | 1996-10-22 | Fujitsu Ltd | 磁気抵抗効果素子、磁気再生装置及び磁気記録再生装置 |
| JPH0963021A (ja) * | 1995-06-15 | 1997-03-07 | Tdk Corp | スピンバルブ構造を有する磁気抵抗効果素子及びその製造方法 |
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| KR19980086556A (ko) * | 1997-05-13 | 1998-12-05 | 제프리 엘.포먼 | 재설정 가능항 대칭형 스핀 밸브 |
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| TW367493B (en) | 1996-04-30 | 1999-08-21 | Toshiba Corp | Reluctance component |
| US6317297B1 (en) * | 1999-10-06 | 2001-11-13 | Read-Rite Corporation | Current pinned dual spin valve with synthetic pinned layers |
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- 2000-09-07 KR KR10-2000-0052963A patent/KR100373473B1/ko not_active Expired - Fee Related
- 2000-09-25 US US09/668,471 patent/US6710984B1/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0687917A2 (en) * | 1994-06-15 | 1995-12-20 | International Business Machines Corporation | Spin valve magnetoresistive sensor with self-pinned laminated layer and magnetic recording system using the sensor |
| JPH08279119A (ja) * | 1995-04-06 | 1996-10-22 | Fujitsu Ltd | 磁気抵抗効果素子、磁気再生装置及び磁気記録再生装置 |
| JPH0963021A (ja) * | 1995-06-15 | 1997-03-07 | Tdk Corp | スピンバルブ構造を有する磁気抵抗効果素子及びその製造方法 |
| JPH1083523A (ja) * | 1996-08-26 | 1998-03-31 | Read Rite Corp | 磁気抵抗型センサ |
| KR19980086556A (ko) * | 1997-05-13 | 1998-12-05 | 제프리 엘.포먼 | 재설정 가능항 대칭형 스핀 밸브 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010030300A (ko) | 2001-04-16 |
| US6710984B1 (en) | 2004-03-23 |
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