KR100832191B1 - 자기저항 소자 및 자기 메모리 - Google Patents
자기저항 소자 및 자기 메모리 Download PDFInfo
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- KR100832191B1 KR100832191B1 KR1020070025416A KR20070025416A KR100832191B1 KR 100832191 B1 KR100832191 B1 KR 100832191B1 KR 1020070025416 A KR1020070025416 A KR 1020070025416A KR 20070025416 A KR20070025416 A KR 20070025416A KR 100832191 B1 KR100832191 B1 KR 100832191B1
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- G—PHYSICS
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- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/14—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements
- G11C11/15—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements using multiple magnetic layers
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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
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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
- H01F10/325—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the spacer being noble metal
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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
- H01F10/3254—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the spacer being semiconducting or insulating, e.g. for spin tunnel junction [STJ]
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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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- 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
- H01F10/3286—Spin-exchange coupled multilayers having at least one layer with perpendicular magnetic anisotropy
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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
- H01F10/329—Spin-exchange coupled multilayers wherein the magnetisation of the free layer is switched by a spin-polarised current, e.g. spin torque effect
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B61/00—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices
- H10B61/20—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having three or more electrodes, e.g. transistors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/10—Magnetoresistive 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
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
- H01F10/123—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys having a L10 crystallographic structure, e.g. [Co,Fe][Pt,Pd] thin films
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- Hall/Mr Elements (AREA)
- Mram Or Spin Memory Techniques (AREA)
Abstract
Description
Claims (20)
- 자기저항 소자에 있어서,고정 자화 방향을 갖고 있는 제1 자성 기준 층(a first magnetic reference layer);스핀 분극 전자들을 공급받음으로써 변경될 수 있는 자화 방향을 갖고 있는 자성 자유 층;고정 자화 방향을 갖고 있는 제2 자성 기준 층;상기 제1 자성 기준 층과 상기 자성 자유 층 사이에 제공된 제1 중간층; 및상기 자성 자유 층과 상기 제2 자성 기준 층 사이에 제공된 제2 중간층을 포함하며,상기 자성 자유 층 및 상기 제1 자성 기준 층은 평면 내 방향(in-plane direction)에 대해서 수직이거나 평행한 용이 자화(easy magnetization)의 방향들을 갖고 있으며;상기 제1 자성 기준 층 및 상기 제2 자성 기준 층은 서로 수직한 용이 자화 방향들을 갖고 있는 자기저항 소자.
- 제1항에 있어서,상기 자성 자유 층 및 상기 제1 자성 기준 층은 상기 평면 내 방향에 대해 수직의 용이 자화 방향들을 갖고 있으며;상기 제2 자성 기준 층은 상기 평면 내 방향에 대해 평행한 용이 자화 방향을 갖고 있는자기저항 소자.
- 제1항에 있어서, 상기 제1 자성 기준 층, 상기 자성 자유 층, 및 상기 제2 자성 기준 층은 상기 평면 내 방향에 대해 평행한 용이 자화 방향들을 갖고 있는 자기저항 소자.
- 제1항에 있어서, 상기 제1 중간층은 절연 재료 및 반도체 중 하나로 이루어지는 자기저항 소자.
- 제1항에 있어서, 상기 제2 중간층은 도체로 이루어지는 자기저항 소자.
- 제1항에 있어서,상기 자성 자유 층은 순서대로 스택되어 있는 제1 자성 층, 제2 자성 층, 및 제3 자성 층을 포함하며;상기 제1 자성 층은 상기 제1 중간층과 접촉하게 배치되어 있으며;상기 제3 자성 층은 상기 제2 중간층과 접촉하게 배치되어 있는자기저항 소자.
- 제6항에 있어서, 상기 제1 자성 층 및 상기 제3 자성 층은 강자성 재료로 이루어진 자기저항 소자.
- 제1항에 있어서,상기 제1 자성 기준 층은 스택되어 있는 제1 자성 층 및 제2 자성 층을 포함하며;상기 제1 자성 층은 상기 제1 중간층과 접촉하게 배치되어 있는자기저항 소자.
- 제8항에 있어서, 상기 제1 자성 층은 강자성 재료로 이루어진 자기저항 소자.
- 제1항에 있어서, 상기 제1 자성 기준 층은 순서대로 스택되어 있는 제1 자성 층, 비자성 층(a nonmagnetic layer) 및 제2 자성 층을 포함하는 자기저항 소자.
- 제10항에 있어서, 상기 제1 자성 층 및 상기 제2 자성 층의 자화 방향들은 반대 방향으로 설정되는 자기저항 소자.
- 제1항에 있어서, 상기 제2 자성 기준 층은 순서대로 스택되어 있는 제1 자성 층, 비자성 층 및 제2 자성 층을 포함하는 자기저항 소자.
- 제12항에 있어서, 상기 제1 자성 층 및 상기 제2 자성 층의 자화 방향들은 반대 방향으로 설정되는 자기저항 소자.
- 제1항에 있어서, 상기 자성 자유 층은 순서대로 적층되어 있는 제1 자성 층, 비자성 층 및 제2 자성 층을 포함하는 자기저항 소자.
- 제14항에 있어서, 상기 제1 자성 층 및 상기 제2 자성 층의 자화 방향들은 반대 방향으로 설정되는 자기저항 소자.
- 제1항에 있어서, 교환 결합력으로 상기 제1 자성 기준 층의 자화 방향을 고정하는 반강자성 층을 더 포함하는 자기저항 소자.
- 제1항에 있어서, 상기 제2 자성 기준 층의 자화 방향을 교환 결합력(an exchange coupling force)으로 고정하는 반강자성 층(an antiferromagnetic layer)을 더 포함하는 자기저항 소자.
- 메모리 셀을 포함하는 자기 메모리에 있어서,자기저항 소자; 및상기 자기저항 소자에 전류를 공급하는 제1 전극 및 제2 전극을 포함하며,상기 자기저항 소자는고정 자화 방향을 갖고 있는 제1 자성 기준 층;스핀 분극 전자들을 공급받음으로써 변경될 수 있는 자화 방향을 갖고 있는 자성 자유 층;고정 자화 방향을 갖고 있는 제2 자성 기준 층;상기 제1 자성 기준 층과 상기 자성 자유 층 사이에 제공된 제1 중간층; 및상기 자성 자유 층과 상기 제2 자성 기준 층 사이에 제공된 제2 중간층을 포함하며,상기 자성 자유 층 및 상기 제1 자성 기준 층은 평면 내 방향에 대해서 수직이거나 평행한 용이 자화 방향들을 갖고 있으며;상기 제1 자성 기준 층 및 상기 제2 자성 기준 층은 서로 수직한 용이 자화 방향들을 갖고 있는자기 메모리.
- 제18항에 있어서, 상기 제1 전극 및 상기 제2 전극에 전기적으로 접속되며, 상기 전류를 상기 자기저항 소자에 양방향으로(bidirectionally) 공급하는 전원 회로를 더 포함하는 자기 메모리.
- 제19항에 있어서, 상기 메모리 셀은 상기 제2 전극 및 상기 전원 회로에 전기적으로 접속되는 선택 트랜지스터를 포함하는 메모리.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JPJP-P-2006-00172844 | 2006-06-22 | ||
JP2006172844 | 2006-06-22 |
Publications (2)
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KR20070121504A KR20070121504A (ko) | 2007-12-27 |
KR100832191B1 true KR100832191B1 (ko) | 2008-05-23 |
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KR1020070025416A KR100832191B1 (ko) | 2006-06-22 | 2007-03-15 | 자기저항 소자 및 자기 메모리 |
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US (1) | US20070297220A1 (ko) |
KR (1) | KR100832191B1 (ko) |
CN (1) | CN101093721A (ko) |
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