JP4954445B2 - 非晶質フェリ磁性合金を使用してスピン偏極電流で書き込みを行なう磁気メモリ及びその書き込み方法 - Google Patents
非晶質フェリ磁性合金を使用してスピン偏極電流で書き込みを行なう磁気メモリ及びその書き込み方法 Download PDFInfo
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- G—PHYSICS
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- 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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- 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
- G11C11/16—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
- G11C11/16—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
- G11C11/161—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 details concerning the memory cell structure, e.g. the layers of the ferromagnetic memory cell
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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
- G11C11/16—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
- G11C11/165—Auxiliary circuits
- G11C11/1675—Writing or programming circuits or methods
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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
- H01F10/3204—Exchange coupling of amorphous multilayers
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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
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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
- H10N50/80—Constructional details
- H10N50/85—Magnetic active materials
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- Crystallography & Structural Chemistry (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Nanotechnology (AREA)
- Hall/Mr Elements (AREA)
- Mram Or Spin Memory Techniques (AREA)
- Thin Magnetic Films (AREA)
- Semiconductor Memories (AREA)
- Hard Magnetic Materials (AREA)
Description
- 固定磁化を有するいわゆる固定磁性層と、
- 磁化を反転させることが可能ないわゆる自由磁性層と、
- 自由磁性層と固定磁性層との間に挟まれており、これらの2層それぞれと接触している絶縁層と
を備えた磁気メモリを提供する。
Claims (14)
- 磁気トンネル接合(60)で形成された複数のメモリポイントを有しており、前記各メ
モリポイントは、固定磁化を有する固定磁性層(61)と、磁化を反転させることが可能な自由磁性層(63)と、前記自由磁性層(63)と前記固定磁性層(61)との間に挟まれており、これらの2層と接触している絶縁層(62)とを備えている磁気メモリにおいて、
前記自由磁性層(63)は希土類及び遷移金属を主体とする非晶質又はナノ結晶の合金からなり、該合金の磁気の配列が、フェリ磁性型であって、希土類原子副格子及び遷移金属原子副格子を有しており、前記自由磁性層(63)が、実質的に面内磁化を有していて、希土類原子副格子の磁化寄与及び遷移金属原子副格子の磁化寄与のベクトル和がゼロとならないような希土類原子副格子及び遷移金属原子副格子の組成を有しており、
前記固定磁性層(61)によりスピン偏極された電流を書き込み対象のメモリポイントに送るためにメモリポイントに設けられた導体(67)を有することを特徴とする磁気メモリ。 - 前記自由磁性層(63)はガドリニウム及びコバルトの合金からなることを特徴とする
請求項1に記載の磁気メモリ。 - 前記自由磁性層(63)は1又は複数の置換元素を更に含有していることを特徴とする
請求項1又は2に記載の磁気メモリ。 - 前記置換元素はZr,Mo,Nb,Ta,Pt,Dy,Smからなるグループから選択
されていることを特徴とする請求項3に記載の磁気メモリ。 - 前記固定磁性層(61)は希土類及び遷移金属を主体とする非晶質の合金からなり、該
合金の磁気の配列がフェリ磁性型であることを特徴とする請求項1乃至4のいずれかに記載の磁気メモリ。 - 前記固定磁性層(61)はテルビウム及びコバルトを主体とする非晶質の合金からなる
ことを特徴とする請求項5に記載の磁気メモリ。 - 前記固定磁性層(61)はサマリウム及びコバルトの合金からなることを特徴とする請
求項5に記載の磁気メモリ。 - 各メモリポイントは、前記自由磁性層(63)に対して前記固定磁性層(61)とは反
対側に位置して、非磁性金属層(65)により前記自由磁性層(63)から離隔されており、メモリポイントに送られる電流をスピン偏極するための付加的な偏極フェロ磁性層(64)を更に備えることを特徴とする請求項1乃至7のいずれかに記載の磁気メモリ。 - 前記付加的な偏極フェロ磁性層(64)は磁気トンネル接合(60)を形成している各
層の面に垂直な磁化を有していることを特徴とする請求項8に記載の磁気メモリ。 - 前記付加的な偏極フェロ磁性層(64)は磁気トンネル接合(60)を形成している各
層の面に平行な磁化を有していることを特徴とする請求項8に記載の磁気メモリ。 - 前記付加的な偏極フェロ磁性層(64)はテルビウム及びコバルトの合金からなること
を特徴とする請求項8乃至10のいずれかに記載の磁気メモリ。 - 各メモリポイントが磁気トンネル接合(60)で形成されており、各メモリポイントは、固定磁化を有する固定磁性層(61)と、磁化を反転させることが可能な自由磁性層(63)と、前記自由磁性層(63)と前記固定磁性層(61)との間に挟まれており、これらの2層それぞれと接触している絶縁層(62)とを備えており、各メモリポイントが前記固定磁性層(61)で導体(67)と接触している磁気メモリへの書き込み方法において、
各メモリポイントについて、希土類及び遷移金属を主体とする非晶質又はナノ結晶であり、磁気の配列がフェリ磁性型であって希土類原子副格子及び遷移金属原子副格子を有している合金から、実質的に面内磁化を有していて、希土類原子副格子の磁化寄与及び遷移金属原子副格子の磁化寄与のベクトル和がゼロとならないような希土類原子副格子及び遷移金属原子副格子の組成を有している前記自由磁性層(63)を形成し、
書き込みが行なわれるべきメモリポイントの位置において、前記対応する導体(67)へ電流を送り、前記メモリポイントの固定磁性層(61)がスピン偏極を確実にすることを特徴とする磁気メモリへの書き込み方法。 - 電流を送って前記自由磁性層(63)の磁気モーメントの振幅を低減する際に、前記メ
モリポイントを加熱することを特徴とする請求項12に記載の磁気メモリへの書き込み方法。 - 前記固定磁性層(61)と対向する前記自由磁性層(63)側に位置して、非磁性金属
層(65)により前記自由磁性層(63)から離隔されており、電流をスピン偏極するための付加的な偏極フェロ磁性層(64)を設けることを特徴とする請求項12に記載の磁気メモリへの書き込み方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0112124A FR2829868A1 (fr) | 2001-09-20 | 2001-09-20 | Memoire magnetique a ecriture par courant polarise en spin, mettant en oeuvre des alliages amorphes ferrimagnetiques et procede pour son ecriture |
FR0112124 | 2001-09-20 | ||
PCT/FR2002/003210 WO2003025942A2 (fr) | 2001-09-20 | 2002-09-19 | Memoire magnetique a ecriture par courant polarise en spin, mettant en oeuvre des alliages amorphes ferrimagnetiques et procede pour son ecriture |
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Publication Number | Publication Date |
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JP2005503669A JP2005503669A (ja) | 2005-02-03 |
JP2005503669A5 JP2005503669A5 (ja) | 2005-12-22 |
JP4954445B2 true JP4954445B2 (ja) | 2012-06-13 |
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JP2003529474A Expired - Lifetime JP4954445B2 (ja) | 2001-09-20 | 2002-09-19 | 非晶質フェリ磁性合金を使用してスピン偏極電流で書き込みを行なう磁気メモリ及びその書き込み方法 |
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Country | Link |
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US (1) | US7332781B2 (ja) |
EP (1) | EP1430484B1 (ja) |
JP (1) | JP4954445B2 (ja) |
KR (1) | KR100902960B1 (ja) |
CN (1) | CN100592419C (ja) |
AT (1) | ATE378681T1 (ja) |
AU (1) | AU2002362337A1 (ja) |
DE (1) | DE60223573T2 (ja) |
FR (1) | FR2829868A1 (ja) |
WO (1) | WO2003025942A2 (ja) |
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-
2001
- 2001-09-20 FR FR0112124A patent/FR2829868A1/fr not_active Withdrawn
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2002
- 2002-09-19 AU AU2002362337A patent/AU2002362337A1/en not_active Abandoned
- 2002-09-19 AT AT02798773T patent/ATE378681T1/de not_active IP Right Cessation
- 2002-09-19 DE DE60223573T patent/DE60223573T2/de not_active Expired - Lifetime
- 2002-09-19 CN CN02818383A patent/CN100592419C/zh not_active Expired - Lifetime
- 2002-09-19 KR KR1020047004005A patent/KR100902960B1/ko active IP Right Grant
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- 2002-09-19 WO PCT/FR2002/003210 patent/WO2003025942A2/fr active IP Right Grant
- 2002-09-19 EP EP02798773A patent/EP1430484B1/fr not_active Expired - Lifetime
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US9825219B2 (en) | 2015-06-11 | 2017-11-21 | Samsung Electronics Co., Ltd. | Magnetic memory devices |
Also Published As
Publication number | Publication date |
---|---|
US7332781B2 (en) | 2008-02-19 |
DE60223573D1 (de) | 2007-12-27 |
CN1556998A (zh) | 2004-12-22 |
WO2003025942A3 (fr) | 2003-11-20 |
EP1430484A2 (fr) | 2004-06-23 |
AU2002362337A1 (en) | 2003-04-01 |
DE60223573T2 (de) | 2008-09-18 |
JP2005503669A (ja) | 2005-02-03 |
WO2003025942A2 (fr) | 2003-03-27 |
FR2829868A1 (fr) | 2003-03-21 |
US20050040433A1 (en) | 2005-02-24 |
EP1430484B1 (fr) | 2007-11-14 |
KR100902960B1 (ko) | 2009-06-15 |
CN100592419C (zh) | 2010-02-24 |
KR20040035824A (ko) | 2004-04-29 |
ATE378681T1 (de) | 2007-11-15 |
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