JP2005510052A - デジタル磁気メモリセルユニットにおける交換結合している層システムを均一に磁化する方法 - Google Patents
デジタル磁気メモリセルユニットにおける交換結合している層システムを均一に磁化する方法 Download PDFInfo
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- JP2005510052A JP2005510052A JP2003544775A JP2003544775A JP2005510052A JP 2005510052 A JP2005510052 A JP 2005510052A JP 2003544775 A JP2003544775 A JP 2003544775A JP 2003544775 A JP2003544775 A JP 2003544775A JP 2005510052 A JP2005510052 A JP 2005510052A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- 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
-
- 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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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
- H01F41/30—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE]
- H01F41/302—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F41/303—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices with exchange coupling adjustment of magnetic film pairs, e.g. interface modifications by reduction, oxidation
- H01F41/304—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices with exchange coupling adjustment of magnetic film pairs, e.g. interface modifications by reduction, oxidation using temporary decoupling, e.g. involving blocking, Néel or Curie temperature transitions by heat treatment in presence/absence of a magnetic field
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Thermal Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Mram Or Spin Memory Techniques (AREA)
- Hall/Mr Elements (AREA)
- Semiconductor Memories (AREA)
- Thin Magnetic Films (AREA)
Abstract
Description
AAFシステムの磁気剛性は、両方の強磁性層の磁化を同じ方向に回転させるために(つまり、平行に配置するために)必要な、印加外部電界の振幅に対応している。そのことが、このようなメモリセルユニットの読み出しおよび書き込みに使用するための磁気窓(magnetische Fenster)を、制限する。
2 基準層システム
3 結合層
4 軟磁性測定層システム
5a、5b ワード線およびビット線
6 AAF層システム
7 下部強磁性層
8 上部強磁性層
9 結合層
10 反強磁性層
11 装置
12 容器
13 回転盤
14 基板
15 磁界形成ユニット
16 装置
17 容器
18 基板
19 磁気形成ユニット
20 回転ユニット
T 温度
H 磁界
P 矢印
N 電極
S 電極
Claims (12)
- デジタル磁気メモリセルユニットにおける交換結合している層システムを均一に磁化する方法において、
上記のユニットは、AAF層システム、および、このシステムの層と交換結合する反強磁性層を含んでおり、
上記反強磁性層の磁化方向が規定されている場合に、AAF層システムの磁性層を磁界中で飽和させ、
次に、反強磁性層の磁化方向と飽和磁界の方向との互いの相対的位置を、互いの角度がα(0°<α<180°)となるように変え、
その後、飽和磁界をOFF状態にすることを特徴とする方法。 - 角度αを、60°から120°の間、特に90°に設定することを特徴とする、請求項1に記載の方法。
- 上記角度を設定するために、メモリセルユニットを、固定されている磁界に対して回転させることを特徴とする、請求項1または2に記載の方法。
- 上記角度を設定するために、磁界を、固定されているメモリセルユニットに対して移動させることを特徴とする、請求項1または2に記載の方法。
- 上記角度を設定するために、磁界およびメモリセルユニットを移動させることを特徴とする、請求項1または2に記載の方法。
- 上記反強磁性層の磁化を設定するために、温度を上記層の遮断温度よりも上げ、温度を遮断温度よりも高くしている間、飽和磁界を印加しておき、
その後、温度を下げ、上記層システムの磁化の設定を行うことを特徴とする、請求項1〜5のいずれか1項に記載の方法。 - 請求項1〜6のいずれか1項に記載の方法にしたがって設定された磁化を有する、磁気抵抗メモリセルユニット。
- 複数の請求項7に記載のメモリセルユニットを含んだ、磁気抵抗メモリセルユニット。
- 少なくとも1つのメモリセルユニットを有する基板のための容器と、磁界形成ユニットとを含んだ、請求項1〜6のいずれか1項に記載の方法を実施するための装置において、
上記容器および磁界形成ユニットが、互いに対して回転できることを特徴とする装置。 - 上記容器が回転盤であり、磁界形成ユニットが固定されていることを特徴とする、請求項9に記載の装置。
- 上記容器が固定されており、磁界ユニットが回転可能であることを特徴とする、請求項9に記載の装置。
- 上記容器、場合によっては回転盤が、加熱可能であることを特徴とする、請求項9〜11のいずれか1項に記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10155424A DE10155424B4 (de) | 2001-11-12 | 2001-11-12 | Verfahren zur homogenen Magnetisierung eines austauschgekoppelten Schichtsystems einer digitalen magnetischen Speicherzelleneinrichtung |
DE10155424.9 | 2001-11-12 | ||
PCT/DE2002/003789 WO2003043036A1 (de) | 2001-11-12 | 2002-10-08 | Verfahren zur homogenen magnetisierung eines austauschgekoppelten schichtsystems einer digitalen magnetischen speicherzelleneinrichtung |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005510052A true JP2005510052A (ja) | 2005-04-14 |
JP2005510052A6 JP2005510052A6 (ja) | 2005-08-04 |
JP4391236B2 JP4391236B2 (ja) | 2009-12-24 |
Family
ID=7705420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003544775A Expired - Fee Related JP4391236B2 (ja) | 2001-11-12 | 2002-10-08 | デジタル磁気メモリセルユニットにおける交換結合している層システムを均一に磁化する方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7075814B2 (ja) |
EP (1) | EP1444709B1 (ja) |
JP (1) | JP4391236B2 (ja) |
KR (1) | KR100706070B1 (ja) |
CN (1) | CN100409382C (ja) |
DE (2) | DE10155424B4 (ja) |
WO (1) | WO2003043036A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7414881B2 (en) * | 2004-03-31 | 2008-08-19 | Nec Corporation | Magnetization direction control method and application thereof to MRAM |
US7061787B2 (en) * | 2004-04-30 | 2006-06-13 | International Business Machines Corporation | Field ramp down for pinned synthetic antiferromagnet |
DE102008050716A1 (de) | 2007-10-02 | 2009-04-09 | Melzer, Dieter, Dr.-Ing. | Röntgen-Drehanodenteller und Verfahren zu seiner Herstellung |
US8310866B2 (en) * | 2008-07-07 | 2012-11-13 | Qimonda Ag | MRAM device structure employing thermally-assisted write operations and thermally-unassisted self-referencing operations |
EP2528060B1 (en) * | 2011-05-23 | 2016-12-14 | Crocus Technology S.A. | Multibit cell with synthetic storage layer |
EP2538235B1 (de) * | 2011-06-24 | 2013-07-31 | Christian-Albrechts-Universität zu Kiel | Magnetostriktives Schichtsystem |
JP5982795B2 (ja) * | 2011-11-30 | 2016-08-31 | ソニー株式会社 | 記憶素子、記憶装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19520172A1 (de) * | 1995-06-01 | 1996-12-05 | Siemens Ag | Magnetisierungseinrichtung für ein magnetoresistives Dünnschicht-Sensorelement mit einem Biasschichtteil |
US5742162A (en) * | 1996-07-17 | 1998-04-21 | Read-Rite Corporation | Magnetoresistive spin valve sensor with multilayered keeper |
US6114719A (en) * | 1998-05-29 | 2000-09-05 | International Business Machines Corporation | Magnetic tunnel junction memory cell with in-stack biasing of the free ferromagnetic layer and memory array using the cell |
DE19953190C2 (de) * | 1999-11-05 | 2002-11-07 | Bosch Gmbh Robert | Sensoranordnung zur Erfassung eines Drehwinkels |
WO2001051949A1 (en) * | 2000-01-13 | 2001-07-19 | Seagate Technology Llc | Dual spin-valve magnetoresistive sensor |
DE10113853B4 (de) * | 2000-03-23 | 2009-08-06 | Sharp K.K. | Magnetspeicherelement und Magnetspeicher |
US6744086B2 (en) * | 2001-05-15 | 2004-06-01 | Nve Corporation | Current switched magnetoresistive memory cell |
DE10128262A1 (de) * | 2001-06-11 | 2002-12-19 | Siemens Ag | Magnetoresistives Sensorsystem |
DE10155423B4 (de) * | 2001-11-12 | 2006-03-02 | Siemens Ag | Verfahren zur homogenen Magnetisierung eines austauschgekoppelten Schichtsystems eines magneto-resistiven Bauelements, insbesondere eines Sensor-oder Logikelements |
US6795334B2 (en) * | 2001-12-21 | 2004-09-21 | Kabushiki Kaisha Toshiba | Magnetic random access memory |
-
2001
- 2001-11-12 DE DE10155424A patent/DE10155424B4/de not_active Expired - Fee Related
-
2002
- 2002-10-08 US US10/495,301 patent/US7075814B2/en not_active Expired - Fee Related
- 2002-10-08 JP JP2003544775A patent/JP4391236B2/ja not_active Expired - Fee Related
- 2002-10-08 DE DE50213768T patent/DE50213768D1/de not_active Expired - Lifetime
- 2002-10-08 WO PCT/DE2002/003789 patent/WO2003043036A1/de active Application Filing
- 2002-10-08 EP EP02782702A patent/EP1444709B1/de not_active Expired - Lifetime
- 2002-10-08 CN CNB028223756A patent/CN100409382C/zh not_active Expired - Fee Related
- 2002-10-08 KR KR1020047007143A patent/KR100706070B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN1630921A (zh) | 2005-06-22 |
KR100706070B1 (ko) | 2007-04-11 |
DE10155424B4 (de) | 2010-04-29 |
EP1444709A1 (de) | 2004-08-11 |
US20050105355A1 (en) | 2005-05-19 |
DE50213768D1 (de) | 2009-09-24 |
CN100409382C (zh) | 2008-08-06 |
DE10155424A1 (de) | 2003-05-22 |
US7075814B2 (en) | 2006-07-11 |
KR20050034629A (ko) | 2005-04-14 |
WO2003043036A1 (de) | 2003-05-22 |
EP1444709B1 (de) | 2009-08-12 |
JP4391236B2 (ja) | 2009-12-24 |
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