WO2003085674A3 - Synthetic-ferrimagnet sense-layer for high density mram applications - Google Patents

Synthetic-ferrimagnet sense-layer for high density mram applications Download PDF

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Publication number
WO2003085674A3
WO2003085674A3 PCT/US2003/007843 US0307843W WO03085674A3 WO 2003085674 A3 WO2003085674 A3 WO 2003085674A3 US 0307843 W US0307843 W US 0307843W WO 03085674 A3 WO03085674 A3 WO 03085674A3
Authority
WO
WIPO (PCT)
Prior art keywords
layer
synthetic
high density
mram applications
ferrimagnet
Prior art date
Application number
PCT/US2003/007843
Other languages
French (fr)
Other versions
WO2003085674A2 (en
Inventor
James G Deak
Original Assignee
Micron Technology Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Micron Technology Inc filed Critical Micron Technology Inc
Priority to EP03746039A priority Critical patent/EP1490877B1/en
Priority to DE60325948T priority patent/DE60325948D1/en
Priority to KR1020047015785A priority patent/KR100624762B1/en
Priority to JP2003582772A priority patent/JP2005522044A/en
Priority to AU2003225795A priority patent/AU2003225795A1/en
Publication of WO2003085674A2 publication Critical patent/WO2003085674A2/en
Publication of WO2003085674A3 publication Critical patent/WO2003085674A3/en

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Classifications

    • 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
    • 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
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • 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
    • 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
    • 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
    • G11C11/1659—Cell access
    • 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
    • G11C11/1673—Reading or sensing circuits or methods
    • 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
    • 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
    • H01F10/3218—Exchange coupling of magnetic films via an antiferromagnetic interface

Abstract

An magnetic memory element is provided in which a magnetic sense layer is formed of two ferromagnetic material layers separated by a spacer layer. The two ferromagnetic layers are formed as a synthetic ferrimagnet with stray field coupling and antiferromagnetic exchange coupling across the spacer layer.
PCT/US2003/007843 2002-04-03 2003-03-14 Synthetic-ferrimagnet sense-layer for high density mram applications WO2003085674A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP03746039A EP1490877B1 (en) 2002-04-03 2003-03-14 Synthetic-ferrimagnet sense-layer for high density mram applications
DE60325948T DE60325948D1 (en) 2002-04-03 2003-03-14 SYNTHETIC FERRIMAGNET LIGHTING LAYER FOR HIGH DENSITY MRAM USES
KR1020047015785A KR100624762B1 (en) 2002-04-03 2003-03-14 Synthetic-ferrimagnet sense-layer for high density mram applications
JP2003582772A JP2005522044A (en) 2002-04-03 2003-03-14 Synthetic ferrimagnetic sense layer for high density MRAM applications
AU2003225795A AU2003225795A1 (en) 2002-04-03 2003-03-14 Synthetic-ferrimagnet sense-layer for high density mram applications

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/114,249 US6728132B2 (en) 2002-04-03 2002-04-03 Synthetic-ferrimagnet sense-layer for high density MRAM applications
US10/114,249 2002-04-03

Publications (2)

Publication Number Publication Date
WO2003085674A2 WO2003085674A2 (en) 2003-10-16
WO2003085674A3 true WO2003085674A3 (en) 2004-02-12

Family

ID=28673684

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/007843 WO2003085674A2 (en) 2002-04-03 2003-03-14 Synthetic-ferrimagnet sense-layer for high density mram applications

Country Status (10)

Country Link
US (2) US6728132B2 (en)
EP (2) EP1490877B1 (en)
JP (1) JP2005522044A (en)
KR (1) KR100624762B1 (en)
CN (1) CN100576344C (en)
AT (1) ATE421756T1 (en)
AU (1) AU2003225795A1 (en)
DE (1) DE60325948D1 (en)
TW (1) TWI287871B (en)
WO (1) WO2003085674A2 (en)

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US7054118B2 (en) * 2002-03-28 2006-05-30 Nve Corporation Superparamagnetic field sensing devices
US6724652B2 (en) * 2002-05-02 2004-04-20 Micron Technology, Inc. Low remanence flux concentrator for MRAM devices
US6885576B2 (en) * 2002-08-13 2005-04-26 Micron Technology, Inc. Closed flux magnetic memory
JP2004111437A (en) * 2002-09-13 2004-04-08 Toshiba Corp Magnetic storage device
JP2004179483A (en) * 2002-11-28 2004-06-24 Hitachi Ltd Nonvolatile magnetic memory
US7002228B2 (en) 2003-02-18 2006-02-21 Micron Technology, Inc. Diffusion barrier for improving the thermal stability of MRAM devices
US7020009B2 (en) * 2003-05-14 2006-03-28 Macronix International Co., Ltd. Bistable magnetic device using soft magnetic intermediary material
US6865105B1 (en) * 2003-09-22 2005-03-08 Hewlett-Packard Development Company, L.P. Thermal-assisted switching array configuration for MRAM
US7310265B2 (en) 2003-10-14 2007-12-18 Agency For Science, Technology And Research Magnetic memory device
US7045838B2 (en) * 2003-10-31 2006-05-16 International Business Machines Corporation Techniques for coupling in semiconductor devices and magnetic device using these techniques
US7053430B2 (en) * 2003-11-12 2006-05-30 Honeywell International Inc. Antiferromagnetic stabilized storage layers in GMRAM storage devices
US7602000B2 (en) * 2003-11-19 2009-10-13 International Business Machines Corporation Spin-current switched magnetic memory element suitable for circuit integration and method of fabricating the memory element
US7072209B2 (en) * 2003-12-29 2006-07-04 Micron Technology, Inc. Magnetic memory having synthetic antiferromagnetic pinned layer
US7105372B2 (en) * 2004-01-20 2006-09-12 Headway Technologies, Inc. Magnetic tunneling junction film structure with process determined in-plane magnetic anisotropy
US7183893B2 (en) * 2004-02-04 2007-02-27 Seagate Technology Llc TMR sensor with oxidized alloy barrier layer and method for forming the same
TWI283477B (en) * 2004-11-16 2007-07-01 Ind Tech Res Inst Magnetic random access memory with lower switching field
TWI278989B (en) * 2004-12-29 2007-04-11 Ind Tech Res Inst Magnetic random access memory with lower switching field through indirect exchange coupling
TWI277761B (en) * 2006-03-20 2007-04-01 Univ Nat Yunlin Sci & Tech Method for measuring hysteresis curve and anisotropic energy of magnetic memory units
US8300456B2 (en) * 2006-12-06 2012-10-30 Nec Corporation Magnetic random access memory and method of manufacturing the same
US7486551B1 (en) * 2007-04-03 2009-02-03 Grandis, Inc. Method and system for providing domain wall assisted switching of magnetic elements and magnetic memories using such magnetic elements
CN102270736B (en) * 2010-06-01 2014-02-05 中国科学院物理研究所 Magnetic nano-multilayer film used for magnetic sensor and manufacturing method for magnetic nano-multilayer film
JP5786341B2 (en) * 2010-09-06 2015-09-30 ソニー株式会社 Memory element and memory device
JP2012209358A (en) * 2011-03-29 2012-10-25 Renesas Electronics Corp Magnetic storage element and magnetic storage device
EP2775480B1 (en) * 2013-03-07 2018-11-14 Crocus Technology S.A. Self-referenced TAS-MRAM cell that can be read with reduced power consumption
EP3104187A1 (en) * 2015-06-09 2016-12-14 International Iberian Nanotechnology Laboratory Magnetoresistive sensor
KR102433703B1 (en) * 2015-11-30 2022-08-19 에스케이하이닉스 주식회사 Electronic device

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Also Published As

Publication number Publication date
TW200306004A (en) 2003-11-01
JP2005522044A (en) 2005-07-21
TWI287871B (en) 2007-10-01
ATE421756T1 (en) 2009-02-15
KR100624762B1 (en) 2006-09-19
CN1647208A (en) 2005-07-27
DE60325948D1 (en) 2009-03-12
EP2053613A1 (en) 2009-04-29
US20030189842A1 (en) 2003-10-09
EP1490877B1 (en) 2009-01-21
US6946302B2 (en) 2005-09-20
EP1490877A2 (en) 2004-12-29
KR20040101391A (en) 2004-12-02
CN100576344C (en) 2009-12-30
AU2003225795A8 (en) 2003-10-20
US20040152218A1 (en) 2004-08-05
US6728132B2 (en) 2004-04-27
AU2003225795A1 (en) 2003-10-20
WO2003085674A2 (en) 2003-10-16

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