Holdings: Ultrathin magnetic structures

Ultrathin magnetic structures: 4 Applications of nanomagnetism

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Bibliographic Details
Format:	Book
Language:	English
Published:	Berlin [u.a.] Springer 2005
Online Access:	Inhaltsverzeichnis
Physical Description:	XIV, 257 S. Ill., graph. Darst.
ISBN:	3540219544

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adam_text	B. HEINRICH * J.A.C. BLAND (EDS.) ULTRATHIN MAGNETIC STRUCTURES IV APPLICATIONS OF NANOMAGNETISM WITH 198 FIGURES, INCLUDING 117 IN COLOR SPRINGER CONTENTS 1 INTRODUCTION 1 2 MAGNETOELECTRONICS 5 2.1 BACKGROUND 5 2.2 COMMERCIALIZED APPLICATIONS 7 2.3 DEVELOPING TECHNOLOGY 7 , 2.4 FUTURE OPPORTUNITIES 14 2.5 CONCLUSION 17 REFERENCES 17 3 ELECTRICAL SPIN INJECTION INTO SEMICONDUCTORS 19 3.1 INTRODUCTION 19 - 3.2 DEVICE CONCEPTS 20 3.3 SPIN INJECTION FROM SEMIMAGNETIC SEMICONDUCTORS 26 3.4 SPIN INJECTION ACROSS AN AIR-EXPOSED SEMICONDUCTOR INTERFACE ... 29 3.5 ROLE OF INTERFACE STRUCTURE IN SPIN INJECTION 32 3.6 FERROMAGNETIC METALS AS SPIN INJECTING CONTACTS 38 3.7 CHARACTERISTICS OF THE FE/ALGAAS(001) INTERFACE 49 3.8 SUMMARY 53 REFERENCES 55 4 OPTICAL STUDIES OF ELECTRON SPIN TRANSMISSION 59 4.1 INTRODUCTION TO SPIN ELECTRONICS 59 4.1.1 CONCEPT 59 4.1.2 OPTICAL SPIN ORIENTATION IN GAAS 61 4.1.3 DEMONSTRATION OF OPTICAL SPIN INJECTION AND DETECTION ... 64 4.1.4 THEORETICAL ISSUES IN DESIGNING SPIN ELECTRONIC DEVICES .. 68 4.2 SPIN FILTERING EXPERIMENTS IN FERROMAGNET/ SEMICONDUCTOR HYBRID STRUCTURES 70 4.2.1 SPIN FILTERING 70 4.2.2 SPIN FILTERING USING PHOTOEXCITATION TECHNIQUES 72 VIII CONTENTS 4.2.3 SAMPLE PREPARATION 74 4.3 SPIN FILTERING IN FERROMAGNET/ SEMICONDUCTOR SCHOTTKY DIODES 75 4.3.1 APPLIED MAGNETIC FIELD DEPENDENCE 76 4.3.2 APPLIED BIAS DEPENDENCE 78 4.3.3 GAAS DOPING DENSITY DEPENDENCE 79 4.3.4 DEPENDENCE ON THE FERROMAGNETIC MATERIAL 80 4.4 SPIN FILTERING IN FERROMAGNET/ BARRIER LAYER/ SEMICONDUCTOR JUNCTIONS 80 4.4.1 ROLE OF BARRIER LAYER IN SPIN FILTERING 81 4.4.2 ELECTRICAL TRANSPORT ACROSS THE FERROMAGNET/SEMICONDUCTOR INTERFACE 81 4.4.3 SPIN DEPENDENT TRANSPORT ACROSS THE FERROMAGNET/SEMICONDUCTOR INTERFACE 83 4.4.4 SPIN FILTERING IN BAND GAP ENGINEERED FERROMAGNET/ALGAAS TUNNEL BARRIER/SEMICONDUCTOR STRUCTURES 84 4.5 BALLISTIC SPIN TRANSPORT IN SPIN VALVE STRUCTURES 88 4.5.1 SAMPLE CHARACTERISATION 89 4.5.2 OPTICAL MEASUREMENTS OF SPIN VALVE STRUCTURES 90 4.6 SUMMARY 96 REFERENCES 97 5 INTRODUCTION TO MICROMAGNETICS 101 5.1 FIRST SPIN AROUND THE TRACK 101 5.2 ONE ATOM OF IRON 102 5.2.1 ONE ATOM OF IRON IN SPACE 102 5.2.2 ONE IRON ATOM IN A NON-MAGNETIC LATTICE 105 5.2.3 A UNIT WITH TWO STABLE STATES AND TWO METASTABLE STATES . 114 5.2.4 EFFECT OF PLANAR GEOMETRY ON DYNAMICAL RESPONSE 125 5.3 NON-UNIFORM MAGNETIZATION 127 5.3.1 EXCHANGE ENERGY 127 5.3.2 MAGNETIC SURFACE CHARGE DENSITY 128 5.3.3 A VORTEX IN A CIRCULAR ULTRATHIN FILM 129 5.3.4 NON-UNIFORM STATES 134 5.3.5 A NON-UNIFORM SYSTEM WITH TWO-FOLD PLUS FOUR-FOLD ANISOTROPY 138 REFERENCES 148 6 SPIN VALVE GIANT MAGNETORESISTIVE SENSOR MATERIALS FOR HARD DISK DRIVES 149 6.1 INTRODUCTION 149 6.2 THE GMR EFFECT 153 6.3 A SIMPLE BUT POWERFUL MODEL 154 6.4 BIASING AND DEVICE PHYSICS 158 CONTENTS IX 6.5 ANTIFERROMAGNETS IN SPIN VALVES 159 6.6 MENAGERIE OF SPIN VALVE STRUCTURES 161 6.6.1 THE SIMPLE SPIN VALVE 161 6.6.2 THE NANOLAYERED SPIN VALVE 161 6.6.3 THE SPIN FILTER (OR BACKED) SPIN VALVE 161 6.6.4 DUAL SPIN VALVE 163 6.6.5 ANTIPARALLEL PINNED SPIN VALVES 164 6.6.6 AP-FREE LAYER SPIN VALVE 166 6.7 FUTURE DIRECTIONS 167 REFERENCES 174 MAGNETIC SWITCHING IN HIGH-DENSITY MRAM 177 7.1 RANDOM ACCESS MEMORIES (RAMS) 177 7.2 MAGNETORESISTIVE RANDOM ACCESS MEMORY (MRAM) 179 7.2.1 ANISOTROPIC MAGNETORESISTANCE-BASED MRAM 180 7.2.2 SPIN-VALVE MRAM 183 7.2.3 PSEUDO-SPIN-VALVE (PSV) MRAM 184 7.2.4 MAGNETIC TUNNEL JUNCTION (MTJ) MRAM 186 7.2.5 OTHER MRAM CONCEPTS 188 7.3 MRAM CELL SCALING 189 7.4 COHERENT ROTATION OF SINGLE-DOMAIN ELEMENTS 190 7.4.1 SINGLE-DOMAIN SIZE AND EXCHANGE LENGTHS 190 7.4.2 COHERENT ROTATION OF SINGLE-DOMAINS WITH UNIAXIAL ANISOTROPY 191 7.4.3 SWITCHING ASTROID 194 7.5 SWITCHING OF SUBMICRON MRAM DEVICES 196 7.5.1 SINGLE-DOMAIN-LIKE SWITCHING CHARACTERISTICS 196 7.5.2 SWITCHING IRREPRODUCIBILITY 199 7.5.3 HARD AXIS-LOOPS 201 7.5.4 DEVIATION FROM THE SW ASTROID 202 7.6 MICROMAGNETIC PROPERTIES OF SUBMICRON MRAM DEVICES 202 7.6.1 TRAPPED MAGNETIZATION VORTICES 204 7.6.2 EDGE-PINNING 207 7.6.3 360 C DOMAIN WALL 208 7.6.4 EFFECT OF ELEMENT SHAPE 209 7.7 ISSUES RELATED TO MAGNETIC SWITCHING IN FUTURE HIGH-DENSITY MRAM 210 7.7.1 INTERLAYER MAGNETOSTATIC COUPLING DUE TO END CHARGES ... 210 7.7.2 INTERLAYER NEEL COUPLING DUE TO INTERFACIAL CHARGES 212 7.7.3 INTER-ELEMENT MAGNETOSTATIC INTERACTION 213 7.7.4 SWITCHING FIELD DISTRIBUTION 214 7.7.5 THERMAL STABILITY 215 REFERENCES 215 X CONTENTS 8 GIANT MAGNETO-RESISTIVE RANDOM- ACCESS MEMORIES 219 8.1 INTRODUCTION 219 8.2 MAGNETIC PSEUDO-SPIN-VALVE DEVICE SWITCHING CHARACTERISTICS, MODELING, AND DISTRIBUTIONS 222 8.3 THE 1R0T GMRAM ARCHITECTURE 243 8.4 MAGNETIC SPIN-VALVE DEVICES FOR GMRAMS AND GMRAM LATCH ARCHITECTURES 246 8.5 NONVOLATILE MEMORY COMPARISONS AND POTENTIAL APPLICATIONS .... 248 8.6 CONCLUSIONS 250 REFERENCES 251 SUBJECT INDEX 253
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spelling	Ultrathin magnetic structures 4 Applications of nanomagnetism J. A. C. Bland ... (eds.) Berlin [u.a.] Springer 2005 XIV, 257 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Bland, J. Anthony C. 1958-2007 Sonstige (DE-588)136031463 oth (DE-604)BV009757277 4 GBV Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=013083411&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis
spellingShingle	Ultrathin magnetic structures
title	Ultrathin magnetic structures
title_auth	Ultrathin magnetic structures
title_exact_search	Ultrathin magnetic structures
title_full	Ultrathin magnetic structures 4 Applications of nanomagnetism J. A. C. Bland ... (eds.)
title_fullStr	Ultrathin magnetic structures 4 Applications of nanomagnetism J. A. C. Bland ... (eds.)
title_full_unstemmed	Ultrathin magnetic structures 4 Applications of nanomagnetism J. A. C. Bland ... (eds.)
title_short	Ultrathin magnetic structures
title_sort	ultrathin magnetic structures applications of nanomagnetism
url	http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=013083411&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
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