Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2012
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| Schlagworte: | |
| Online-Zugang: | Volltext https://nbn-resolving.org/urn:nbn:de:bvb:355-epub-284238 Inhaltsverzeichnis |
| Beschreibung: | Getr. Zählung Ill., graph. Darst. |
Internformat
MARC
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| 005 | 20131008 | ||
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| 245 | 1 | 0 | |a Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts |c vorgelegt von Andreas Einwanger |
| 264 | 1 | |c 2012 | |
| 300 | |a Getr. Zählung |b Ill., graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 502 | |a Regensburg, Univ., Diss., 2012 | ||
| 650 | 0 | 7 | |a Spin |0 (DE-588)4125988-9 |2 gnd |9 rswk-swf |
| 650 | 0 | 7 | |a Galliumarsenid |0 (DE-588)4019155-2 |2 gnd |9 rswk-swf |
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| 856 | 4 | |u https://nbn-resolving.org/urn:nbn:de:bvb:355-epub-284238 |x Resolving-System | |
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Datensatz im Suchindex
| _version_ | 1804150511956393984 |
|---|---|
| adam_text | IMAGE 1
CONTENTS
KEYWORDS V
1 INTRODUCTION 1
2 BASICS 7
2.1 ENERGY BAND MODEL OF SOLID STATE MATERIALS 8
2.2 SEMICONDUCTORS 12
2.2.1 INTRINSIC SEMICONDUCTORS 13
2.2.2 DOPED SEMICONDUCTORS 14
2.2.3 ESAKI DIODES 18
2.3 FABRICATION OF SEMICONDUCTORS 21
2.3.1 PRINCIPLE OF MBE GROWTH 22
2.3.2 LAYER GROWTH MONITORING 23
2.4 MAGNETISM 24
2.4.1 CLASSIFICATION OF MAGNETIC MATERIAL 25
2.4.2 ANISOTROPY 29
2.4.3 MAGNETORESISTIVITY 32
2.4.4 MAGNETIC DOMAINS 39
2.5 (GA,MN)AS, A FERROMAGNETIC SEMICONDUCTOR 39
2.5.1 CRYSTAL STRUCTURE 40
2.5.2 MAGNETIC AND ELECTRONIC PROPERTIES 42
3 SPIN THEORY 47
3.1 PARTICLE DRIFT AND DIFFUSION 47
3.2 SPIN DRIFT AND DIFFUSION 51
3.3 QUASICHEMICAL POTENTIALS [I AND 53
3.4 STANDARD MODEL OF SPIN INJECTION: F/N JUNCTIONS 57
3.4.1 FERROMAGNET 58
3.4.2 NONMAGNET 59
3.4.3 CONTACT 60
3.4.4 SPIN INJECTION AND SPIN EXTRACTION 60
3.4.5 THE EQUIVALENT CIRCUIT 61
HTTP://D-NB.INFO/1038401453
IMAGE 2
II CONTENTS
3.4.6 QUASICHEMICAL POTENTIALS, NONEQUILIBRIUM RESISTANCE AND SPIN
BOTTLENECK.... 62
3.4.7 TRANSPARENT CONTACT 64
3.5.8 TUNNEL CONTACTS 66
3.5.9 JOHNSON-SILSBEE SPIN CHARGE COUPLING 66
3.6 SPIN DYNAMICS 71
3.6.1 DRIFT DIFFUSION MODEL FOR SPIN DYNAMICS 71
3.6.2 HANLE EFFECT 72
3.7 SPIN RELAXATION 77
3.7.1 ELLIOT-YAFET (EY) MECHANISM * - *] 77
3.7.2 DYAKONOV-PEREL (DP) MECHANISM D Y AK I D J RAL 78
3.7.3 BIR-ARONOV-PIKUS (BAP) MECHANISM 8 78
3.7.4 HYPERFINE INTERACTION (HFI) WITH NUCLEAR SPINS 0 ? 2 78
4 WAFER MATERIAL AND SAMPLE PREPARATION 81
4.1 WAFER MATERIAL 81
4.2 WAFER PREPARATION 82
4.3 SAMPLE PREPARATION 83
4.3.1 CLEANING CASCADE 83
4.3.2 RESIST SPIN-COATING 83
4.3.3 LITHOGRAPHY 84
4.3.4 DEVELOPMENT 85
4.3.5 DEPOSITION OF METALLIZATION AND ISOLATORS 86
4.3.6 ETCHING 87
4.3.7 SAMPLE PREPARATION ROUNDUP 89
5 MEASUREMENT TECHNIQUES 91
5.1 CRYOSTAT SYSTEMS 91
5.2 MEASUREMENT SETUP 92
5.2.1 DC SETUP 93
5.2.2 AC SETUP 94
6. RESULTS AND DISCUSSION 97
6.11-V CURVES OF ESAKI DIODES (AND PN SIMULATION) 97
6.2 IN-PLANE MEASUREMENTS 101
6.2.1 NON-LOCAL SPIN-VALVES AND EXPONENTIAL DISTANCE DEPENDENCE 103
IMAGE 3
CONTENTS III
6.2.2 SPIN INJECTION AND SPIN EXTRACTION 106
6.2.3 ANGULAR DEPENDENCE OF THE SPIN-VALVE 107
6.2.4 DYNAMIC NUCLEAR POLARIZATION (DNP) EFFECTS 112
6.2.5 SPIN INJECTION EFFICIENCY 114
6.3 OUT-OF-PLANE MEASUREMENTS 116
6.3.1 HANLE MEASUREMENTS 117
6.3.2 HANLE SIGNAL DECOMPOSITION 120
6.3.3 ORIGIN OF THE SPIN-VALVE SIGNAL 121
6.4 TEMPERATURE DEPENDENT MEASUREMENTS 124
6.4.1 HANLE MEASUREMENTS 124
6.4.2 SPIN-VALVE MEASUREMENTS 126
6.5 TUNNELING ANISOTROPIC SPIN POLARIZATION (TASP) 126
6.6 MEASUREMENTS ON THICKER GAMNAS LAYERS 131
7. SUMMARY AND OUTLOOK 137
APPENDIX A: PREPARATION TECHNIQUES A
APPENDIX B: MEASUREMENTS Q
APPENDIX C: LIST OF PUBLICATIONS EE
REFERENCES A
ACKNOWLEDGEMENTS Q
|
| any_adam_object | 1 |
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| author_facet | Einwanger, Andreas |
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| dewey-ones | 537 - Electricity and electronics |
| dewey-raw | 537.622 |
| dewey-search | 537.622 |
| dewey-sort | 3537.622 |
| dewey-tens | 530 - Physics |
| discipline | Physik |
| format | Thesis Book |
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| indexdate | 2024-07-10T00:40:06Z |
| institution | BVB |
| language | English |
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| physical | Getr. Zählung Ill., graph. Darst. |
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| spelling | Einwanger, Andreas Verfasser aut Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts vorgelegt von Andreas Einwanger 2012 Getr. Zählung Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Regensburg, Univ., Diss., 2012 Spin (DE-588)4125988-9 gnd rswk-swf Galliumarsenid (DE-588)4019155-2 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Spin (DE-588)4125988-9 s Galliumarsenid (DE-588)4019155-2 s DE-604 Erscheint auch als Online-Ausgabe urn:nbn:de:bvb:355-epub-284238 http://epub.uni-regensburg.de/28423/ Verlag kostenfrei Volltext https://nbn-resolving.org/urn:nbn:de:bvb:355-epub-284238 Resolving-System DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026098779&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Einwanger, Andreas Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts Spin (DE-588)4125988-9 gnd Galliumarsenid (DE-588)4019155-2 gnd |
| subject_GND | (DE-588)4125988-9 (DE-588)4019155-2 (DE-588)4113937-9 |
| title | Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts |
| title_auth | Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts |
| title_exact_search | Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts |
| title_full | Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts vorgelegt von Andreas Einwanger |
| title_fullStr | Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts vorgelegt von Andreas Einwanger |
| title_full_unstemmed | Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts vorgelegt von Andreas Einwanger |
| title_short | Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts |
| title_sort | spin injection into gaas using ferromagnetic ga mn as contacts |
| topic | Spin (DE-588)4125988-9 gnd Galliumarsenid (DE-588)4019155-2 gnd |
| topic_facet | Spin Galliumarsenid Hochschulschrift |
| url | http://epub.uni-regensburg.de/28423/ https://nbn-resolving.org/urn:nbn:de:bvb:355-epub-284238 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026098779&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT einwangerandreas spininjectionintogaasusingferromagneticgamnascontacts |