Magnetic imaging of static and dynamic states in systems of reduced dimensions:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Aachen
Shaker
2015
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| Schriftenreihe: | Berichte aus der Physik
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| Schlagworte: | |
| Online-Zugang: | Inhaltstext Inhaltsverzeichnis |
| Beschreibung: | IV, 179 S. Ill., graph. Darst. |
| ISBN: | 9783844035230 |
Internformat
MARC
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| 245 | 1 | 0 | |a Magnetic imaging of static and dynamic states in systems of reduced dimensions |c Stefan Rößler |
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| 300 | |a IV, 179 S. |b Ill., graph. Darst. | ||
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| 653 | |a magnetic imaging | ||
| 653 | |a magnetic vortex cores | ||
| 653 | |a spin-transfer torque | ||
| 653 | |a SEMPA | ||
| 653 | |a time-resolved SEMPA | ||
| 653 | |a magnetic thin films | ||
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Datensatz im Suchindex
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CONTENTS
1 INTRODUCTION 1
2 MAGNETIC IMAGING 11
2.1 HISTORICAL OVERVIEW II
2.2 SCANNING ELECTRON MICROSCOPY WITH POLARIZATION ANALYSIS 13
2.2.1 MEASURING THE SPIN POLARIZATION OF SECONDARY ELECTRONS 14
2.2.2 SEMPA IMAGING WITH A LEED DETECTOR 16
2.2.3 SEMPA IN COMPARISON 23
3 SPIN-TRANSFER-TORQUE PARAMETERS FOR A MAGNETIC VORTEX CORE 25
3.1 MICROMAGNETICS 25
3.1.1 TORQUES AND ENERGIES IN MICROMAGNETICS 26
3.1.2 EFFECTIVE FIELD 27
3.1.3 DAMPING 30
3.1.4 SPIN-TRANSFER 31
3.1.5 SUMMARY 35
3.2 PREVIOUS EXPERIMENTAL WORK ON THE SPIN-TRANSFER-TORQUE PARAMETERS 36
3.3 USING A VORTEX CORE TO DETERMINE ALL SPIN-TRANSFER-TORQUE PARAMETERS
. 37
3.3.1 THEORETICAL APPROACH 39
3.3.2 MICROMAGNETIC SIMULATIONS OF THE CURRENT-INDUCED VORTEX CORE DIS
PLACEMENT 42
3.3.3 SAMPLE PREPARATION 44
3.4 VORTEX DISPLACEMENT IN IRON ALLOYS 48
3.5 VORTEX DISPLACEMENT IN PERMALLOY 51
3.5.1 SEMPA MEASUREMENTS 52
3.5.2 MATERIAL PROPERTIES OBTAINED BY FERROMAGNETIC RESONANCE 56
3.5.3 DETERMINATION OF ALL SPIN-TRANSFER-TORQUE PARAMETERS 59
3.5.4 EXPERIMENTAL SOURCES OF AN OERSTED FIELD 66
3.6 SUMMARY 71
4 TIME-RESOLVED MAGNETIC IMAGING 73
4.1 TIME-RESOLVED MAGNETIC IMAGING 73
4.1.1 PHOTON-BASED TECHNIQUES 73
4.1.2 ELECTRON-BASED TECHNIQUES 75
4.1.3 SCANNING PROBE TECHNIQUES 76
4.2 TIME-RESOLVED SEMPA 76
4.3 TECHNICAL IMPROVEMENT OF THE SETUP 78
III
HTTP://D-NB.INFO/106828269X
CONTENTS
4.4 TIME-RESOLVED MEASUREMENTS 80
4.4.1 TIME-RESOLVED SEM 82
4.4.2 TIME-RESOLVED SEMPA 83
4.5 SUMMARY AND OUTLOOK 90
5 INTERACTION BETWEEN FERROELECTRIC AND FERROMAGNETIC DOMAIN WALLS 93
5.1 CHARGED WALLS 95
5.2 UNCHARGED WALLS 100
5.2.1 DETERMINATION OF WALL WIDTH 100
5.2.2 EXPERIMENTAL BROADENING 102
5.2.3 WALL WIDTH IN THEORY AND EXPERIMENT 106
5.3 SUMMARY 107
6 UNIAXIAL ANISOTROPY OF A RIPPLED MAGNETIC FILM 109
6.1 MODEL SYSTEM AND POSSIBLE MAGNETIC CONFIGURATIONS I 10
6.2 STRAY FIELD ENERGY I 13
6.2.1 SURFACE AND VOLUME MAGNETIC CHARGES 113
6.2.2 FROM CHARGES TO ENERGY 117
6.3 EXCHANGE ENERGY 122
6.4 COMPARISON OF THE ENERGY CONTRIBUTIONS 124
6.5 COMPARISON OF MODEL VALUES TO EXPERIMENTAL DATA 127
6.5.1 PERMALLOY ON DIAMOND 127
6.5.2 COBALT ON MAGNESIUM OXIDE 128
6.5.3 PERMALLOY, COBALT, AND IRON ON SILICON 129
6.6 SUMMARY 133
7 APPENDIX 135
7.1 EVALUATION TOOLS FOR SEMPA DATA 135
7.1.1 DETERMINATION OF THE VORTEX CORE POSITION FROM SEMPA DATA 135
7.1.2 DETERMINATION OF POSITION AND ORIENTATION OF THE MAGNETIC
STRUCTURE . . 138
7.2 CORRECTION OF CURRENT DENSITY FOR PARASITIC SHUNT RESISTANCES 140
7.3 RAW DATA OF SEMPA IMAGES 142
REFERENCES 145
PUBLICATIONS 175
ACKNOWLEDGEMENT 177
SROESSLC@PHYSNCI.UNI-HAMBURG.DE
IV |
| any_adam_object | 1 |
| author | Rößler, Stefan |
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| author_facet | Rößler, Stefan |
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| bvnumber | BV042767656 |
| ctrlnum | (OCoLC)905366514 (DE-599)DNB106828269X |
| dewey-full | 538.4 530 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 538 - Magnetism 530 - Physics |
| dewey-raw | 538.4 530 |
| dewey-search | 538.4 530 |
| dewey-sort | 3538.4 |
| dewey-tens | 530 - Physics |
| discipline | Physik |
| format | Thesis Book |
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| indexdate | 2024-09-10T01:51:01Z |
| institution | BVB |
| isbn | 9783844035230 |
| language | English |
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| physical | IV, 179 S. Ill., graph. Darst. |
| publishDate | 2015 |
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| series2 | Berichte aus der Physik |
| spelling | Rößler, Stefan Verfasser (DE-588)1075562880 aut Magnetic imaging of static and dynamic states in systems of reduced dimensions Stefan Rößler Aachen Shaker 2015 IV, 179 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Berichte aus der Physik Zugl.: Hamburg, Univ., Diss., 2015 Spinpolarisation (DE-588)4182332-1 gnd rswk-swf Rasterelektronenmikroskopie (DE-588)4048455-5 gnd rswk-swf Nanostruktur (DE-588)4204530-7 gnd rswk-swf Magnetschicht (DE-588)4262876-3 gnd rswk-swf Mehrschichtsystem (DE-588)4244347-7 gnd rswk-swf magnetic imaging magnetic vortex cores spin-transfer torque SEMPA time-resolved SEMPA magnetic thin films (DE-588)4113937-9 Hochschulschrift gnd-content Magnetschicht (DE-588)4262876-3 s Mehrschichtsystem (DE-588)4244347-7 s Nanostruktur (DE-588)4204530-7 s Rasterelektronenmikroskopie (DE-588)4048455-5 s Spinpolarisation (DE-588)4182332-1 s DE-604 X:MVB text/html http://deposit.dnb.de/cgi-bin/dokserv?id=5174161&prov=M&dok_var=1&dok_ext=htm Inhaltstext DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028198040&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Rößler, Stefan Magnetic imaging of static and dynamic states in systems of reduced dimensions Spinpolarisation (DE-588)4182332-1 gnd Rasterelektronenmikroskopie (DE-588)4048455-5 gnd Nanostruktur (DE-588)4204530-7 gnd Magnetschicht (DE-588)4262876-3 gnd Mehrschichtsystem (DE-588)4244347-7 gnd |
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| title | Magnetic imaging of static and dynamic states in systems of reduced dimensions |
| title_auth | Magnetic imaging of static and dynamic states in systems of reduced dimensions |
| title_exact_search | Magnetic imaging of static and dynamic states in systems of reduced dimensions |
| title_full | Magnetic imaging of static and dynamic states in systems of reduced dimensions Stefan Rößler |
| title_fullStr | Magnetic imaging of static and dynamic states in systems of reduced dimensions Stefan Rößler |
| title_full_unstemmed | Magnetic imaging of static and dynamic states in systems of reduced dimensions Stefan Rößler |
| title_short | Magnetic imaging of static and dynamic states in systems of reduced dimensions |
| title_sort | magnetic imaging of static and dynamic states in systems of reduced dimensions |
| topic | Spinpolarisation (DE-588)4182332-1 gnd Rasterelektronenmikroskopie (DE-588)4048455-5 gnd Nanostruktur (DE-588)4204530-7 gnd Magnetschicht (DE-588)4262876-3 gnd Mehrschichtsystem (DE-588)4244347-7 gnd |
| topic_facet | Spinpolarisation Rasterelektronenmikroskopie Nanostruktur Magnetschicht Mehrschichtsystem Hochschulschrift |
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