Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Wiesbaden
Springer Spektrum
2012
|
| Schriftenreihe: | Research
|
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis Inhaltstext Inhaltsverzeichnis |
| Beschreibung: | XIV, 172 S. Ill., graph. Darst. |
| ISBN: | 9783834824226 3834824224 |
Internformat
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| 245 | 1 | 0 | |a Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance |c Franziska Hammerath |
| 264 | 1 | |a Wiesbaden |b Springer Spektrum |c 2012 | |
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Datensatz im Suchindex
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CONTENTS
FOREWORD VII
LIST OF FIGURES XIII
LIST OF TABLES XV
1 INTRODUCTION 1
2 BASIC PRINCIPLES OF NMR 3
2.1 ISOLATED NUCLEAR SPINS IN A MAGNETIC FIELD 4
2.1.1 A SINGLE NUCLEAR SPIN 4
2.1.2 MANY NUCLEAR SPINS 5
2.2 MAKING LIFE INTERESTING: INTERACTIONS 6
2.2.1 INTERACTIONS BETWEEN NUCLEAR SPINS - LINE SHAPE I 7
2.2.2 MAGNETIC HYPERFINE INTERACTIONS 8
2.2.3 ELECTRIC QUADRUPOLE INTERACTIONS 11
2.2.4 SUMMARY 16
2.3 DYNAMIC PROCESSES: RELAXATION 17
2.3.1 HOW TO MEASURE NUCLEAR MAGNETISM? 20
2.3.2 SPIN-LATTICE RELAXATION 22
2.3.2.1 SOURCES OF SPIN-LATTICE RELAXATION 22
2.3.2.2 INVERSION RECOVERY METHOD TO MEASURE T^
1
24
2.3.2.3 SPIN-LATTICE RELAXATION FUNCTIONS 24
2.3.2.4 KORRINGA RELATION 26
2.3.3 SPIN-SPIN RELAXATION 27
2.4 LINE SHAPE II 29
3 NMR IN THE
SUPERCONDUCTING STATE 31
3.1 KNIGHT SHIFT 31
3.1.1 SPIN SHIFT 31
3.1.2 ORBITAL SHIFT AND SPIN-ORBIT SCATTERING 32
3.1.3 DIAMAGNETIC SHIELDING 33
3.2 SPIN-LATTICE RELAXATION RATE 33
3.2.1 BCS COHERENCE FACTORS 33
3.2.2 BCS SPIN-LATTICE RELAXATION RATE 35
3.2.2.1 COMPARISON TO ULTRASONIC ATTENUATION 37
3.2.3 ABSENCE OF THE HEBEL-SLICHTER PEAK 38
3.2.4 WHAT TO EXPECT FOR PNICTIDES? 39
HTTP://D-NB.INFO/1021171751
X CONTENTS
4 IRON-BASED SUPERCONDUCTORS 41
4.1 GENERAL OVERVIEW 41
4.1.1 CRYSTAL STRUCTURE AND ELECTRONIC STRUCTURE 41
4.1.2 GROUND STATES AND PHASE DIAGRAMS 42
4.1.3 SYMMETRY OF THE SUPERCONDUCTING ORDER PARAMETER 44
4.2 BASIC PROPERTIES OF LAOI-XFJFEAS 47
4.3 BASIC PROPERTIES OF LIFEAS 50
5 EXPERIMENTAL SETUP 53
5.1 MAGNETS AND CRYOGENICS 53
5.2 ELECTRONIC MEASUREMENT EQUIPMENT 54
5.2.1 PROBES 54
5.2.2 MAIN ELEMENTS OF THE ELECTRONICS 55
5.3 SAMPLES 56
5.3.1 LAOI_
X
F
X
FEAS 56
5.3.2 LIFEAS 58
5.4 PROBLEMS AND IMPROVEMENTS 60
5.4.1 TEMPERATURE CONTROL 60
5.4.2 SAMPLE PROBE FOR THE 16T FIELD SWEEP MAGNET 62
5.4.3 SAMPLE HEATING 64
6 IMMR ON LAOI_
X
FXFEAS IN THE NORMAL STATE 67
6.1 KNIGHT SHIFT - STATIC SUSCEPTIBILITY 67
6.1.1 OPTIMALLY-DOPED
LAOO.GFO^FEAS
67
6.1.2 LAOO.GSFO.OOFEAS 74
6.1.3 DISCUSSION 75
6.1.4 SUMMARY 76
6.2 SPIN-LATTICE RELAXATION RATE - DYNAMICS 76
6.2.1 OPTIMALLY-DOPED
LAOO.GFO.IFEAS
77
6.2.2 UNDERDOPED LAOO.9OFO.O5FEAS 81
6.2.3 OVERALL DOPING DEPENDENCE - ROLE OF SPIN FLUCTUATIONS 82
6.2.3.1 QUALITATIVE DISCUSSION 82
6.2.3.2 QUANTITATIVE DISCUSSION 85
6.2.4 SUMMARY 91
6.3 KORRINGA RELATION 92
6.3.1 SUMMARY 96
7 NMR AND NQR ON LAOI-XFJFEAS IN THE
SUPERCONDUCTING STATE 97
7.1 SPIN-LATTICE RELAXATION RATE FOR X 0.05 97
7.2 THE EFFECT OF 'SMART' DEFICIENCIES: LAOO,9FO.IFEASI_J 102
7.3 SUMMARY 108
CONTENTS XI
8 NMR AND NQR
ON LIFEAS 111
8.1
75
AS-NQR ILL
8.2
75
AS-NMR 115
8.2.1 STATIC NMR PROPERTIES - LINEWIDTH AND KNIGHT SHIFT 115
8.2.2 DYNAMIC PROPERTIES - SPIN-LATTICE RELAXATION RATE 120
8.3 SUMMARY OF
7O
AS NQR AND NMR RESULTS 124
8.4
7
LI-NMR 125
8.5 SUMMARY OF
7
LI NMR RESULTS 130
9 CONCLUSIONS 131
A APPENDIX 135
A.L NMR POWDER SPECTRA 135
A.2 CALCULATION OF SPIN-LATTICE RELAXATION FUNCTIONS 139
A.3 STRETCHED EXPONENTIAL RELAXATION FUNCTION 143
A.4 SPIN DIFFUSION 147
BIBLIOGRAPHY 151
ACKNOWLEDGEMENT 171 |
| any_adam_object | 1 |
| author | Hammerath, Franziska |
| author_facet | Hammerath, Franziska |
| author_role | aut |
| author_sort | Hammerath, Franziska |
| author_variant | f h fh |
| building | Verbundindex |
| bvnumber | BV041089416 |
| ctrlnum | (OCoLC)819742707 (DE-599)DNB1021171751 |
| dewey-full | 537.623 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 537 - Electricity and electronics |
| dewey-raw | 537.623 |
| dewey-search | 537.623 |
| dewey-sort | 3537.623 |
| dewey-tens | 530 - Physics |
| discipline | Physik |
| format | Thesis Book |
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| id | DE-604.BV041089416 |
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| indexdate | 2024-08-03T00:43:46Z |
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| isbn | 9783834824226 3834824224 |
| language | English |
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| physical | XIV, 172 S. Ill., graph. Darst. |
| publishDate | 2012 |
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| spelling | Hammerath, Franziska Verfasser aut Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance Franziska Hammerath Wiesbaden Springer Spektrum 2012 XIV, 172 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Research Zugl.: Dresden, Techn. Univ., Diss., 2011 Eisenverbindungen (DE-588)4151629-1 gnd rswk-swf NMR-Spektroskopie (DE-588)4075421-2 gnd rswk-swf Supraleiter (DE-588)4184140-2 gnd rswk-swf Magnetische Eigenschaft (DE-588)4129002-1 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Eisenverbindungen (DE-588)4151629-1 s Supraleiter (DE-588)4184140-2 s Magnetische Eigenschaft (DE-588)4129002-1 s NMR-Spektroskopie (DE-588)4075421-2 s DE-604 Erscheint auch als Online-Ausgabe Magnetism and Superconductivity in Iron-based Superconductors as Probed by Nuclear Magnetic Resonance B:DE-101 application/pdf http://d-nb.info/1021171751/04 Inhaltsverzeichnis X:MVB text/html http://deposit.dnb.de/cgi-bin/dokserv?id=3999016&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=026066031&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Hammerath, Franziska Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance Eisenverbindungen (DE-588)4151629-1 gnd NMR-Spektroskopie (DE-588)4075421-2 gnd Supraleiter (DE-588)4184140-2 gnd Magnetische Eigenschaft (DE-588)4129002-1 gnd |
| subject_GND | (DE-588)4151629-1 (DE-588)4075421-2 (DE-588)4184140-2 (DE-588)4129002-1 (DE-588)4113937-9 |
| title | Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance |
| title_auth | Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance |
| title_exact_search | Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance |
| title_full | Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance Franziska Hammerath |
| title_fullStr | Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance Franziska Hammerath |
| title_full_unstemmed | Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance Franziska Hammerath |
| title_short | Magnetism and superconductivity in iron-based superconductors as probed by nuclear magnetic resonance |
| title_sort | magnetism and superconductivity in iron based superconductors as probed by nuclear magnetic resonance |
| topic | Eisenverbindungen (DE-588)4151629-1 gnd NMR-Spektroskopie (DE-588)4075421-2 gnd Supraleiter (DE-588)4184140-2 gnd Magnetische Eigenschaft (DE-588)4129002-1 gnd |
| topic_facet | Eisenverbindungen NMR-Spektroskopie Supraleiter Magnetische Eigenschaft Hochschulschrift |
| url | http://d-nb.info/1021171751/04 http://deposit.dnb.de/cgi-bin/dokserv?id=3999016&prov=M&dok_var=1&dok_ext=htm http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026066031&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT hammerathfranziska magnetismandsuperconductivityinironbasedsuperconductorsasprobedbynuclearmagneticresonance |
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