Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Jülich
Forschungszentrum Jülich
2012
|
| Schriftenreihe: | Schriften des Forschungszentrums Jülich
Reihe Schlüsseltechnologien ; Bd. 43 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | 208 S. Ill., graph. Darst. 240 mm x 170 mm |
| ISBN: | 9783893367979 |
Internformat
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| 245 | 1 | 0 | |a Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets |c Zhendong Fu |
| 264 | 1 | |a Jülich |b Forschungszentrum Jülich |c 2012 | |
| 300 | |a 208 S. |b Ill., graph. Darst. |c 240 mm x 170 mm | ||
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Datensatz im Suchindex
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| adam_text | IMAGE 1
TABLE OF CONTENTS
LIST OF FIGURES
LIST OF TABLES
CHAPTER 1 INTRODUCTION 1
1.1 MOLECULAR MAGNETISM 2
1.1.1 MAGNETISM: FROM BULK TO MOLECULES 2
1.1.2 SLOW RELAXATION AND QUANTUM TUNNELING OF MAGNETIZATION 5
1.1.3 QUANTUM COHERENCE OF SMMS 8
1.1.4 NEUTRON SCATTERING OF MOLECULAR MAGNETS 10
1.2 GEOMETRICAL SPIN FRUSTRATION 13
1.2.1 GEOMETRICALLY FRUSTRATED LATTICES 13
1.2.2 GEOMETRICAL SPIN FRUSTRATION IN MOLECULAR MAGNETS 16
1.3 SCOPE OF THIS THESIS 19
CHAPTER 2 XVZ-DIFFERENCE METHOD WITH POLARIZED NEUTRONS 21
2.1 INTRODUCTION 22
2.2 THEORY OF XVZ-DIFFERENCE METHOD USING POLARIZED NEUTRONS 25
CHAPTER 3 GEOMETRICAL SPIN-FRUSTRATED MOLECULAR MAGNET {MO 72FE30} 31
3.1 INTRODUCTION 32
3.1.1 INTRODUCTION TO MOLECULAR MAGNET {MO 72FE3O} 32
3.1.2 THREE-SUBLATTICE SPIN MODEL AND QUANTUM ROTATIONAL BAND THEORY 33
3.1.3 MOTIVATION 37
3.2 MAGNETIC PROPERTIES OF {MO 72FE3O} 38
3.3 SPECIFIC HEAT OF {MO 72FE30} 41
3.4 INELASTIC NEUTRON SCATTERING OF {MO 72FE30} 53
3.5 DIFFUSE NEUTRON SCATTERING WITH POLARIZATION ANALYSIS ON {MO 72FE3O}
58
3.5.1 EXPERIMENTAL DETAILS 58
3.5.2 EXPERIMENTAL RESULTS 60
HTTP://D-NB.INFO/1026024757
IMAGE 2
3.5.3 THEORETICAL SIMULATIONS WITHIN THREE-SUBLATTIC SPIN MODEL 64
3.5.3.1 SPIN CORRELATIONS OF A SPECIFIC GROUND STATE OF {MO 72FE3O} ....
66
3.5.3.2 SPIN-PAIR CORRELATIONS BETWEEN SPINS IN THE SAME SUBLATTICE 69
3.5.3.3 SPIN-PAIR CORRELATIONS BETWEEN SPINS FROM TWO DIFFERENT
SUBLATTICES 70
3.5.3.4 NUMERICALLY-AVERAGED SPIN CORRELATIONS FOR {MO 72FE3O} 73
3.5.3.5 SIMPLIFIED METHOD TO SIMULATE THE SPIN CORRELATIONS 75
3.5.4 DISCUSSION 77
3.6 SUMMARY 78
CHAPTER 4 SINGLE-MOLECULE MAGNET {VI 5AS6} 81
4.1 INTRODUCTION TO {VI 5AS6} 82
4.1.1 THREE-SPIN APPROXIMATION OF {V 15AS6} 82
4.1.2 MOTIVATION 85
4.2 MAGNETIC PROPERTIES OF {V15AS6} 85
4.3 SPECIFIC HEAT OF {V 15AS6} 87
4.4 DIFFUSE NEUTRON SCATTERING WITH POLARIZATION ANALYSIS ON {VX 5AS6}
94
4.4.1 EXPERIMENTAL DETAILS 94
4.4.2 EXPERIMENTAL RESULTS AND DISCUSSION 94
4.5 SUMMARY 98
CHAPTER 5 SPIN-FRUSTRATED PYROCHLORE ANTIFERROMAGNET NA 3CO(C03)2CI 99
5.1 INTRODUCTION 100
5.1.1 BRIEF INTRODUCTION TO SPIN GLASSES AND PYROCHLORE MAGNETS 100
5.1.2 INTRODUCTION TO PYROCHLORE ANTIFERROMAGNET NA 3CO(C03)2CI 103
5.1.3 MOTIVATION 103
5.2 X-RAY POWDER DIFFRACTION OF NA3CO(CC 3) 2CI 105
5.3 MAGNETIC MEASUREMENTS OF NA3CO(C0 3)2CI 107
5.3.1 DC MAGNETIZATION 107
5.3.2 AC SUSCEPTIBILITY 115
5.4 SPECIFIC HEAT OF NA3CO(C0 3)2CI 119
5.5 NEUTRON POWDER DIFFRACTION OF NA 3CO(C03)2CI 124
IMAGE 3
5.6 POLARIZED NEUTRON SCATTERING OF NA 3CO(C03)2CI 135
5.6.1 EXPERIMENTAL DETAILS 135
5.6.2 EXPERIMENTAL RESULTS AND DISCUSSION 136
5.7 INELASTIC NEUTRON SCATTERING OF NA 3CO(C03)2CI 144
5.7.1 EXPERIMENTAL DETAILS 145
5.7.2 EXPERIMENTAL RESULTS AND DISCUSSION 146
5.8 SUMMARY 157
CHAPTER 6 CONCLUSIONS 163
APPENDICES 167
A. ABBREVIATIONS 168
B. EXAMPLE OF THE PCR FILE FOR RIETVELD REFINEMENT BY FULLPROF 169
C. METHODS AND INSTRUMENTS 172
BIBLIOGRAPHY 197
|
| any_adam_object | 1 |
| author | Fu, Zhendong |
| author_GND | (DE-588)1027360114 |
| author_facet | Fu, Zhendong |
| author_role | aut |
| author_sort | Fu, Zhendong |
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| building | Verbundindex |
| bvnumber | BV040590210 |
| ctrlnum | (OCoLC)820424413 (DE-599)DNB1026024757 |
| dewey-full | 538.4 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 538 - Magnetism |
| dewey-raw | 538.4 |
| dewey-search | 538.4 |
| dewey-sort | 3538.4 |
| dewey-tens | 530 - Physics |
| discipline | Physik Allgemeine Naturwissenschaft |
| format | Thesis Book |
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| id | DE-604.BV040590210 |
| illustrated | Illustrated |
| indexdate | 2024-07-10T00:26:48Z |
| institution | BVB |
| isbn | 9783893367979 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-025418166 |
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| physical | 208 S. Ill., graph. Darst. 240 mm x 170 mm |
| publishDate | 2012 |
| publishDateSearch | 2012 |
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| publisher | Forschungszentrum Jülich |
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| series | Schriften des Forschungszentrums Jülich |
| series2 | Schriften des Forschungszentrums Jülich : Reihe Schlüsseltechnologien |
| spelling | Fu, Zhendong Verfasser (DE-588)1027360114 aut Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets Zhendong Fu Jülich Forschungszentrum Jülich 2012 208 S. Ill., graph. Darst. 240 mm x 170 mm txt rdacontent n rdamedia nc rdacarrier Schriften des Forschungszentrums Jülich : Reihe Schlüsseltechnologien Bd. 43 Zugl.: Aachen, RWTH, Diss., 2011 (DE-588)4113937-9 Hochschulschrift gnd-content Schriften des Forschungszentrums Jülich Reihe Schlüsseltechnologien ; Bd. 43 (DE-604)BV023237997 43 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025418166&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Fu, Zhendong Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets Schriften des Forschungszentrums Jülich |
| subject_GND | (DE-588)4113937-9 |
| title | Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets |
| title_auth | Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets |
| title_exact_search | Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets |
| title_full | Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets Zhendong Fu |
| title_fullStr | Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets Zhendong Fu |
| title_full_unstemmed | Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets Zhendong Fu |
| title_short | Spin correlations and excitations in spin-frustrated molecular and molecule-based magnets |
| title_sort | spin correlations and excitations in spin frustrated molecular and molecule based magnets |
| topic_facet | Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025418166&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV023237997 |
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