Holdings: Multiscale multimodel simulation of micromagnetic singularities

Multiscale multimodel simulation of micromagnetic singularities:

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Bibliographic Details
Main Author:	Andreas, Christian (Author)
Format:	Thesis Book
Language:	German
Published:	Jülich Forschungszentrum Jülich, Zentralbibliothek 2014
Series:	Schriften des Forschungszentrums Jülich Reihe Schlüsseltechnologien ; 88
Subjects:	Ferromagnetikum Mehrskalenanalyse Multiphysics Mikromagnetismus Hochschulschrift
Online Access:	Inhaltstext Inhaltsverzeichnis
Physical Description:	XIX, 188 Seiten Illustrationen, Diagramme 24 cm
ISBN:	9783893369836

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MARC


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adam_text	CONTENTS 1 MOTIVATION 1 PART I. THEORY 2 FUNDAMENTALS OF MICROMAGNETISM AND THE HEISENBERG MODEL 9 2.1 CLASSICAL HEISENBERG MODEL 10 2.1.1 EXCHANGE INTERACTION 11 2.1.2 ZEEMAN ENERGY 11 2.1.3 MAGNETOSTATIC ENERGY 12 2.2 MICROMAGNETIC ENERGY CONTRIBUTIONS 14 2.2.1 EXCHANGE ENERGY 15 2.2.2 ZEEMAN ENERGY 19 2.2.3 DEMAGNETIZING ENERGY 19 2.2.4 ANISOTROPICS 22 2.3 DYNAMICS OF MAGNETIZATION AND MAGNETIC MOMENTS 23 2.3.1 EFFECTIVE FIELD 23 2.3.2 LANDAU-LIFSHITZ-GILBERT EQUATION 25 3 BASIC MICROMAGNETIC STRUCTURES 27 3.1 DOMAIN WALLS 27 3.1.1 BLOCH WALL 28 3.1.2 N6EL WALL 29 3.1.3 HEAD-TO-HEAD DOMAIN WALL 30 3.2 VORTICES 31 3.3 BLOCH POINTS 32 4 ANALYTIC TREATMENT OF BLOCH POINTS 35 4.1 PONTRYAGIN INDEX 37 4.2 MICROMAGNETIC BLOCH POINT EXCHANGE ENERGY DENSITY 38 4.3 DEMAGNETIZING ENERGY 39 4.4 EQUILIBRIUM BLOCH POINT ANGLE Y 41 4.5 BLOCH POINT PROPAGATION * A SIMPLE MODEL 42 4.6 SUMMARY 45 XVII HTTP://D-NB.INFO/1058377450 PART II. NUMERICS 5 FINITE ELEMENT METHOD 49 5.1 MATHEMATICAL OVERVIEW OF FEM 50 5.1.1 SIMPLEX ELEMENTS 50 5.1.2 SHAPE FUNCTIONS 51 5.1.3 SPATIAL DIFFERENTIATION 51 5.1.4 SPATIAL INTEGRATION 53 5.1.5 LAPLACE OPERATOR 53 5.1.6 DEMAGNETIZATION POTENTIAL 58 5.1.7 SPARSE MATRICES 61 5.2 MAPPING BETWEEN FINITE ELEMENT MESHES 64 5.3 MESH GENERATION 66 6 IMPLEMENTATION 67 6.1 SAMPLE 68 6.2 MULTI-MODEL SPHERE 69 6.2.1 CORE REGION 70 6.2.2 COARSENING 72 6.3 CALOTTES 74 6.4 SYNCHRONIZATION 76 6.5 TIME INTEGRATION OF THE EQUATION OF MOTION 78 6.5.1 TIME INTEGRATOR ROUTINE 81 6.5.2 PROPAGATION 82 6.5.3 MULTI-MODEL SPHERES FOR (POTENTIAL) BLOCH POINTS 82 6.6 EXECUTION PIPELINE 84 7 NUMERICAL STABILITY TESTS 87 7.1 ABRUPT MESH TRANSITIONS 87 7.2 ENERGY ARTIFACTS OF MULTIPLE STRUCTURES 91 PART III. NUMERICAL RESULTS 8 BLOCH POINTS IN NANOWIRES 95 8.1 SPIN WAVE DISPERSION RELATION 96 9 EQUILIBRIUM BLOCH POINT CONFIGURATION 101 10 DEPINNING OF BLOCH POINTS 105 10.1 DIFFERENCES BETWEEN N.N. AND FE-LIKE EXCHANGE INTERACTION IN THE DY NAMIC REGIME 107 11 CHIRALITIES OF VORTEX DOMAIN WALLS 109 XVIII 12 BAD CHIRALITY BLOCH POINTS 113 12.1 LOW FIELD REGIME 113 12.2 WALKER BREAKDOWN OF VORTEX DOMAIN WALLS 117 12.2.1 DETAILS OF THE WALKER BREAKDOWN PROCESS 118 12.2.2 WALKER BREAKDOWN FROM A TOPOLOGICAL POINT OF VIEW 121 12.3 CHIRALITY CHANGE 124 12.4 SUMMARY 124 13 GOOD CHIRALITY BLOCH POINTS 127 13.1 SUBMAGNONIC PROPAGATION 129 13.2 LAMINAR SUPERMAGNONIC PROPAGATION 132 13.3 OSCILLATORY SUPERMAGNONIC PROPAGATION 133 13.4 TURBULENT BLOCH POINT PROPAGATION 136 13.5 SUMMARY 139 14 BLOCH POINT POSITIONS INSIDE OF THE LATTICE 141 15 CONCLUSION 145 APPENDIX LIST OF ABBREVIATIONS 151 ENGLISH RESUME 163 REFERENCES 173 PUBLICATIONS 185 ACKNOWLEDGMENT 187 XIX
any_adam_object	1
author	Andreas, Christian
author_facet	Andreas, Christian
author_role	aut
author_sort	Andreas, Christian
author_variant	c a ca
building	Verbundindex
bvnumber	BV042091954
ctrlnum	(OCoLC)891570807 (DE-599)DNB1058377450
dewey-full	538.3
dewey-hundreds	500 - Natural sciences and mathematics
dewey-ones	538 - Magnetism
dewey-raw	538.3
dewey-search	538.3
dewey-sort	3538.3
dewey-tens	530 - Physics
discipline	Physik Allgemeine Naturwissenschaft
format	Thesis Book
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physical	XIX, 188 Seiten Illustrationen, Diagramme 24 cm
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series2	Schriften des Forschungszentrums Jülich : Reihe Schlüsseltechnologien
spelling	Andreas, Christian Verfasser aut Multiscale multimodel simulation of micromagnetic singularities Christian Andreas Jülich Forschungszentrum Jülich, Zentralbibliothek 2014 XIX, 188 Seiten Illustrationen, Diagramme 24 cm txt rdacontent n rdamedia nc rdacarrier Schriften des Forschungszentrums Jülich : Reihe Schlüsseltechnologien 88 Dissertation Universität Duisburg-Essen 2014 Ferromagnetikum (DE-588)4154129-7 gnd rswk-swf Mehrskalenanalyse (DE-588)4416235-2 gnd rswk-swf Multiphysics (DE-588)7675978-7 gnd rswk-swf Mikromagnetismus (DE-588)4606688-3 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Ferromagnetikum (DE-588)4154129-7 s Mikromagnetismus (DE-588)4606688-3 s Multiphysics (DE-588)7675978-7 s Mehrskalenanalyse (DE-588)4416235-2 s DE-604 Schriften des Forschungszentrums Jülich Reihe Schlüsseltechnologien ; 88 (DE-604)BV023237997 88 X:MVB text/html http://deposit.dnb.de/cgi-bin/dokserv?id=4774025&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=027532795&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis
spellingShingle	Andreas, Christian Multiscale multimodel simulation of micromagnetic singularities Schriften des Forschungszentrums Jülich Ferromagnetikum (DE-588)4154129-7 gnd Mehrskalenanalyse (DE-588)4416235-2 gnd Multiphysics (DE-588)7675978-7 gnd Mikromagnetismus (DE-588)4606688-3 gnd
subject_GND	(DE-588)4154129-7 (DE-588)4416235-2 (DE-588)7675978-7 (DE-588)4606688-3 (DE-588)4113937-9
title	Multiscale multimodel simulation of micromagnetic singularities
title_auth	Multiscale multimodel simulation of micromagnetic singularities
title_exact_search	Multiscale multimodel simulation of micromagnetic singularities
title_full	Multiscale multimodel simulation of micromagnetic singularities Christian Andreas
title_fullStr	Multiscale multimodel simulation of micromagnetic singularities Christian Andreas
title_full_unstemmed	Multiscale multimodel simulation of micromagnetic singularities Christian Andreas
title_short	Multiscale multimodel simulation of micromagnetic singularities
title_sort	multiscale multimodel simulation of micromagnetic singularities
topic	Ferromagnetikum (DE-588)4154129-7 gnd Mehrskalenanalyse (DE-588)4416235-2 gnd Multiphysics (DE-588)7675978-7 gnd Mikromagnetismus (DE-588)4606688-3 gnd
topic_facet	Ferromagnetikum Mehrskalenanalyse Multiphysics Mikromagnetismus Hochschulschrift
url	http://deposit.dnb.de/cgi-bin/dokserv?id=4774025&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=027532795&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
volume_link	(DE-604)BV023237997
work_keys_str_mv	AT andreaschristian multiscalemultimodelsimulationofmicromagneticsingularities

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