Multiscale modeling of magnetic materials: Temperature dependence of the exchange stiffness

Lade...
Vorschaubild
Dateien
Zu diesem Dokument gibt es keine Dateien.
Datum
2010
Autor:innen
Chubykalo-Fesenko, Oksana
Kachkachi, Hamid
Mryasov, Oleg N.
Evans, Richard Francis L.
Chantrell, Roy W.
Herausgeber:innen
Kontakt
ISSN der Zeitschrift
Electronic ISSN
ISBN
Bibliografische Daten
Verlag
Schriftenreihe
Auflagebezeichnung
ArXiv-ID
Internationale Patentnummer
Angaben zur Forschungsförderung
Projekt
Open Access-Veröffentlichung
Sammlungen
Core Facility der Universität Konstanz
Gesperrt bis
Titel in einer weiteren Sprache
Forschungsvorhaben
Organisationseinheiten
Zeitschriftenheft
Publikationstyp
Zeitschriftenartikel
Publikationsstatus
Published
Erschienen in
Physical Review B. 2010, 82(13), 134440. ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.82.134440
Zusammenfassung

For finite-temperature micromagnetic simulations the knowledge of the temperature dependence of the exchange stiffness plays a central role. We use two approaches for the calculation of the thermodynamic exchange parameter from spin models: (i) based on the domain-wall energy and (ii) based on the spin-wave dispersion. The corresponding analytical and numerical approaches are introduced and compared. A general theory for the temperature dependence and scaling of the exchange stiffness is developed using the classical spectral density method. The low-temperature exchange stiffness A is found to scale with magnetization as m1.66 for systems on a simple cubic lattice and as m1.76 for an FePt Hamiltonian parametrized through ab initio calculations. The additional reduction in the scaling exponent, as compared to the mean-field theory (A~ m2), comes from the nonlinear spin-wave effects.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
530 Physik
Schlagwörter
Konferenz
Rezension
undefined / . - undefined, undefined
Zitieren
ISO 690ATXITIA, Unai, Denise HINZKE, Oksana CHUBYKALO-FESENKO, Ulrich NOWAK, Hamid KACHKACHI, Oleg N. MRYASOV, Richard Francis L. EVANS, Roy W. CHANTRELL, 2010. Multiscale modeling of magnetic materials: Temperature dependence of the exchange stiffness. In: Physical Review B. 2010, 82(13), 134440. ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.82.134440
BibTex
@article{Atxitia2010Multi-943,
  year={2010},
  doi={10.1103/PhysRevB.82.134440},
  title={Multiscale modeling of magnetic materials: Temperature dependence of the exchange stiffness},
  number={13},
  volume={82},
  issn={1098-0121},
  journal={Physical Review B},
  author={Atxitia, Unai and Hinzke, Denise and Chubykalo-Fesenko, Oksana and Nowak, Ulrich and Kachkachi, Hamid and Mryasov, Oleg N. and Evans, Richard Francis L. and Chantrell, Roy W.},
  note={Article Number: 134440}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/943">
    <dc:contributor>Atxitia, Unai</dc:contributor>
    <dc:creator>Mryasov, Oleg N.</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-22T17:52:23Z</dc:date>
    <dcterms:abstract xml:lang="eng">For finite-temperature micromagnetic simulations the knowledge of the temperature dependence of the exchange stiffness plays a central role. We use two approaches for the calculation of the thermodynamic exchange parameter from spin models: (i) based on the domain-wall energy and (ii) based on the spin-wave dispersion. The corresponding analytical and numerical approaches are introduced and compared. A general theory for the temperature dependence and scaling of the exchange stiffness is developed using the classical spectral density method. The low-temperature exchange stiffness A is found to scale with magnetization as m1.66 for systems on a simple cubic lattice and as m1.76 for an FePt Hamiltonian parametrized through ab initio calculations. The additional reduction in the scaling exponent, as compared to the mean-field theory (A~ m2), comes from the nonlinear spin-wave effects.</dcterms:abstract>
    <dc:creator>Nowak, Ulrich</dc:creator>
    <dcterms:issued>2010</dcterms:issued>
    <dc:contributor>Kachkachi, Hamid</dc:contributor>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:language>eng</dc:language>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/943"/>
    <dc:creator>Chubykalo-Fesenko, Oksana</dc:creator>
    <dc:contributor>Mryasov, Oleg N.</dc:contributor>
    <dc:contributor>Chantrell, Roy W.</dc:contributor>
    <dcterms:title>Multiscale modeling of magnetic materials: Temperature dependence of the exchange stiffness</dcterms:title>
    <dcterms:bibliographicCitation>Publ. in: Physical Review B 82 (2010), 13, 134440</dcterms:bibliographicCitation>
    <dc:contributor>Nowak, Ulrich</dc:contributor>
    <dc:contributor>Hinzke, Denise</dc:contributor>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-22T17:52:23Z</dcterms:available>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:creator>Atxitia, Unai</dc:creator>
    <dc:rights>terms-of-use</dc:rights>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:creator>Hinzke, Denise</dc:creator>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:creator>Chantrell, Roy W.</dc:creator>
    <dc:creator>Kachkachi, Hamid</dc:creator>
    <dc:contributor>Chubykalo-Fesenko, Oksana</dc:contributor>
    <dc:contributor>Evans, Richard Francis L.</dc:contributor>
    <dc:creator>Evans, Richard Francis L.</dc:creator>
  </rdf:Description>
</rdf:RDF>
Interner Vermerk
xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter
Kontakt
URL der Originalveröffentl.
Prüfdatum der URL
Prüfungsdatum der Dissertation
Finanzierungsart
Kommentar zur Publikation
Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Ja
Begutachtet
Diese Publikation teilen