Magnetic relaxation in a classical spin chain

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HINZKE, Denise, Ulrich NOWAK, 2000. Magnetic relaxation in a classical spin chain. In: Physical Review B. 61(10), pp. 6734-6740. Available under: doi: 10.1103/PhysRevB.61.6734

@article{Hinzke2000Magne-5176, title={Magnetic relaxation in a classical spin chain}, year={2000}, doi={10.1103/PhysRevB.61.6734}, number={10}, volume={61}, journal={Physical Review B}, pages={6734--6740}, author={Hinzke, Denise and Nowak, Ulrich} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:creator>Hinzke, Denise</dc:creator> <dcterms:issued>2000</dcterms:issued> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dspace:isPartOfCollection rdf:resource=""/> <dc:language>eng</dc:language> <dc:format>application/pdf</dc:format> <dcterms:abstract xml:lang="eng">With decreasing particle size, different mechanisms dominate the thermally activated magnetization reversal in ferromagnetic particles. We investigate some of these mechanisms for the case of a classical Heisenberg spin chain driven by an external magnetic field. For sufficiently small system size the magnetic moments rotate coherently. With increasing size a crossover to a reversal due to soliton-antisoliton nucleation sets in. For even larger systems many of these soliton-antisoliton pairs nucleate at the same time. These effects give rise to a complex size dependence of the energy barriers and characteristic time scales of the relaxation. We study these quantities using Monte Carlo simulations as well as a direct integration of the Landau-Lifshitz-Gilbert equation of motion with Langevin dynamics and we compare our results with asymptotic solutions for the escape rate following from the Fokker-Planck equation. Also, we investigate the crossover from coherent rotation to soliton-antisoliton nucleation and multidroplet nucleation, especially its dependence on the system size, the external field, and the anisotropy of the system.</dcterms:abstract> <dcterms:hasPart rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dcterms:available rdf:datatype="">2011-03-24T14:53:46Z</dcterms:available> <bibo:uri rdf:resource=""/> <dc:contributor>Hinzke, Denise</dc:contributor> <dc:creator>Nowak, Ulrich</dc:creator> <dcterms:bibliographicCitation>First publ. in: Physical Review B 61 (2000), 10, pp. 6734-6740</dcterms:bibliographicCitation> <dc:contributor>Nowak, Ulrich</dc:contributor> <dcterms:rights rdf:resource=""/> <dspace:hasBitstream rdf:resource=""/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:rights>terms-of-use</dc:rights> <dc:date rdf:datatype="">2011-03-24T14:53:46Z</dc:date> <dcterms:title>Magnetic relaxation in a classical spin chain</dcterms:title> </rdf:Description> </rdf:RDF>

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