Resolution-dependent mechanisms for bimodal switching-time distributions in simulated Fe nanopillars

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dc.creatorThompson, S. H.
dc.creatorBrown, G.
dc.creatorKuhnle, A.
dc.creatorRikvold, P. A.
dc.creatorNovotny, M. A.
dc.date2008-11-06
dc.date.accessioned2026-07-07T12:39:13Z
dc.date.available2026-07-07T12:39:13Z
dc.descriptionWe study the magnetization-switching statistics following reversal of the applied field for three separate computational models representing the same physical system, an iron nanopillar. The primary difference between the models is the resolution of the computational lattice and, consequently, the intrinsic parameters that must be rescaled to retain similarity to the physical system. Considering the first-passage time to zero for the magnetization component in the longitudinal (easy-axis) direction, we look for applied fields that result in bimodal distributions of this time for each system and compare the results to the experimental system. We observe that the relevant fluctuations leading to bimodal distributions are different for each lattice resolution and result in magnetization-switching behavior that is unique to each computational model. Correct model resolution is thus essential for obtaining reliable numerical results for the system dynamics.
dc.description21 pages, 9 figures (color)
dc.identifierhttps://arxiv.org/abs/0811.1028
dc.identifierhttp://arxiv.org/abs/0811.1028
dc.identifierPhysical Review B 79 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.024429
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219033
dc.subjectMaterials Science
dc.subjectStatistical Mechanics
dc.titleResolution-dependent mechanisms for bimodal switching-time distributions in simulated Fe nanopillars
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