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DTSTART;TZID=Europe/Paris:20231205T140000
DTEND;TZID=Europe/Paris:20231205T153000
DTSTAMP:20260421T175256
CREATED:20231203T084910Z
LAST-MODIFIED:20231204T074817Z
UID:9411-1701784800-1701790200@fermi.univ-tlse3.fr
SUMMARY:Fluctuations in an Ising ferromagnet driven by a slowly oscillating field with a constant bias (Experiment+Simulation match). - (Gloria Buendía / LPT / Seminar). - 5/12/2023\, 14H
DESCRIPTION:Gloria Buendía  (Université Simón Bolívar\, Caracas\, Venezuela) \nSeminar LPT\, 5/12/2023\, 14H\, 3R1\, seminar room\, 3rd floor \nSummary :\nWe present a numerical and theoretical study that supports and explains experimental results on anomalous magnetization fluctuations observed in a uniaxial ferromagnetic film which is forced by an oscillating field to which is added a constant bias field. We perform numerical Monte Carlo simulations of a 2D kinetic Ising model and analyze the data using a droplet model of metastable decay. Our results clearly show that the experimental results are not due to any residual magnetostatic interactions. We find that the origin of the anomalous magnetization fluctuations are not a a critical phenomenon associated with a phase transition. Rather it is a stochastic-resonance phenomena that have no counterpart in the corresponding thermodynamic phase transition\, providing a reminder that the equivalence between the dynamical phase transition to an equilibrium phase transition is only valid near the critical region.
URL:https://fermi.univ-tlse3.fr/event/fluctuations-in-an-ising-ferromagnet-driven-by-a-slowly-oscillating-field-with-a-constant-bias-experimentsimulation-match-gloria-buendia-lpt-seminar-5-12-2023-14h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
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