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DY: Fachverband Dynamik und Statistische Physik
DY 31: Poster: Statistical Physics
DY 31.4: Poster
Wednesday, March 20, 2024, 15:00–18:00, Poster C
Analysis of the Mpemba effect in magnetic systems — •Janett Prehl and Martin Weigel — Technische Universität Chemnitz, Chemnitz, Deutschland
The Mpemba effect, first discovered by Mpemba and Osborne for water [1], is observed when a hot sample cools faster than
an initially colder one, when both are refrigerated in the same
thermal reservoir.
During the last years this effect has also been found to take place in the general context of magnetic phase transitions of different orders.
Here, we investigate and discuss the occurrence of this non-equilibrium process for different ferromagnetic models exhibiting a phase transitions at a critical temperature Tc.
We aim to analyze how different initial temperatures, structural properties or updating dynamics influence the time behavior of quantities such as energy E or the average domain length l
in order to get a deeper insight in the occurring mechanism of the Mpemba effect for the systems under consideration.
[1] Mpemba, E.B. and Osborn, D.G., Phys. Educ. 4, 172 (1969)
Keywords: Mpemba effect; Spin models; Monte Carlo simulation; Phase transition; Non-equilibrium processes