Crossing the coexistence line at constant magnetization

Details Crossing the coexistence line at constant magnetization Crossing the coexistence line at constant magnetization

2000-11-07

arxiv.org/abs/cond-mat/0011116v2

J. Stat. Phys. 104, 971 (2001)

Physics

Condensed Matter

20 pages, 7 figures included, to appear in Journal of Statistical Physics

Scientific paper

Using Monte Carlo histogram methods, the microcanonical caloric curve is computed for the Ising model in two and three dimensions with fixed magnetization. Whereas the signatures of a first order phase transition are clearly visible for large systems, intriguing finite size effects are revealed for smaller system sizes. The behaviour of the caloric curve is studied in a systematic way. Furthermore, results for the thermal stability of three-dimensional droplets of minority spins inside the two-phase region are presented. The effect of the percolation transition on the stability of these droplets is discussed.

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