Phase transition in compressible Ising systems at fixed volume

Details Phase transition in compressible Ising systems at fixed volume Phase transition in compressible Ising systems at fixed volume

2007-05-26

arxiv.org/abs/0705.3890v1

Physics

Condensed Matter

Materials Science

13 figures

Scientific paper

10.1103/PhysRevB.76.174427

Using a Ginzburg-Landau model, we study the phase transition behavior of compressible Ising systems at constant volume by varying the temperature $T$ and the applied magnetic field $h$. We show that two phases can coexist macroscopically in equilibrium within a closed region in the $T$-$h$ plane. It occurence is favored near tricriticality. We find a field-induced critical point, where the correlation length diverges, the difference of the coexisting two phases and the surface tension vanish, but the isothermal magnetic susceptibility does not diverge in the mean field theory. We also investigate phase ordering numerically.

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