Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/9830
Diffusionless first-order phase transitions in systems with frozen configurational degrees of freedom
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
We consider systems that can be described in terms of two kinds of degree of freedom. The corresponding ordering modes may, under certain conditions, be coupled to each other. We may thus assume that the primary ordering mode gives rise to a diffusionless first-order phase transition. The change of its thermodynamic properties as a function of the secondary-ordering-mode state is then analyzed. Two specific examples are discussed. First, we study a three-state Potts model in a binary system. Using mean-field techniques, we obtain the phase diagram and different properties of the system as a function of the distribution of atoms on the different lattice sites. In the second case, the properties of a displacive structural phase transition of martensitic type in a binary alloy are studied as a function of atomic order. Because of the directional character of the martensitic-transition mechanism, we find only a very weak dependence of the entropy on atomic order. Experimental results are found to be in quite good agreement with theoretical predictions.
Citació
Citació
PLANES VILA, Antoni, VIVES I SANTA-EULÀLIA, Eduard, CASTÁN I VIDAL, Maria teresa. Diffusionless first-order phase transitions in systems with frozen configurational degrees of freedom. _Physical Review B_. 1991. Vol. 44, núm. 13, pàgs. 6715-6722. [consulta: 20 de gener de 2026]. ISSN: 0163-1829. [Disponible a: https://hdl.handle.net/2445/9830]