F J Romero

TL;DR: In this paper, the authors used a Landau-type expression for the excess Gibbs free energy with A = 0.70 J, B = 31.22 J, C = 42.17 J, K and K. The closeness to the tricritical point is seen by B < C; all thermodynamic data between 85 K and could be described selfconsistently using this approach.

TL;DR: In this article, the authors describe a full analysis of the first-order diffusionless structural transition in Cu67.64Zn16.71Al15.65 is characterized by jerky propagation of phase fronts related to the appearance of avalanches.

TL;DR: In this article, the temperature evolution of the static order parameter of α-quartz and its soft-mode frequencies were determined at temperatures below 300 K. While these parameters follow classic Landau theory at higher temperatures, quantum saturation was found below room temperature with a characteristic quantum temperature of 187 K. No indication of any effect of strong mode-mode coupling on the saturation behaviour was observed.

TL;DR: The existence of temporal correlations during the intermittent dynamics of a thermally driven structural phase transition is studied in a Cu-Zn-Al alloy and both methods reveal the existence of event clusters equivalent to the Omori correlations between aftershocks in earthquakes.

TL;DR: In this article, a method for measuring changes of enthalpy to discriminate the contribution due to the latent heat from that due to temperature dependence of the specific heat near the transition point is presented.