Linyu, GanRomero Landa, Francisco JavierFranco García, VictorinoMartín Olalla, José MaríaGallardo Cruz, María del CarmenSalje, Ekhard K.H.Zhou, YumeiAktas, Oktay2019-11-182019-11-182019-10-18Linyu, G., Romero Landa, F.J., Franco García, V., Martín Olalla, J.M., Gallardo Cruz, M.d.C., Salje, E.K.H.,...,Aktas, O. (2019). Correlations between Elastic, Calorimetric, and Polar Properties of Ferroelectric PbSc0.5Ta0.5O3 (PST). Applied Physics Letters, 115, 161904.0003-6951https://hdl.handle.net/11441/90267Calorimetric, elastic, and polar properties of ferrolectric lead scandium tantalate PbSc0.5Ta0.5O3 (PST) with 65% cation order have been investigated in the vicinity of the paraelectric-ferroelectric transition at Ttrans = 295K. Comparison of temperature dependencies of the excess specific heat and elastic properties indicate that both anomalies stem from ther- mal fluctuations of order parameters in three dimensions. These fluctuations are consistent with tweed microstructure. This transition is driven by several coupled thermodynamic order parameters, as evidenced by a strongly non-linear scaling of the excess entropy with the squared ferroelectric polarization.application/pdfengAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/pst; calorimetry; polarization; entropy; landauinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1063/1.5116753