Phase coexistence in highly deuterated ferroelectric triglycine selenate: Landau description

Autor:	J. Del Cerro, F J Romero, María Carmen Gallardo
Přispěvatelé:	Universidad de Sevilla. Departamento de Física de la Materia Condensada, Ministerio de Educación y Ciencia (MEC). España
Rok vydání:	2006
Předmět:	Phase transition Materials science Condensed matter physics General Physics and Astronomy Thermodynamics Dielectric Selenate Ferroelectricity Curie's law chemistry.chemical_compound chemistry Deuterium Phase (matter) Latent heat
Zdroj:	idUS. Depósito de Investigación de la Universidad de Sevilla instname
ISSN:	1286-4854 0295-5075
DOI:	10.1209/epl/i2006-10348-5
Popis:	The phase transition in a 90% deuterated sample of TGSe has been investigated by calorimetric and dielectric measurements. As a consequence of the presence of an internal crack in the sample, the transition takes place in two stages separated by an interval where the paraelectric and the ferroelectric phases coexist without latent heat contribution. From the latent heat, the specific heat excess and the Curie law for the dielectric constant, it is shown that the transition follows a 2-4-6 Landau potential, whose coefficients are determined. This potential describes completely all the data, including those corresponding to the coexistence interval. Dirección General de Investigación Científica y Técnica (DGICYT) FIS2005-02444
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71af109d1ecf3bebcba94eb5643fb5ac https://doi.org/10.1209/epl/i2006-10348-5 Zobrazit plný text záznamu