Effect of the Electric Field on Partially Deuterated TGSe

• Published in: Ferroelectrics 2006-08, Vol.337 (1), p.41-49
• Main Authors: Romero, F. J., Gallardo, M. C., Martín-Olalla, J. M., Czarnecka, A., Koralewski, M., Del Cerro, J.
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectrics, piezoelectrics, and ferroelectrics and their properties; DTGSe; electric field; Exact sciences and technology; Ferroelectricity and antiferroelectricity; kinetics; latent heat; Phase transitions and curie point; Physics; specific heat
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150190600715863

Using the SMDTA technique, thermal properties and kinetics of the ferroelectric phase transition in a highly deuterated triglycine selenate sample have been studied under electric field E. For E = 0 and due to an internal break in the sample, the transition is carried out in two stages whose temperatures differ in about 0.1 K. The specific heat follows the Landau theory predictions even in the coexistence interval. The latent heat has been evaluated to be 1.32 Jg −1 on cooling and 1.08 Jg −1 on heating for E = 0. The different values on heating and on cooling for E = 0 are explained in terms of thermal hysteresis. The specific heat, the latent heat and the kinetics of the transformation have investigated for E = 800 Vcm −1 . The latent heat under this field is found to be 1.25 Jg −1 on cooling and 0.65 Jg −1 on heating.