Abstract
The results of dielectric, thermal (AC calorimetry) and dilatometric measurements on DMAPcrystal in the ferroelectric phase transition region are presented. The experimental data arediscussed in the framework of the Landau theory, and expansion coefficients of the Landau potentialA0,B,C are estimated. A temperature dependence of the effective nonlinearity coefficientB has been revealed. Thepressure coefficient dTc/dp was obtained. The phase transition can be classified as a continuous oneand rather far from the tricritical point. The specific heat data show aλ-type anomaly and the value of the excess entropy is smaller than in typical order–disorderphase transitions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
