The influence of an electric field on the latent heat of the ferroelectric phase transition in KDP

The specific heat, heat flux (DTA trace) and dielectric constant of KDP ferroelectric crystal have been measured simultaneously for various electric fields with a conduction calorimeter. The specific heat presents a strong anomaly, but these simultaneous measurements allow us to evaluate the latent...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Condensed matter 2005-05, Vol.17 (17), p.2645-2654
Main Authors: Delgado-Sanchez, Jose Maria, Martín-Olalla, José María, Gallardo, María Carmen, Ramos, Saturio, Koralewski, Marceli, del Cerro, Jaime
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Ferroelectricity and antiferroelectricity
Phase transitions and curie point
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The specific heat, heat flux (DTA trace) and dielectric constant of KDP ferroelectric crystal have been measured simultaneously for various electric fields with a conduction calorimeter. The specific heat presents a strong anomaly, but these simultaneous measurements allow us to evaluate the latent heat accurately. The latent heat decreases with field, and the value of the critical electric field-that where the latent heat disappears-is estimated to be (0.44 +/- 0.03) kV cm-1. Incidentally, we have measured simultaneously the dielectric permittivity, which suggests that latent heat is developed as domains are growing.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/17/17/012