Thermodynamic properties of a quasi-harmonic model for ferroelectric transitions

• Published in: Journal of physics. Condensed matter Vol. 23; no. 12; pp. 125902 - 12
• Main Authors: Mkam Tchouobiap, S E, Mashiyama, H
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 30.03.2011; Institute of Physics
• Subjects: Barriers; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Entropy; Exact sciences and technology; Ferroelectric materials; Ferroelectricity and antiferroelectricity; Mathematical analysis; Mathematical models; Phase transformations; Phase transitions and curie point; Physics; Thermodynamic properties; Thermodynamics; Specific heat; Ferroelectric transitions; Mean field approximation; Ferroelectricity; Phase transformations; Particle interactions; Numerical method; Thermodynamic properties; Quantum theory; Quantum fluctuation

Within a framework of a quasi-harmonic model for quantum particles in a local potential of the double Morse type and within the mean-field approximation for interactions between particles, we investigate the thermodynamic properties of ferroelectric materials. A quantum thermodynamic treatment gives...