Mechanical and dielectric response of pzt and tetragonal to monoclinic phase transition: i. Theory (2006).

Content Provider	CiteSeerX
Author	Hudak, O. Cordero, F. Craciun, F.
Abstract	The PZT material near the morphotropic phase boundary where a monoclinic phase was observed is studied in this paper. A theory of the tetragonal to monoclinic phase transition was developed within the Landau free energy approach. The order parameter is the electric polarization vector. The phase transition from the tetragonal to the monoclinic phase is of the first order near the second order. The tetragonal and monoclinic phases are described as equilibrium states within this theory. Dielectric response near the phase transition from the tetragonal to the monoclinic phase was studied for the crystal and for the ceramic and polycrystalline material taking into account the diagonal 33 and the off diagonal 31 components of susceptibility. The later diverges at temperature of stability boundary for the monoclinic phase, and it is zero in the tetragonal phase. Such a behavior is not observed in the effective dielectric static constant temperature dependence for ceramics and polycrystalline materials. We explain absence of a large contribution of the off diagonal susceptibility by a grain structure of the material and by percolation properties of this microcomposite. Above the
File Format	PDF
Publisher Date	2006-01-01
Access Restriction	Open
Subject Keyword	Monoclinic Phase Dielectric Response Monoclinic Phase Transition Phase Transition Polycrystalline Material Grain Structure Equilibrium State Later Diverges Diagonal Susceptibility First Order Electric Polarization Vector Order Parameter Stability Boundary Landau Free Energy Approach Pzt Material Second Order Morphotropic Phase Boundary Percolation Property Tetragonal Phase Large Contribution
Content Type	Text