Domain Processes in Ferroelectric Ceramics (2006)
This report outlines the progress achieved during a two year effort sponsored by the AFOSR on the theoretical study of domain and domain wall formation in ferroelectrics. Understanding on domain...
Domain Size Dependence of Piezoelectric Properties of Ferroelectrics (2004)
Ahluwalia, Rajeev, Lookman, Turab, Saxena, Avadh, Cao, Wenwu
The domain size dependence of piezoelectric properties of ferroelectrics is investigated using a continuum Ginzburg-Landau model that incorporates the long-range elastic and electrostatic...
Fang, Liang, Shen, Mingrong, Li, Zhenya, Cao, Wenwu
In this paper, impedance spectroscopy study was performed to establish the electrical property and microstructure relations of the as-deposited and post-annealed polycrystalline CCTO films prepared...
Electromechanical Properties of Multi-Domain Ferroelectrics (2003)
Ahluwalia, Rajeev, Lookman, Turab, Saxena, Avadh, Cao, Wenwu
We study theoretically the influence of the underlying domain microstructure on the electromechanical properties of ferroelectrics. Our calculations are based on a continuum approach that...
Fang, Liang, Shen, Mingrong, Cao, Wenwu
High-dielectric-constant CaCu3Ti4O12 (CCTO) thin films were prepared on Pt/Ti/SiO2/Si(100) substrates by pulsed-laser deposition. The 480 nm thick polycrystalline films have preferred orientation and...
The role of the surface during polarization switching in constrained ferroelectrics is investigated using the time-dependent Ginzburg-Landau theory. The model incorporates the elastic and...
Li, Shaoping, Cao, Wenwu, Cross, L. E.
The nonlinear electric and electromechanical responses of lead zirconate titanate Pb(Zr(x)Ti(1-x))O3 ceramics to an external ac electric field were measured under different driving levels. The onset...
Electric Fatigue in Lead Zirconate Titanate Ceramics. (1998)
Jiang, Qiyue, Cao, Wenwu, Cross, L. Eric
Electric fatigue is a major obstacle for some potential applications of ferroelectric materials based on reversals of spontaneous polarization, such as memory devices and high strain actuators. Our...
Cao, Wenwu, Zhang, Q. M., Cross, L. Eric
The static equilibrium conditions have been derived for piezoelectric-ceramic-polymer composite structures. Rigorous solutions are obtained for a 2-2 composite of lamellar configuration. Under a...