Ferroelectric phase transitions in cubic perovskites
نویسندگان
چکیده
منابع مشابه
Characterizing Phase Transitions in the Perovskites PbTi0
Perturbed-angular-correlation (PAC) spectroscopy was used to measure in ceramic samples of PbTi0 3 and B a T i 0 3 the temperature dependence of the Ti-site electric-field gradients (EFGs) at temperatures very close to the ferroelectric-to-paraelectric transition temperatures Tc. The samples were doped with small amounts of Hf that carried the 181 Hf — l 8 l Ta probe radioactivity. A highfreque...
متن کاملFirst-principles theory of ferroelectric phase transitions for perovskites: The case of BaTiO3.
We carry out a completely first-principles study of the ferroelectric phase transitions in BaTiO3. Our approach takes advantage of two features of these transitions: the structural changes are small, and only low-energy distortions are important. Based on these observations, we make systematically improvable approximations which enable the parameterization of the complicated energy surface. The...
متن کاملAdvances in Thermodynamics of Ferroelectric Phase Transitions
The thermodynamics of ferroelectric phase transitions is an important constituent part of the phenomenological theories of them, as well as the interface dynamics of them. In particular, if we confine the thermodynamics to the equilibrium range, we can say that the LandauDevonshire theory is a milestone in the process of the development of ferroelectric phase transition theories. This can be fo...
متن کاملPhase transitions in ferroelectric-paraelectric superlattices
Related Articles Modeling the switching kinetics in ferroelectrics J. Appl. Phys. 110, 114106 (2011) Ferroelectric phase transition and low-temperature dielectric relaxations in Sr4(La1xSmx)2Ti4Nb6O30 ceramics J. Appl. Phys. 110, 114101 (2011) Poling temperature tuned electric-field-induced ferroelectric to antiferroelectric phase transition in 0.89Bi0.5Na0.5TiO3-0.06BaTiO3-0.05K0.5Na0.5NbO3 ce...
متن کاملPhenomenological theories of ferroelectric phase transitions
parameter in the free energy expansion, phenomenological theory can also describe inhomogeneous structures appearPhenomenological theories for ferroelectrics are based ing in the ferroelectric phase transition, such as twins, on L andau–Devonshire type models, which can be conantiphase structures and domain walls. Here two examples structed based on thermodynamic principles and symwill be used ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2013
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/428/1/012026