Temperature dependence surface structure of BaTiO3 thin films induced by ferroelectric phase transition

2008 ◽  
Vol 103 (5) ◽  
pp. 054109
Author(s):  
X. L. Li ◽  
H. B. Lu ◽  
Ming Li ◽  
Zhenhong Mai ◽  
Hyunjung Kim
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Temperature Dependence ◽  
Surface Structure ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase

Origin of ferroelectric phase transition in SbSClxI1-x mixed crystals

2014 ◽  
Vol 28 (30) ◽  
pp. 1450209 ◽  
Author(s):  
A. Audzijonis ◽  
L. Žigas ◽  
R. Sereika ◽  
R. Žaltauskas
Keyword(s):  
Phase Transition ◽  
Free Energy ◽  
Temperature Dependence ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Harmonic Approximation ◽  
Temperature Dependent ◽  
Normal Coordinate ◽  
Unit Cell Parameters ◽  
Cell Parameters

The measurements of SbSCl x I 1-x(x = 0.2) temperature dependent capacitance were carried out. The temperature of ferroelectric phase transition TC ≈340 K was measured experimentally. TC of SbSCl x I 1-x was calculated theoretically in anharmonic and harmonic approximations. TC was calculated in anharmonic approximation using temperature dependence of mean potential energy of Sb atoms as a function of the soft B1u symmetry normal coordinate along c(z)-axis. Moreover, TC was calculated in harmonic approximation using temperature dependence of vibrational thermodynamic functions (Helmholc free energy). TC dependence from unit cell parameters a, b and from mixture composition x was carried out.

Modeling of High-Signal Electrostriction. II

1990 ◽  
Vol 45 (9-10) ◽  
pp. 1095-1101
Author(s):  
J von Cieminski
Keyword(s):  
Phase Transition ◽  
Temperature Dependence ◽  
Strain Field ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Second Order ◽  
Experimental Results ◽  
High Signal ◽  
Qualitative And Quantitative

Abstract The predictions obtained with a thermodynamical method are compared with experimental results. Several materials which pass a ferroelectric phase transition of first or second order are investigated. The predictions correspond well with the experimentaly determined qualitative and quantitative features as to the field and temperature dependence. Finally, extraordinary strain-field curves are predicted and proved.

Ferroelectric phase transition in Pb0.60Sr0.40TiO3 thin films

2004 ◽  
Vol 87 (2-3) ◽  
pp. 353-356 ◽  
Author(s):  
S.H. Leal ◽  
F.M. Pontes ◽  
E.R. Leite ◽  
E. Longo ◽  
P.S. Pizani ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase

A Strain-Driven Antiferroelectric-to-Ferroelectric Phase Transition in La-Doped BiFeO3 Thin Films on Si

Nano Letters ◽  
2017 ◽  
Vol 17 (9) ◽  
pp. 5823-5829 ◽  
Author(s):  
Deyang Chen ◽  
Christopher T. Nelson ◽  
Xiaohong Zhu ◽  
Claudy R. Serrao ◽  
James D. Clarkson ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Bifeo3 Thin Films ◽  
La Doped

Surface and size effects on the Ferroelectric Phase Transition and Surface Polarization of Thin Films: Monte Carlo Simulations

1997 ◽  
Vol 493 ◽  
Author(s):  
J. Romero ◽  
L. F. Fonseca
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
First Order ◽  
Surface Polarization ◽  
Ferroelectric Phase Transition Temperature ◽  
Model Hamiltonian

ABSTRACTThe macroscopic polarization of ferroelectric thin films was studied by Monte Carlo simulations using a Transverse Ising Model Hamiltonian with four-spins interactions. The dependence of the ferroelectric phase transition temperature, Tc, on the thickness of the film was obtained resulting in a shifting of Tc towards lower temperatures and a change from first-order to second-order phase transition as the thickness of the film is reduced. Comparison between the surface and internal order was carried out by the calculation of layer-averaged polarizations as a function of the sample temperature and the surface interaction parameters. These comparisons show that increasing disorder at the surface can be reverted by increasing the four-spins surface interactions.

Directionally dependent ferroelectric phase transition order of anisotropic epitaxial BaxSr1−xTiO3 thin films

2006 ◽  
Vol 88 (1) ◽  
pp. 012902 ◽  
Author(s):  
Jeffrey A. Bellotti ◽  
Wontae Chang ◽  
Syed B. Qadri ◽  
Steven W. Kirchoefer ◽  
Jeffrey M. Pond
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase
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