Controlling the phase transition in nanocrystalline ferroelectric thin films via cation ratio

Nanoscale ◽  
2018 ◽  
Vol 10 (46) ◽  
pp. 21798-21808 ◽  
Author(s):  
Iryna S. Golovina ◽  
Matthias Falmbigl ◽  
Christopher J. Hawley ◽  
Anthony J. Ruffino ◽  
Aleksandr V. Plokhikh ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Ferroelectric Thin Films ◽  
Novel Approach ◽  
Cation Ratio

We demonstrate a novel approach for tuning the ferroelectric phase transition in nanograined thin films utilizing enhanced cation solubility.

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

Dielectric properties of epitaxial KNbO3 ferroelectric thin films

2002 ◽  
Vol 17 (2) ◽  
pp. 275-278 ◽  
Author(s):  
Soma Chattopadhyay ◽  
B. M. Nichols ◽  
Jin-Ha Hwang ◽  
T. O. Mason ◽  
B. W. Wessels
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Dielectric Response ◽  
Ferroelectric Phase Transition ◽  
Applied Field ◽  
Metalorganic Chemical Vapor Deposition ◽  
Ferroelectric Phase ◽  
Chemical Vapor ◽  
Ferroelectric Thin Films ◽  
Thickness Effect

The dielectric response of KNbO3 epitaxial ferroelectric thin films was measured as a function of bias, frequency, and temperature. Thin films with a thickness of 80 to 350 nm were deposited on spinel substrates by low-pressure metalorganic chemical vapor deposition. Bias dependence measurements showed hysteresis in the dielectric response. The dielectric constant decreased with bias, and the tunability was calculated to be between 35% and 42% for an applied field of 7 MV/cm. The frequency dependence of the dielectric constant followed a power law. A pronounced thickness effect was observed in the dielectric response, especially at the Curie temperature. With decreasing thickness, the dielectric constant and the loss tangent decreased. A diffuse ferroelectric phase transition was observed for films with a thickness less than 350 nm.

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

Effect of thermal strain on the ferroelectric phase transition in polycrystalline Ba0.5Sr0.5TiO3 thin films studied by Raman spectroscopy

2004 ◽  
Vol 85 (18) ◽  
pp. 4124-4126 ◽  
Author(s):  
D. A. Tenne ◽  
A. Soukiassian ◽  
X. X. Xi ◽  
T. R. Taylor ◽  
P. J. Hansen ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Raman Spectroscopy ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Thermal Strain
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