THE ROLE OF OPTIMIZATION IN THE LANDAU THEORY OF FERROELECTRIC THIN FILMS

2009 ◽  
Author(s):  
J. F. Webb ◽  
Abdul Halim Hakim ◽  
Pandian Vasant ◽  
Nader Barsoum
Keyword(s):  
Thin Films ◽  
Landau Theory ◽  
Ferroelectric Thin Films

The enhanced piezoelectricity in compositionally graded ferroelectric thin films under electric field: A role of flexoelectric effect

2018 ◽  
Vol 123 (8) ◽  
pp. 084103 ◽  
Author(s):  
Ye Qiu ◽  
Huaping Wu ◽  
Jie Wang ◽  
Jia Lou ◽  
Zheng Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Electric Field ◽  
Ferroelectric Thin Films ◽  
Flexoelectric Effect

The role of nanoporosity on the local piezo and ferroelectric properties of lead titanate thin films

2015 ◽  
Vol 3 (5) ◽  
pp. 1035-1043 ◽  
Author(s):  
Alichandra Castro ◽  
Paula Ferreira ◽  
Brian J. Rodriguez ◽  
Paula M. Vilarinho
Keyword(s):  
Thin Films ◽  
Coercive Field ◽  
Lead Titanate ◽  
Ferroelectric Properties ◽  
Ferroelectric Thin Films ◽  
Piezoelectric Response ◽  
Nanoporous Films ◽  
Switching Behaviour ◽  
Dense Films

Nanoporous PbTiO3 films present enhanced tetragonality at lower temperatures than respective dense films. Moreover, the porosity present in the nanoporous films allows an increase of the local piezoelectric response and a decrease of the local coercive field. As a result, these nanoporous films might be used to improve the switching behaviour of ferroelectric thin films.

scholarly journals Understanding the Role of Ferroelastic Domains on the Pyroelectric and Electrocaloric Effects in Ferroelectric Thin Films

2018 ◽  
Vol 31 (5) ◽  
pp. 1803312 ◽  
Author(s):  
Shishir Pandya ◽  
Gabriel A. Velarde ◽  
Ran Gao ◽  
Arnoud S. Everhardt ◽  
Joshua D. Wilbur ◽  
...  
Keyword(s):  
Thin Films ◽  
Ferroelectric Thin Films ◽  
Ferroelastic Domains

DYNAMIC PROPERTIES OF DIELECTRIC SUSCEPTIBILITY IN FERROELECTRIC THIN FILMS

2016 ◽  
Vol 23 (03) ◽  
pp. 1650010 ◽  
Author(s):  
LIAN CUI ◽  
HAIYING CUI ◽  
CHUNMEI WU ◽  
GUIHUA YANG ◽  
ZELONG HE ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Applied Field ◽  
Landau Theory ◽  
Dynamic Properties ◽  
Ferroelectric Thin Film ◽  
Ferroelectric Thin Films ◽  
Dielectric Susceptibility ◽  
Surface Transition ◽  
Frequency Temperature

In this paper, frequency, temperature, film thickness, surface effects, and various parameters dependence of dielectric susceptibility is investigated theoretically for ferroelectric thin films by the modified Landau theory under an AC applied field. The dielectric susceptibility versus AC applied field shows butterfly-shaped behavior, and depends strongly on the frequency and amplitude of the field and temperature. Our study shows that the existence of the surface transition layer can depress the dielectric susceptibility of a ferroelectric thin film. These results are well consistent with the phenomena reported in experiments.

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