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Related Experiment Video

Updated: May 26, 2026

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

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Published on: May 29, 2018

Electrical domain morphologies in compositionally graded ferroelectric films.

M B Okatan¹, A L Roytburd, V Nagarajan

¹School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia. m.b.okatan@gmail.com

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|December 17, 2011

Summary

We developed a new thermodynamic model for graded ferroelectric films. This model shows that controlling compositional grading allows for designing specific domain structures and achieving desirable dielectric properties.

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Published on: March 27, 2018

Area of Science:

Materials Science
Condensed Matter Physics
Solid State Chemistry

Background:

Ferroelectric films are crucial for electronic devices.
Controlling their properties is key for advanced applications.
Compositional grading offers a pathway to tailor ferroelectric behavior.

Purpose of the Study:

To develop a nonlinear thermodynamic formalism for graded ferroelectric films.
To analyze the electrostatic interactions within these films.
To understand how compositional grading influences domain morphology and dielectric properties.

Main Methods:

Nonlinear thermodynamic formalism.
Electrostatic analysis.
Modeling of uniaxial n-layered and continuously graded heteroepitaxial ferroelectric films.

Main Results:

Domain morphology is dictated by spontaneous polarization induced by compositional grading.
Both layered and continuously graded films exhibit nonlinear dielectric behavior.
High dielectric tunability is achieved in (001) (Ba,Sr)TiO3 and (001) Pb(Zr,Ti)O3 films.

Conclusions:

Compositional grading is an effective method to design ferroelectric domain structures.
Tailoring the grading strength allows for precise control over dielectric properties.
This approach enables the development of advanced ferroelectric materials with tunable characteristics.