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Thermodynamic properties of compositionally graded thin films
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic illustration of the studied compositionally graded BST thin films with layers. denotes the compositional concentration in th layer and the direction is perpendicular to the film surface.

Image of FIG. 2.
FIG. 2.

Normalized polarization with respect to average polarization as a function of position at a given temperature . (a) and (b) correspond to the up-graded structure and the down-graded structure, respectively.

Image of FIG. 3.
FIG. 3.

Normalized polarization profile along the direction at the different temperatures , for a down-graded thin film with a fixed .

Image of FIG. 4.
FIG. 4.

Temperature dependence of the mean polarization for different compositional gradients. (a) and (b) depict the up-graded film with and the down-graded film with , respectively.

Image of FIG. 5.
FIG. 5.

Calculated charge offset as a function of the concentration in a down-graded structure for the different temperatures .

Image of FIG. 6.
FIG. 6.

Variations of the pyroelectric coefficient as a function of temperature for the different concentrations in the case of up-graded film.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thermodynamic properties of compositionally gradedBa1−xSrxTiO3 thin films