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Evolution of ferroelectric domain structures embedded inside polycrystalline during heating
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Image of FIG. 1.
FIG. 1.

SEM micrograph of the sample investigated in this study.

Image of FIG. 2.
FIG. 2.

Capacitance change in as a function of temperature. The estimated uncertainties to determine the capacitance and temperature are ±0.1 nF and , respectively.

Image of FIG. 3.
FIG. 3.

Laue diffraction patterns of recorded at (a) room temperature and (b) above Curie temperature . (c) The evolution of (215) spots of ferroelectric domains in .

Image of FIG. 4.
FIG. 4.

(a) The schematic distributions of the domain variants in misorientation axes. The misorientation axes were based on the cubic grain and the angles were exaggerated for clarity. (b) The three dimensional arrangement of the domains.

Image of FIG. 5.
FIG. 5.

(a) 001 pole figure of the ferroelectric domain orientations at room temperature. (b) 100 pole figure of the grain at a temperature above the Curie temperature. For each plot, the specified crystal directions were drawn in global directions where the origin of the plot shows the surface normal. Wulff net is overlaid for clarity. The orientations correspond to those presented in Table I. The orientations at both temperatures have almost identical orientations and show a direct correlation between cubic and tetragonal phase.

Image of FIG. 6.
FIG. 6.

(a) (Color online) The evolution of ratio as a function temperature. (b) The angles between domain pairs (A/C and B/D) as a function of the temperature. Black curves were calculated by using tangent formula [Eq. (1)]. The estimated uncertainties to determine the orientation angle and temperature are ±0.05° and , respectively.


Generic image for table
Table I.

The orientations and misorientations of the domains seen at room temperature and above Curie temperature. The misorientations between the domains were calculated by selecting either domain A or domain E as the reference domain.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Evolution of ferroelectric domain structures embedded inside polycrystalline BaTiO3 during heating