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Unusual 90° domain structure in (2/3)Bi(Zn1/2Ti1/2)O3-(1/3)BiFeO3 epitaxial films with giant 22% tetragonal distortion
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Image of FIG. 1.
FIG. 1.

(a) HR-XRD 2 pattern, (b) XRD 2 mapping, (c) XRD 2 pattern integrated along direction, and (d) XRD pole figure plot measured at 30.31° and XRD mappings of (e) 002 and (f) 200 diffractions in (2/3)Bi(ZnTi)O-(1/3)BiFeO film grown on (100)cSrRuO//(100)SrTiO substrate. Red-circles, blue-circles, triangles, and squares in (b) correspond to peaks originated from c-domain, a-domain, SrRuO, and SrTiO, respectively.

Image of FIG. 2.
FIG. 2.

XRD reciprocal space mappings around (a) 003 and (b) 103 in (2/3)Bi(ZnTi)O-(1/3)BiFeO film grown on (100)cSrRuO//(100)SrTiO substrate.

Image of FIG. 3.
FIG. 3.

Cross sectional HAADIF-STEM images of macroscopic -/-domain boundary in (2/3)Bi(ZnTi)O-(1/3)BiFeO film grown on (100)cSrRuO//(100)SrTiO substrate. Inset schematic illustration is a domain boundary model of -/-domain.

Image of FIG. 4.
FIG. 4.

(a) Z-contrast images focused on -domain in the films, intensity profiles of perovskite cations along (b), (c) [001] and (d), (e) [100] directions. (b),(d) Green and (c), (e) blue lines, respectively, correspond to perovskite -and -site cations. (f) Z-contrast image and (g) schematic illustration of averaged -domain unit cell.

Image of FIG. 5.
FIG. 5.

(a) In-plane -axis and out-of-plane -axis lattice parameters and (b) [(/)-1] as a function of temperature in (2/3)Bi(ZnTi)O-(1/3)BiFeO film grown on (100)SrRuO//(100)SrTiO substrate. Powder data in Bi(Zn Ti)O (Ref. ) and PbTiO (Ref. ) were also added as red squares and blue triangles, respectively.

Image of FIG. 6.
FIG. 6.

(a) Piezoresponse phase mapping image after writing +30 V and −30 V and (b) longitudinal piezoelectric loops as a function of DC voltage together with the for (2/3)Bi(ZnTi)O-(1/3)BiFeO film grown on (100)SrRuO//(100)SrTiO substrate.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Unusual 90° domain structure in (2/3)Bi(Zn1/2Ti1/2)O3-(1/3)BiFeO3 epitaxial films with giant 22% tetragonal distortion