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Direct determination of the effect of strain on domain morphology in ferroelectric superlattices with scanning probe microscopy
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10.1063/1.4746081
/content/aip/journal/jap/112/5/10.1063/1.4746081
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/5/10.1063/1.4746081

Figures

Image of FIG. 1.
FIG. 1.

Cross-sectional scanning transmission electron microscope image showing the structure of the [(BaTiO3) n /(SrTiO3) m ] p superlattices studied. The particular superlattice shown is the [(BaTiO3)8/(SrTiO3)4]40 superlattice grown on (101) SmScO3. The other two superlattices studied were [(BaTiO3)8/(SrTiO3)4]40 on (101) GdScO3 and [(BaTiO3)3/(SrTiO3)4]25 on (001) SrTiO3.

Image of FIG. 2.
FIG. 2.

Amplitude images of the [(BaTiO3) n /(SrTiO3) m ] p superlattices grown on three substrates. (a) and (d) = SrTiO3, (b) and (e) = GdScO3, (c) and (f) = SmScO3. (a)—(c) are 1 μm scan sizes. (d)–(f) are expanded regions designated by the box. The boxes in (d)–(f) are the size of the calculated images. Images were acquired with tip-free resonance = 79.14 kHz, k = 2.23 N/m, contact load ∼60 nN, and oscillation amplitude = 6.6 V.

Image of FIG. 3.
FIG. 3.

Calculated ferroelectric domain images of the [(BaTiO3) n /(SrTiO3) m ] p superlattices grown on three substrates. (a) and (d) on SrTiO3, (b) and (e) on GdScO3, (c) and (f) on SmScO3. (a)–(c) show domains with a BaTiO3 terminating layer, while (d)–(f) show domains with a SrTiO3 terminating surface. All calculations are of 64 × 64 nm cells. The colors correspond to the domains with polarizations indicated the arrows.

Image of FIG. 4.
FIG. 4.

Amplitude images of areas the same size as the calculations for the [(BaTiO3) n /(SrTiO3) m ] p superlattices grown on (a) SrTiO3, (b) GdScO3, and (c)SmScO3.

Tables

Generic image for table
Table I.

Comparison of substrate and film lattice dimension differences.

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/content/aip/journal/jap/112/5/10.1063/1.4746081
2012-09-04
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct determination of the effect of strain on domain morphology in ferroelectric superlattices with scanning probe microscopy
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/5/10.1063/1.4746081
10.1063/1.4746081
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