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Size dependence of initial polarization direction in nanosized epitaxial islands fabricated by hydrothermal epitaxy below Curie temperature
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10.1063/1.1920431
/content/aip/journal/apl/86/17/10.1063/1.1920431
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/17/10.1063/1.1920431
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Figures

Image of FIG. 1.
FIG. 1.

(a) Plane-view SEM image of nanosized island on Nb doped- fabricated by hydrothermal epitaxy at 160 °C, for 30 min; and (b) x-ray diffraction pattern of thin film. The inset represents (101) pole figure of thin film. Note that x-ray diffraction analysis was carried out on a sample with denser islands, which was grown for a prolonged fabrication time of 16 h.

Image of FIG. 2.
FIG. 2.

(Color) (a) Piezoresponse image of a island with positive polarization. The inset shows a piezoresponse image after polarization switching by −10 V poling on the white arrowed region; (b) piezoresponse image of islands with positive polarization (A), and negative polarization (B and C). The inset shows a piezoresponse image after polarization switching by +10 V poling on a part of C island.

Image of FIG. 3.
FIG. 3.

Size dependence of initial polarization direction of island determined by PFM analysis. There is a critical size that determines the direction of the polarization at the as-fabricated state. The size of island was determined by AFM.

Image of FIG. 4.
FIG. 4.

Schematics diagrams of representing (a) the epitaxial growth of a tetragonal island with positive polarization in a hydrothermal solution; (b) the energy barriers in potential well according to ferroelectrics size; and (c) the spontaneous polarization reversal for compensating the depolarization field below a critical size in Fig. 3. Note that, above a critical size, the island maintains its initial positive polarization because of the high energy barrier for domain switching.

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/content/aip/journal/apl/86/17/10.1063/1.1920431
2005-04-18
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Size dependence of initial polarization direction in nanosized epitaxial PbTiO3 islands fabricated by hydrothermal epitaxy below Curie temperature
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/17/10.1063/1.1920431
10.1063/1.1920431
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