Diffraction contrast analysis of 90° and 180° ferroelectric domain structures of PbTiO3 thin films

Kenta Aoyagi; Takanori Kiguchi; Yoshitaka Ehara; Tomoaki Yamada; Hiroshi Funakubo; Toyohiko J. Konno

doi:10.1088/1468-6996/12/3/034403

Diffraction contrast analysis of 90° and 180° ferroelectric domain structures of PbTiO₃ thin films

Kenta Aoyagi, Takanori Kiguchi, Yoshitaka Ehara, Tomoaki Yamada, Hiroshi Funakubo, Toyohiko J. Konno

Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The ferroelectric domain structure of a PbTiO₃ thin film on (100) SrTiO₃ has been investigated by transmission electron microscopy (TEM). Two types of a-domain were found: one extended through the film to the surface and another comprised small a-domains confined within the film. Dark-field TEM (DFTEM) observation revealed that 180° domains formed near the substrate and stopped their growth 100 nm away from the substrate. The DFTEM observation also revealed that 90° domain boundaries had head-to-tail structures. To confirm the polarization direction obtained by experiments, diffracted intensities under a two-beam condition were simulated using the extended Darwin-Howie-Whelan equations. On the basis of the obtained results, a ferroelectric domain structure model of PbTiO₃ thin films on SrTiO₃ is proposed.

Original language	English
Article number	034403
Journal	Science and Technology of Advanced Materials
Volume	12
Issue number	3
DOIs	https://doi.org/10.1088/1468-6996/12/3/034403
Publication status	Published - 2011 Jun

Keywords

Ferroelectric thin film
PbTiO3
TEM

ASJC Scopus subject areas

Materials Science(all)

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10.1088/1468-6996/12/3/034403

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title = "Diffraction contrast analysis of 90° and 180° ferroelectric domain structures of PbTiO3 thin films",

abstract = "The ferroelectric domain structure of a PbTiO3 thin film on (100) SrTiO3 has been investigated by transmission electron microscopy (TEM). Two types of a-domain were found: one extended through the film to the surface and another comprised small a-domains confined within the film. Dark-field TEM (DFTEM) observation revealed that 180° domains formed near the substrate and stopped their growth 100 nm away from the substrate. The DFTEM observation also revealed that 90° domain boundaries had head-to-tail structures. To confirm the polarization direction obtained by experiments, diffracted intensities under a two-beam condition were simulated using the extended Darwin-Howie-Whelan equations. On the basis of the obtained results, a ferroelectric domain structure model of PbTiO3 thin films on SrTiO3 is proposed.",

keywords = "Ferroelectric thin film, PbTiO3, TEM",

author = "Kenta Aoyagi and Takanori Kiguchi and Yoshitaka Ehara and Tomoaki Yamada and Hiroshi Funakubo and Konno, {Toyohiko J.}",

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T1 - Diffraction contrast analysis of 90° and 180° ferroelectric domain structures of PbTiO3 thin films

AU - Aoyagi, Kenta

AU - Kiguchi, Takanori

AU - Ehara, Yoshitaka

AU - Yamada, Tomoaki

AU - Funakubo, Hiroshi

AU - Konno, Toyohiko J.

PY - 2011/6

Y1 - 2011/6

N2 - The ferroelectric domain structure of a PbTiO3 thin film on (100) SrTiO3 has been investigated by transmission electron microscopy (TEM). Two types of a-domain were found: one extended through the film to the surface and another comprised small a-domains confined within the film. Dark-field TEM (DFTEM) observation revealed that 180° domains formed near the substrate and stopped their growth 100 nm away from the substrate. The DFTEM observation also revealed that 90° domain boundaries had head-to-tail structures. To confirm the polarization direction obtained by experiments, diffracted intensities under a two-beam condition were simulated using the extended Darwin-Howie-Whelan equations. On the basis of the obtained results, a ferroelectric domain structure model of PbTiO3 thin films on SrTiO3 is proposed.

AB - The ferroelectric domain structure of a PbTiO3 thin film on (100) SrTiO3 has been investigated by transmission electron microscopy (TEM). Two types of a-domain were found: one extended through the film to the surface and another comprised small a-domains confined within the film. Dark-field TEM (DFTEM) observation revealed that 180° domains formed near the substrate and stopped their growth 100 nm away from the substrate. The DFTEM observation also revealed that 90° domain boundaries had head-to-tail structures. To confirm the polarization direction obtained by experiments, diffracted intensities under a two-beam condition were simulated using the extended Darwin-Howie-Whelan equations. On the basis of the obtained results, a ferroelectric domain structure model of PbTiO3 thin films on SrTiO3 is proposed.

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