Domain formation in anatase TiO 2 thin films on LaAlO 3 substrates

Shijian Zheng; Craig A.J. Fisher; Takeharu Kato; Yuki Nagao; Hiromichi Ohta; Yuichi Ikuhara

doi:10.1063/1.4766338

Domain formation in anatase TiO ₂ thin films on LaAlO ₃ substrates

Shijian Zheng, Craig A.J. Fisher, Takeharu Kato, Yuki Nagao, Hiromichi Ohta, Yuichi Ikuhara

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

11 Citations (Scopus)

Abstract

Using advanced Cs-corrected scanning transmission electron microscopy, we have observed the atomic structures of coherent TiO ₂/LaAlO ₃ heterointerfaces in anatase TiO ₂ thin films deposited on single-crystal LaAlO ₃. Two epitaxial relationships are identified: (001)[100] TiO ₂//(001)[100] LaAlO ₃ and (001)[010] TiO ₂//(001)[100] LaAlO ₃. These epitaxial relationships and the terrace steps on the substrate surface result in the formation of multidomains in the anatase TiO ₂ thin films. Three types of domain boundaries are identified, namely, 90°rotation domain boundaries, translation domain boundaries, and mixtures of the two. These domain boundaries are expected to have a profound effect on the properties of the thin film.

Original language	English
Article number	191602
Journal	Applied Physics Letters
Volume	101
Issue number	19
DOIs	https://doi.org/10.1063/1.4766338
Publication status	Published - 2012 Nov 5

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Domain formation in anatase TiO 2 thin films on LaAlO 3 substrates",

abstract = "Using advanced Cs-corrected scanning transmission electron microscopy, we have observed the atomic structures of coherent TiO 2/LaAlO 3 heterointerfaces in anatase TiO 2 thin films deposited on single-crystal LaAlO 3. Two epitaxial relationships are identified: (001)[100] TiO 2//(001)[100] LaAlO 3 and (001)[010] TiO 2//(001)[100] LaAlO 3. These epitaxial relationships and the terrace steps on the substrate surface result in the formation of multidomains in the anatase TiO 2 thin films. Three types of domain boundaries are identified, namely, 90°rotation domain boundaries, translation domain boundaries, and mixtures of the two. These domain boundaries are expected to have a profound effect on the properties of the thin film.",

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AU - Zheng, Shijian

AU - Fisher, Craig A.J.

AU - Kato, Takeharu

AU - Nagao, Yuki

AU - Ohta, Hiromichi

AU - Ikuhara, Yuichi

PY - 2012/11/5

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N2 - Using advanced Cs-corrected scanning transmission electron microscopy, we have observed the atomic structures of coherent TiO 2/LaAlO 3 heterointerfaces in anatase TiO 2 thin films deposited on single-crystal LaAlO 3. Two epitaxial relationships are identified: (001)[100] TiO 2//(001)[100] LaAlO 3 and (001)[010] TiO 2//(001)[100] LaAlO 3. These epitaxial relationships and the terrace steps on the substrate surface result in the formation of multidomains in the anatase TiO 2 thin films. Three types of domain boundaries are identified, namely, 90°rotation domain boundaries, translation domain boundaries, and mixtures of the two. These domain boundaries are expected to have a profound effect on the properties of the thin film.

AB - Using advanced Cs-corrected scanning transmission electron microscopy, we have observed the atomic structures of coherent TiO 2/LaAlO 3 heterointerfaces in anatase TiO 2 thin films deposited on single-crystal LaAlO 3. Two epitaxial relationships are identified: (001)[100] TiO 2//(001)[100] LaAlO 3 and (001)[010] TiO 2//(001)[100] LaAlO 3. These epitaxial relationships and the terrace steps on the substrate surface result in the formation of multidomains in the anatase TiO 2 thin films. Three types of domain boundaries are identified, namely, 90°rotation domain boundaries, translation domain boundaries, and mixtures of the two. These domain boundaries are expected to have a profound effect on the properties of the thin film.

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