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

15 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
Externally published	Yes

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.",

author = "Shijian Zheng and Fisher, {Craig A.J.} and Takeharu Kato and Yuki Nagao and Hiromichi Ohta and Yuichi Ikuhara",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports and Technology (MEXT) and the Japan Society for the Promotion of Science (JSPS). This work was conducted in the Research Hub for Advanced Nano Characterization, The University of Tokyo, supported by MEXT. H.O. is supported by MEXT (22360271).",

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doi = "10.1063/1.4766338",

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T1 - Domain formation in anatase TiO 2 thin films on LaAlO 3 substrates

AU - Zheng, Shijian

AU - Fisher, Craig A.J.

AU - Kato, Takeharu

AU - Nagao, Yuki

AU - Ohta, Hiromichi

AU - Ikuhara, Yuichi

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports and Technology (MEXT) and the Japan Society for the Promotion of Science (JSPS). This work was conducted in the Research Hub for Advanced Nano Characterization, The University of Tokyo, supported by MEXT. H.O. is supported by MEXT (22360271).

PY - 2012/11/5

Y1 - 2012/11/5

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

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