Unusual 90°domain structure in (2/3)Bi(Zn1/2Ti 1/2)O3-(1/3)BiFeO3 epitaxial films with giant 22% tetragonal distortion

Shintaro Yasui, Keisuke Yazawa, Masaaki Matsushima, Tomoaki Yamada, Hitoshi Morioka, Hiroshi Uchida, Takashi Iijima, Lu You, Junling Wang, Takahisa Yamamoto, Yuichi Ikuhara, Hiroshi Funakubo

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5 Citations (Scopus)

Abstract

Epitaxial films of tetragonal (001)/(100)-oriented (2/3)Bi(Zn 1/2Ti1/2)O3-(1/3)BiFeO3 were grown on (100)cSrRuO3//(100)SrTiO3 substrates by metalorganic chemical vapor deposition. 93% of the film is occupied by c-domain [(001) orientation], and the out-of-plane (c-axis) and in-plane (a-axis) lattice parameters are 0.465 nm and 0.381 nm, respectively. The tetragonal distortion, (c/a)-1, is 22% which is 3.5 times larger than that of PbTiO3 (6.3%). High-angle annular dark-field-scanning transmission electron microscopy images show clear c-/a-domain structures with unusual boundary angles of 51°/39°due to the large c/a ratio of tetragonal phase. High temperature X-ray diffraction measurements reveal that the Curie temperature of this film is above 800°C.

Original languageEnglish
Article number042904
JournalApplied Physics Letters
Volume103
Issue number4
DOIs
Publication statusPublished - 2013 Jul 22
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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