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Studies of Interface and Surface Structures of BaTiO3 Thin Films Grown on SrTiO3 (001) Substrates by Mbe

Published online by Cambridge University Press:  15 February 2011

Hisashi Shigetani
Affiliation:
Taiyo Yuden Co LTD, Kamisatomi 1660, Harunamachi, Gunma-gun, Gunma, 370-33 JAPAN, shigetan@jty.yudenco.jp
Kazuyoshi Kobayashi
Affiliation:
Taiyo Yuden Co LTD, Kamisatomi 1660, Harunamachi, Gunma-gun, Gunma, 370-33 JAPAN, shigetan@jty.yudenco.jp
Masayuki Fujimoto
Affiliation:
Taiyo Yuden Co LTD, Kamisatomi 1660, Harunamachi, Gunma-gun, Gunma, 370-33 JAPAN, shigetan@jty.yudenco.jp
Wataru Sugimura
Affiliation:
Waseda University, Ohkubo 3-4-1, Shinjuku, Tokyo, 169 JAPAN
Yoshio Matsui
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki, 305 JAPAN
Junzo Tanaka
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki, 305 JAPAN
Corresponding
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Abstract

We studied a lattice distortion and relaxation of BaTiO3(BT) thin films grown on SrTiO3 (001) substrates(ST) by a molecular beam epitaxy method using an oxygen radical source RT were prepared by alternately deposition of BaO and TiO2 layers, and the structure of the thin films was evaluated by X-ray diffraction, reflection high energy electron diffraction, transmission electron microscopy, atomic force microscopy, coaxial impact collision ion scattering spectroscopy and X-ray photoelectron spectroscopy The lattice constants of the films varied with distance from the interface of BT and ST It was found that lattice distortion and relaxation of BT On the other hand, the surface analysis indicated that adsorbed oxygen was enriched on the BaO-terminated surface in comparison with the TiO2-terminated surface Then we proposed new mechanism of BT thin film growth with adsorbed oxygen.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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References

1. Tabata, H., Tanaka, H., Kawai, T., and Okuyama, M.,.Jpn. J. Appl. IPhys., 34 (1995) 544.CrossRefGoogle Scholar
2. Kang, S., Tanaka, I., Adachi, H., and Park, S. J., Bulletin of the Society for Variational X α 8(2) (1995) 201.Google Scholar

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