Interface structure and the chemical states of Pt film on polar-ZnO single crystal

T. Nagata; J. Volk; Y. Yamashita; H. Yoshikawa; M. Haemori; R. Hayakawa; M. Yoshitake; S. Ueda; K. Kobayashi; T. Chikyow

doi:10.1063/1.3149701

Interface structure and the chemical states of Pt film on polar-ZnO single crystal

T. Nagata, J. Volk, Y. Yamashita, H. Yoshikawa, M. Haemori, R. Hayakawa, M. Yoshitake, S. Ueda, K. Kobayashi, T. Chikyow

Research output: Contribution to journal › Article

16 Citations (Scopus)

Abstract

The interface structures and the chemical states between the Pt layer and polar-ZnO single crystal were investigated. Two-dimensional x-ray diffraction images revealed that Zn-polar ZnO had less mosaicity than the O-polar one. Angle-resolved hard x-ray photoelectron spectroscopy was used to investigate the chemical states of the interface. At the interface of the Pt/Zn-polar ZnO, zinc diffusion into the Pt layer, forming PtZn and ZnPtO bonds, was found. For the O-polar ZnO, in contrast, PtO was predominantly formed at the interface. Zinc diffusion prevented oxidization of the Pt layer and affected the mosaicity of the interface.

Original language	English
Article number	221904
Journal	Applied Physics Letters
Volume	94
Issue number	22
DOIs	https://doi.org/10.1063/1.3149701
Publication status	Published - 2009 Jun 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Nagata, T., Volk, J., Yamashita, Y., Yoshikawa, H., Haemori, M., Hayakawa, R., Yoshitake, M., Ueda, S., Kobayashi, K., & Chikyow, T. (2009). Interface structure and the chemical states of Pt film on polar-ZnO single crystal. Applied Physics Letters, 94(22), [221904]. https://doi.org/10.1063/1.3149701

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abstract = "The interface structures and the chemical states between the Pt layer and polar-ZnO single crystal were investigated. Two-dimensional x-ray diffraction images revealed that Zn-polar ZnO had less mosaicity than the O-polar one. Angle-resolved hard x-ray photoelectron spectroscopy was used to investigate the chemical states of the interface. At the interface of the Pt/Zn-polar ZnO, zinc diffusion into the Pt layer, forming PtZn and ZnPtO bonds, was found. For the O-polar ZnO, in contrast, PtO was predominantly formed at the interface. Zinc diffusion prevented oxidization of the Pt layer and affected the mosaicity of the interface.",

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AU - Nagata, T.

AU - Volk, J.

AU - Yamashita, Y.

AU - Yoshikawa, H.

AU - Haemori, M.

AU - Hayakawa, R.

AU - Yoshitake, M.

AU - Ueda, S.

AU - Kobayashi, K.

AU - Chikyow, T.

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AB - The interface structures and the chemical states between the Pt layer and polar-ZnO single crystal were investigated. Two-dimensional x-ray diffraction images revealed that Zn-polar ZnO had less mosaicity than the O-polar one. Angle-resolved hard x-ray photoelectron spectroscopy was used to investigate the chemical states of the interface. At the interface of the Pt/Zn-polar ZnO, zinc diffusion into the Pt layer, forming PtZn and ZnPtO bonds, was found. For the O-polar ZnO, in contrast, PtO was predominantly formed at the interface. Zinc diffusion prevented oxidization of the Pt layer and affected the mosaicity of the interface.

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