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Surfactant Mediated Epitaxial Growth of Co on Au(111) Surface

Published online by Cambridge University Press:  11 February 2011

Masao Kamiko
Affiliation:
Institute of Industrial Science, University of Tokyo, 4–6–1 Komaba, Meguro-ku, Tokyo 153–8505, JAPAN.
Sang-Mun Oh
Affiliation:
Institute of Industrial Science, University of Tokyo, 4–6–1 Komaba, Meguro-ku, Tokyo 153–8505, JAPAN.
Hiroaki Chihaya
Affiliation:
Institute of Industrial Science, University of Tokyo, 4–6–1 Komaba, Meguro-ku, Tokyo 153–8505, JAPAN.
Hiroyuki Mizuno
Affiliation:
Institute of Industrial Science, University of Tokyo, 4–6–1 Komaba, Meguro-ku, Tokyo 153–8505, JAPAN.
Junhua Xu
Affiliation:
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, Higashi 1–1, Tsukuba, Ibaraki 305–8565, JAPAN
Lihua Yu
Affiliation:
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, Higashi 1–1, Tsukuba, Ibaraki 305–8565, JAPAN
Isao Kojima
Affiliation:
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, Higashi 1–1, Tsukuba, Ibaraki 305–8565, JAPAN
Ryoichi Yamamoto
Affiliation:
Institute of Industrial Science, University of Tokyo, 4–6–1 Komaba, Meguro-ku, Tokyo 153–8505, JAPAN.
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Abstract

We have chosen Bi as the surfactant atom in the heteroepitaxial growth of Co on Au(111). It was found that Bi induces layer-by-layer (LBL) growth at room temperature. With pre-deposition of 0.2 ∼ 0.8Å Bi on Au(111) prior to the evaporation of Co, more long-lasting RHEED intensity oscillations were observed and this implies that it induces the LBL growth of Co film. The result of the dependence of the growth behavior as a function of Bi layer thickness suggests that there is a suitable amount of Bi surfactant layer that induces the smoother LBL growth. A surface segregation of Bi was found at the top of surface and acts as a surfactant by promoting the interlayer transport.

Type
Research Article
Copyright
Copyright © Materials Research Society 2003

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References

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