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Mater.
Res. Soc. 2003 Spring Meeting, San Francisco, USA(2003). [PDF] |
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A Comparative Study on the Differences in the
Evolutions of Thin Film Morphologies of Co-Al Binary System: Molecular
Dynamics Study
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Sang-Pil Kim, Seung-Cheol Lee, Kwang-Ryeol Lee,
Yong-Chae Chung, and Kyu-Hwan Lee
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The morphology evolution of thin
films was studied by molecular dynamics simulation. In this simulation four
deposition and substrate elements combinations were used: Al on Al(001), Al on
Co(001), Co on Co(001), Co on Al(001). The Al thin film was always grown by
layer-by-layer mode regardless of substrates used. On the other hand, thin
films formed by Co deposition depended on substrates used. While Co thin films
on the Co substrates were grown by the island mode, a 3 monolayer (ML)
thickness of CoAl surface compound was initially formed on Al substrate, before
pure Co thin film growth occurred. In addition to the study on morphologies,
the degrees of mixing of atoms in the interface were studied quantitatively. No
surface mixing and a sharp interface were observed when Co was used as a
substrate regardless of deposited atoms. On the contrary, a large amount of
surface mixing or compound formation was observed when Al was used as a
substrate. |
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