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1/60 Sec. Time-Resolved High-Resolution Electron Microscopy of Surface-Diffusion of Tungsten Atoms on MgO (001) Surfaces

Published online by Cambridge University Press:  15 February 2011

N. Tanaka ,
H. Kimata  and
T. Kizuka
N. Tanaka
Affiliation:
Department of Applied Physics, School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464–01, Japan
H. Kimata
Affiliation:
Department of Applied Physics, School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464–01, Japan
T. Kizuka
Affiliation:
Department of Applied Physics, School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464–01, Japan
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Abstract

Surface diffusion process of tungsten(W)-atoms on MgO (001) surfaces was studied by high-resolution electron microscopy (HREM) in the time resolution of 1/60 s. The W-atoms were prepared on single crystalline MgO (001) films at 300°C by vacuumdeposition of WO3 or W-metal. Analysis of the recorded images revealed individual jump-process of the W-atoms in the substrate temperature from R.T. to 400°C, and gave the barrier potential (Ed) and the pre-exponential factor (D0). The diffusion processes on terraces and along steps were also compared in viewpoint of the jump length.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 404: Symposium J – In Situ Electron and Tunneling Microscopy of Dynamic Processes , 1995 , 37
Copyright
Copyright © Materials Research Society 1996

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