N. Tanaka et al., TIME-RESOLVED HIGH-RESOLUTION ELECTRON-MICROSCOPY OF SURFACE-DIFFUSION OF TUNGSTEN ATOMS ON MGO(001) SURFACES, Journal of Electron Microscopy, 45(1), 1996, pp. 113-118
A surface diffusion process of tungsten (W)-atoms on MgO (001) surface
s was studied by high-resolution electron microscopy (HREM) in the tim
e resolution of 1/60 s, The W-atoms were prepared on single crystallin
e MgO (001) films at 300 degrees C by vacuum-deposition of WO3 or W-me
tal. Analysis of recorded images revealed individual jump-process of t
he W-atoms in the substrate temperature from R.T. to 400 degrees C, an
d gave the barrier potential (E(d)) and the pre-exponential factor (D-
o), Details of the microscopy and the data-analysis method are describ
ed as advanced techniques of HREM.