MEASUREMENTS OF DYNAMIC SCALING FROM EPITAXIAL-GROWTH FRONT - FE FILM ON FE(001)

Dynamic scaling behavior has been observed during the growth of Fe films on Fe(001) using high-resolution low-energy electron diffraction technique. The interface width grows with time according to the power law w is similar to t(beta), with beta = 0.22 +/- 0.02. Time-invariant self-affine behavior on the short-range scale has also been observed with the roughness exponent alpha = 0.79 +/- 0.05. The time-invariant characteristic agrees with the recent prediction based on the dynamic scaling theory. From the measured growth exponents, we suggest that the growth of Fe film is more consistent with a conservative growth process.