Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5359792 | Applied Surface Science | 2009 | 5 Pages |
Abstract
The mobility of W atoms of the (3Â 2Â 0) and (2Â 2Â 1) regions of the W microcrystal surface with the tip curvature radius â¼300Â nm and the surface diffusion of Dy at average coverage â¼0.1Â ML on these regions were investigated by spectral analysis of field emission current fluctuations in the temperature range 500-800Â K. The diffusion appears to be one-dimensional for the W(3Â 2Â 0) regions and two-dimensional for the W(2Â 2Â 1). The surface-diffusion coefficients were determined by comparison of the experimental results with the theoretical spectral density functions derived by Gesley and Swanson. The surface-diffusion parameters were calculated. The results are discussed from the aspect of substrate structure.
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Authors
T. Biernat, R. BÅaszczyszyn,