| Numéro |
J. Phys. Colloques
Volume 50, Numéro C8, Novembre 1989
36th International Field Emission Symposium
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|---|---|---|
| Page(s) | C8-123 - C8-128 | |
| DOI | https://doi.org/10.1051/jphyscol:1989822 | |
36th International Field Emission Symposium
J. Phys. Colloques 50 (1989) C8-123-C8-128
DOI: 10.1051/jphyscol:1989822
1 Institute of Experimental Physics, Wroclaw University, 50-205 Wroclaw, Cybulskiego 36, USSR
2 Sektion Physik, Karl-Marx-Universität Leipzig, DDR-7010 Leipzig, Linnéstrasse 5, D.R.G.
J. Phys. Colloques 50 (1989) C8-123-C8-128
DOI: 10.1051/jphyscol:1989822
SURFACE DIFFUSION OF LITHIUM ON THE W(112) PLANE BY FIELD EMISSION SPECTRAL DENSITY ANALYSIS
T. BIERNAT1 et CH. KLEINT21 Institute of Experimental Physics, Wroclaw University, 50-205 Wroclaw, Cybulskiego 36, USSR
2 Sektion Physik, Karl-Marx-Universität Leipzig, DDR-7010 Leipzig, Linnéstrasse 5, D.R.G.
Abstract
The spectral density functions W(f) of the field-emission flicker noise of lithium adsorbed on the tungsten (112) plane were determined at different temperatures in a probe-hole field emission microscope. By an analysis in terms of the Timm and van der Ziel model the surface diffusion coefficients have been obtained and their temperature dependence reveals the surface diffusion energies. For the two coverages of c = 0.38 and 0.75 investigated their values could be determined to be Q = 0.56 and 1.08 eV, respectively. The diffusivity prefactors were also calculated. The results are compared with those obtained for the W(112)K system.