Work Function and Adsorption Properties of Yttrium Group Rare Earth Metals,
Abstract
Experimental methods are described for determination of the work functions of REM as the metals and in thin films and for determination of the heat of adsorption. The work functions in thin films decrease over time and then rise to a constant value. The heats of adsorption of Gd, Ho and Er decrease with increase in atomic number but that of lutetium is highest of all, and appears to be independent of the substrate. The differences in work functions of thulium and lutetium appear to be connected with the fact that the f shell of the latter is completely filled and the f shell of the former is generally empty. The change in heat of adsorption apparently involves weakening of the metallic bonds of the adsorbed atoms and formation of ionic bonds between the adatoms and the substrate atoms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1974
- Accession Number
- ADA005979
Entities
People
- O. K. Kultashev
- S. E. Rozhkov
Organizations
- United States Army Foreign Science and Technology Center