Abstract
Vapor deposited Sm on a Ru(001) surface at 500 K has been investigated by X-ray photoelectron spectroscopy (XPS), temperature programmed desorption spectroscopy (TPD) and work function measurements. The development of a first monolayer can be described as simple adsorption of Sm on the Ru(001) surface. At higher coverages, intermixing of Sm and Ru occurs leading to the formation of a SmRu alloy. The formation of an interfacial alloy above 1 ML coverage is confirmed by Ru 3d core-level photoemission. The average valency of Sm in the alloy phase is determined. Temperature dependent experiments indicate the formation of two alloy phases at the 400-700 and 700-800 K regions. TPD data indicate the zero-order desorption of Sm. Work function changes show that there is a significant amount of charge transfer from Sm atoms to the Ru substrate at low coverages.
| Original language | English |
|---|---|
| Pages (from-to) | 293-300 |
| Number of pages | 8 |
| Journal | Surface Science |
| Volume | 327 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1995 Apr 10 |
| Externally published | Yes |
Keywords
- Auger electron spectroscopy
- Compound formation
- Growth
- Interface states
- Low index single crystal surfaces
- Metallic films
- Ruthenium
- Single crystal epitaxy
- Thermal desorption
- Thermal desorption spectroscopy
- Visible and ultraviolet photoelectron spectroscopy
- Work function measurements
- X-ray photoelectron spectroscopy
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry