Enhancement of the Curie temperature of epitaxial Fe films on W(110) caused by adsorption of submonolayers of Fe, Pd, Ag, and O

We have determined the Curie temperature ${\mathit{T}}_{\mathit{c}}$ of an epitaxial monolayer of Fe(110) on a W(110) substrate by means of spin-polarized low-energy-electron diffraction. Adsorption of submonolayer amount of Fe causes ${\mathit{T}}_{\mathit{c}}$ to increase distinctly. An enhancement of ${\mathit{T}}_{\mathit{c}}$ by about the same amount is also found upon adsorption of submonolayers of Pd, Ag, and ${\mathrm{O}}_2$.