  Nickel islands are grown on W(110) at elevated temperatures. Islands with a
thickness of two layers are investigated with scanning tunneling microscopy.
Spectroscopic measurements reveal that nanometer sized areas of the islands
exhibit distinctly different apparent heights and dI/dV spectra. Spin polarized
and paramagnetic band structure calculations indicate that the spectral
features are due to fcc(111) and bcc(110) orientations of the Ni film,
respectively.
