Epitaxial Fe/Cu- and Cu/Fe/Cu-thin film layers prepared on (100)NaCl substrates by vapor deposition in UHV have been investigated by LEED, transmission electron microscopy (TEM) and conversion electron Mössbauer spectroscopy (CEMS). Paramagnetic (fcc) γ-Fe (100) films have been observed. The CEMS results indicate a decrease of s-electron density at the 57Fe nucleus with decreasing Fe film thickness possibly caused by lattice expansion near the Fe/Cu interface