Metastable FeCu alloys have been produced by simultaneous vapor deposition of Fe and Cu onto substrates at 295 and 77 K. The following phases have been identified by Mössbauer spectroscopy and electron microscopy : 0-40 at % Cu, bcc alloy ; 40-65 at % Cu, mixture of bcc and fcc alloys ; 65-100 at % Cu, fcc alloy. For the bcc alloys the decrease in the hyperfine field (h.f.) at 77 and 295 K per nearest and next-nearest neighbor, respectively, has been determined. A very low Curie temperature Tc ~ 600 K could be estimated for such a small Cu concentration c as 3 %. For larger c the reduced average h.f. does not follow the relation 1-0.42 c given by Stearns. This deviation can be explained by clustering of Cu atoms, and the average short-range order parameter [MATH] is estimated to be + 0.7. Fcc alloys show magnetic order at 4.2 K, probably due to Fe clusters in the Cu matrix