Amorphous thin films alloys of Fe-Ge ranging from 0 to 75 at. % iron have been prepared in which germanium serves as an amorphous diamagnetic matrix for iron atoms. Analysis of electron diffraction rings show the films to be amorphous for all compositions and can be interpreted on the basis of hard sphere models. Electrical conductivity from 20 K to 300 K has been performed, and for all films up to 25 at. % Fe, the Mott power law σ(T) = σ0 exp–(T0/T)¼ is obeyed. Magnetic measurements have been performed to establish the nature and range of magnetic interactions. Long range magnetic order (ferromagnetic) appears at around a critical concentration of about 25 at. % Fe. Curie temperature as a function of increasing Fe concentration shows extremely rapid increase of Tc around the critical concentration. The hysteresis loop measured by Kerr effect is square and implies uniform magnetization in the films. The critical percolation concentration of magnetic atoms implies a coordination number of ~ 8 for the amorphous matrix at this concentration. Measurements by Lorentz electron microscopy are also performed