Amorphous Fe-Zr Alms of the same average Fe and Zr concentration of 50 at. %made by cosputtering as well as by solid-state reaction of multilayershave been compared by x-ray anomalous scattering experiments, magnetization measurements at low temperature, and transmission electron microscopy. After preparation the samples are notably different. However, annealing at temperatures between 350 and 450'C results in the same phase separation of the amorphous state.