In this study, for the first time, cobalt base ribbons were made by adding two different amounts of tungsten with Co67.7Fe4W0.8Si16.5B11 and Co66.5Fe4W2 Si16.5B11 compounds by melt spinning in the water. The pattern of X-ray diffraction taken from these ribbons shows that these magnetic ribbons are amorphous. By using thermal analysis curves, taken from the ribbons, crystallization temperature...
