Mössbauer spectroscopy study of the disordering process of Fe70Si30 alloy

In this work we study systematically the influence of mechanical attrition on the magnetic and structural properties of annealed Fe70Si30 alloy by means of Mössbauer spectroscopy, X-ray diffraction measurements and magnetic measurements. In order to obtain different stages of disorder the annealed (ordered) alloys were deformed by ball milling during different number of hours. The annealed alloy presents two different structures (D03 and D88) and the deformation of the annealed sample with ball milling induces the appearance of B20 structure. The variation of the amount of D88 and B20 structures makes the Si content of the D03 structure vary, which affects the magnetic properties. The disordering process has three different stages, characterized with different magnetic behaviors.