Effect of Compositional Modulation on the Structure and Magnetic Properties for Mn-Al Thin Films

Recently, the consumption of Nd-Fe-B sintered magnets [1] has increased due to the utilization for hybrid and electric vehicles. However, due to the source natural resource of key elements such as Dy and Tb, a lot of efforts have been done to find another permanent magnet materials instead of rare earth based alloys. One of the candidate materials is Mn-based alloys. Among them, Mn-Al alloy with ferromagnetic τ -phase has been received much attention [2] because of its high magnetic anisotropy [3] and low material cost. In this study, the Mn-Al thin films have been fabricated on various composition and their structure and magnetic properties have been investigated.