The structural and magnetic properties of [Mn.sub.2-x][Fe.sub.x]NiGa Heusler alloys

A study is conducted to examine the effect of Fe substitution on the phase transformation and magnetic properties of [Mn.sub.2]NiGa. Theoretical calculations indicated that both austenitic and martensitic phases are ferrimagnets and the Fe moment which varies from positive to negative after the tetragonal distortion leads to the decrease of the saturation magnetization.