New magnetic material of cold worked Fe-Cu alloy

Iron and copper are practically immiscible at all solid-state temperatures, but fine ferromagnetic iron phases are spaced by a nonmagnetic copper matrix. Severe cold drawing is carried out to obtain the fine elongated iron particles in a copper matrix. Magnetic properties are investigated at different stages of cold drawing and of various alloy compositions. The effect of heat treatment after cold drawing is also investigated and the relationship between the shape of the iron particles and the magnetic properties is taken into consideration. Iron-copper alloys severely cold drawn have good magnetic properties not only as semihard magnetic materials but also as hard magnetic materials.