Properties of Co alloyed Ni Fe Ga Ferromagnetic Shape Memory Alloys

It is experimentally found that in the Ni54Fe20 xCoxGa26 ferromagnetic shape memory alloys, Co variation from 0 to 9 at. leads to i almost linear change of martensitic transformation temperatures from 270 C to 120 C; ii a non monotonous change of the Curie temperature, and iii a linear decrease of saturation magnetization from 60 to 43 Am2 kg. The selected alloys grown as single crystals have been magneto mechanically tested. The superelastic effect has been measured to be about 4 . The magneto strain shows a training effect which is an evidence of the effect of magnetic field induced twin boundary motio