Chernenko, V.A. ; Oikawa, K. ;Chmielus, M. ; Besseghini, S. ; Villa, E. ; Albertini, F. ; Righi, L. ; Paoluzi, A. ; Müllner, P. ; Kainuma, R. ; Ishida, K.: Properties of Co-alloyed Ni-Fe-Ga Ferromagnetic Shape Memory Alloys. Journal of Materials Engineering and Performance 18 (2009), p. 548-553
10.1007/s11665-009-9425-7
Abstract:
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 motion.