Reproducible Magnetostrain Behavior Induced By Structure Transformation For Ni46co4mn39sn11 Heusler Alloy

This paper presents the strain behavior associated with martensitic transformation for polycrystalline Ni46Co4Mn39Sn11. The unique reproducible magnetostrain in this alloy has been realized within a magnetic field change of 3 T, and its maximum value achieves about 0.012% at 225 K, which is almost ten times higher than that in Ni-Mn-Sn ternary alloy. Such a reproducible phenomenon could be attributed to the occurrence of the reversible transformation between multivariant martensite and austenite under an applied isothermal magnetic field. (C) 2015 AIP Publishing LLC.