Large magnetoresistance in a directionally solidified Ni_(44.5)Co_(5.1)Mn_(37.1)In_(13.3) magnetic shape memory alloy

摘要

Polycrystalline Ni44.5Co5.1Mn37.1In13.3 alloy with coarse columnar-shaped grains and 001 (A) preferred orientation was prepared by directional solidification. Due to the strong magnetostructural coupling, inverse martensitic transformation can be induced by the magnetic field, resulting in large negative magnetoresistance up to -58% under the field of 3 T. Such significant field controlled functional behaviors should be attributed to the coarse grains and strong preferred orientation in the directionally solidified alloy. (C) 2017 Elsevier B.V. All rights reserved.