Giant low-field magnetocaloric effect in a textured Ni45.3Co5.1Mn36.1In13.5 alloy

Abstract

We demonstrate a remarkable magnetocaloric effect in a directionally solidified Ni45.3Co5.1Mn36.1In13.5 alloy with coarse-grained microstructure and strong 〈001〉A texture. Due to this optimized microstructure and the strong magnetostructural coupling, a giant ΔTad up to −5.1K is achieved under low field change of 1.5T, which is even superior to that of polycrystalline bulk alloys under the field change of 2T. Furthermore, it is presented that the reversible ΔTad can be improved after certain predeformation, which should be attributed to the introduction of certain internal stress by predeformation.