Magnetocaloric materials have shown huge potential for magnetic refrigeration but fail meeting the application standard because of the low magnetic entropy change ΔS_M. In this work, high-energy electron irradiation is used to enlarge the magnetization difference ΔM in the inverse martensitic transition for Ni–Co–Mn–In alloys, which is mainly attributed to the variations of the short-range atomic arrangement and electronic structure. As a result, the ΔS_M can reach up to 62.17 J/(kgK) only with a small magnetic field of 3 T. Even compared with the ΔS_M of other works measured under 5 T magnetic field, this value is much superior and can be further improved up to 136.16 J/(kgK) with increasing the magnetic field to 7 T. Such high ΔS_M could improve the attractiveness of the material for the actual application.

磁热材料显示出巨大的磁制冷潜力，但由于磁熵变ΔS _M低，未能达到应用标准。在这项工作中，高能电子辐照被用于扩大Ni-Co-Mn-In合金逆马氏体转变中的磁化差ΔM，这主要归因于短程原子排列和电子结构的变化。结果，仅在3 T的小磁场下，ΔS _M才能达到62.17 J /（kgK）。甚至与ΔS _M相比在5 T磁场下测量的其他功中，该值要优越得多，并且可以通过将磁场增加到7 T进一步提高到136.16 J /（kgK）。如此高的ΔS _M可以提高材料的吸引力实际应用。