Enhanced Refrigeration Capacity Of Rare-Earth-Free Ni-Co-Mn-In-Si Heusler Alloys For Magnetic Refrigerants

NiMn-based Heusler alloy-based solid-state refrigeration technology has received great attention in the field of magnetic refrigeration due to their low energy consumption, environmental friendliness, high magnetization difference (Delta M), low thermal hysteresis (Delta T-hys) across the magneto-structural transformation, and giant magnetocaloric properties at the low magnetic field. We report the promising rare-earth-free magnetic refrigerant material of Ni45Co5Mn37In12Si1 prepared by arc melting followed by heat-treatment with an inverse magnetocaloric effect and notable inverse Delta S-M of 8.6 J kg(-1) K-1 around 241 K. Moreover, the large refrigeration capacity (RC) of 462 J kg(-1) with a wide operating temperature of similar to 53.8 K is obtained for sample thus annealed for 10 h, which is relatively comparable with rare-earth-based high-performance Gd5Si2Ge2 materials.