Investigation of the triple peak magnetocaloric effects of Ni45Mn44Sn11 ribbons

The magnetocaloric effect (MCE) of Ni45Mn44Sn11 ribbons is simulated, with temperatures ranging from nearly 0 K to 313 K. The MCE of these ribbons exhibits triple peak behavior. Amazingly, three co-occurring peaks of both the inverse and conventional MCEs are found, one for each magnetic transition. Except for temperatures between 251 K and 273 K that correspond to an antiferromagnetic transition that shows an inverse MCE, the type of MCE in Ni45Mn44Sn11 ribbons is conventional. Consequently, materials with triple-peak MCE behavior, such as Ni45Mn44Sn11 ribbons, may provide a fascinating opportunity to obtain magnetic cooling over a wider temperature range than with conventional refrigerant materials, particularly Ni45Mn44Sn11 ribbons, which are inexpensive for use in magnetic refrigeration. Therefore, Ni45Mn44Sn11 ribbons are excellent magnetocaloric magnets for wide temperature ranges, including cryogenic and room temperatures.