The giant and moderate magnetocaloric effect in Ni50Mn35Sn15 for room-temperature refrigeration technology

The magnetocaloric effect (MCE) of Ni₅₀Mn₃₅Sn₁₅ is investigated via phenomenological model (PM) at temperatures, ranging from around 5 K–400 K, validating both inversely and conventionally MCEs, corresponding to two magnetic transitions. Magnetic entropy change (ΔS_M) is maximized at the antiferromagnetic transition in martensitic state with 14.5 J/kg.K, which is similar to prior work, demonstrating that PM is a good model for studying giant inverse MCE. However, |ΔS_M| is maximized with 2.5 J/kg.K at the FM transition in the austenitic state. Consequently, PM is a particularly intriguing model in which both inverse MCE and conventional MCE for a single material at different temperatures can be examined. Ni₅₀Mn₃₅Sn₁₅ is an efficient material for MR technology throughout widely temperature range, particularly ambient temperature and some temperature ranges that are near ambient temperature.