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

IF 1.4 Q2 Physics and Astronomy

Physics Open Pub Date : 2025-08-21 DOI:10.1016/j.physo.2025.100314

Ahmed R. Galaly , Tahani R. Aldhafeeri , Sameh M. Elghnam , Mahmoud A. Hamad

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Abstract

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.

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室温制冷技术中Ni50Mn35Sn15的巨磁热效应

通过现象模型（PM）研究了Ni50Mn35Sn15在5 K - 400 K温度下的磁热效应（MCE），验证了对应于两次磁跃迁的反向和常规MCE。磁熵变化（ΔSM）在马氏体态反铁磁跃迁时达到最大值，为14.5 J/kg。K，这与前人的工作相似，表明PM是研究巨逆MCE的一个很好的模型。然而，|ΔSM|在2.5 J/kg时达到最大值。K在奥氏体态的FM转变。因此，PM是一个特别有趣的模型，其中可以检查不同温度下单一材料的逆MCE和常规MCE。Ni50Mn35Sn15是一种适用于MR技术的高效材料，适用于广泛的温度范围，特别是环境温度和一些接近环境温度的温度范围。

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