Secondary-field boosted caloric effect associated with first-order phase transition, a quasi-direct measurement

Secondary-field boosted caloric effect associated with first-order phase transition, a quasi-direct measurement
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与一阶相变相关的二次场增强热量效应,一种准直接测量

DOI:
10.1016/j.scriptamat.2022.114836
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发表时间:
2022
期刊:
影响因子:
6
通讯作者:
Yuping Sun
Yuping Sun
中科院分区:
材料科学1区
文献类型:
--
作者:
Kun Tao;Wenhai Song;Peng Tong;Tingjiao Xiong;Tianyang Wang;Xuekai Zhang;Lulu Xie;Jianchao Lin;Yuping Sun

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源自外部场触发的固态相变的热量冷却被认为是基于蒸汽表达的传统制冷技术的绿色高效替代方案。如果在相变处耦合多个自由度,则可以通过多重刺激来刺激热量效应。然而,表征多场下的热量效应仍然具有挑战性。在这里,我们提出了一种在磁场和静水压力相结合的情况下测量热量效应的准直接方法。通过以适当的顺序组合两个外场,Mn 0.6 Fe 0.4 NiSi 0.5 Ge 0.5 合金的可逆热效应显着增强。我们的方法可以扩展到研究其他多铁材料中的多热量效应,并促进固态制冷在实际应用中的发展。
Caloric cooling originating from solid-state phase transition triggered by external fields is identified to be a green and efficient alternative to the traditional refrigeration technology based on vapor expression. If multi degrees of freedoms are coupled at the phase transition, the caloric effect can be stimulated by multi stimuli. However, characterizing the caloric effect under multi fields is still challenging. Here, we proposed a quasi-direct method for caloric effect measurements under the combination of magnetic field and hydrostatic pressure. By combining two external fields in a proper sequence, the reversible caloric effect of Mn 0.6 Fe 0.4 NiSi 0.5 Ge 0.5 alloy was markedly enhanced. Our method can be expanded to study the multicaloric effect in other multiferroic materials and promote the development of solid-state refrigeration in practical applications.
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