Large room-temperature elastocaloric effect of Ni57Mn18Ga21In4 alloy undergoing a magnetostructural coupling transition

Large room-temperature elastocaloric effect of Ni57Mn18Ga21In4 alloy undergoing a magnetostructural coupling transition
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Ni57Mn18Ga21In4合金磁结构耦合转变的大室温弹热效应

DOI:
10.1016/j.scriptamat.2016.11.024
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发表时间:
2017-03
期刊:
影响因子:
6
通讯作者:
Chengao Jiang
Chengao Jiang
中科院分区:
材料科学1区
文献类型:
--
作者:
Jingmin Wang;Qian Yu;Kangyi Xu;Chi Zhang;Yuye Wu;Chengao Jiang

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研究了顺磁性奥氏体(PMA)向铁磁性马氏体(FMM)转变过程中ni57mn18ga21in4合金的弹热效应(eCE)。超弹性与应力诱导的从PMA到FMM的转变有关,在室温下实现。同时,检测到温度变化ΔTadup至9.6 K的大eCE。结果表明,晶格振动和磁化强度的变化都对大eCE有积极作用。这项工作为同时施加磁场和偏置应力来调整eCE提供了可能。
The elastocaloric effect (eCE) is studied in a Ni57Mn18Ga21In4alloy undergoing the magnetostructural transition from paramagnetic austenite (PMA) to ferromagnetic martensite (FMM). Superelasticity associated with the stress-induced transition from PMA to FMM is realized at room temperature. Simultaneously, a large eCE marked by a temperature change ΔTadup to 9.6 K is detected. It is revealed that both the lattice vibration and magnetization change positively contribute to the large eCE. This work may open the possibility of tuning the eCE by simultaneous application of magnetic field and bias stress.
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