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

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• 作者：Jingmin Wang ; ^{jingmin@buaa.edu.cn} ; Qian Yu ; Kangyi Xu ; Chi Zhang ; Yuye Wu ; Chengbao Jiang ; ^{jiangcb@buaa.edu.cn}
• 关键词：Magnetic shape memory alloys (MSMAs) ; Elastocaloric effect (eCE) ; Magnetostructural transition
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：148-151
• 全文大小：756 K
• 卷排序：130

文摘

The elastocaloric effect (eCE) is studied in a Ni57Mn18Ga21In4 alloy 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 ΔTad up 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.