Adiabatic magnetocaloric effect in Ni50Mn35In15 ribbons
Adiabatic magnetocaloric effect in Ni50Mn35In15 ribbons
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DOI：
10.1063/1.4968592
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发表时间：
2016-11
影响因子：
4
通讯作者：
P. Álvarez-Alonso;C. Aguilar-Ortiz;J. Camarillo;D. Salazar;H. Flores-Zúñiga;V. Chernenko
中科院分区：
文献类型：
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作者：
P. Álvarez-Alonso;C. Aguilar-Ortiz;J. Camarillo;D. Salazar;H. Flores-Zúñiga;V. Chernenko
Heusler型Ni-Mn基变磁形状记忆合金（MetaMSMA）是一种很有前途的磁制冷材料。为了提高热交换率和冷却效率，材料应该具有高的表面/体积比。本文选用典型的Ni_（50）Mn_（35）In_（15）金属间化合物形状记忆合金，采用快淬法制备薄带。通过量热法、X射线衍射、扫描电子显微镜和热磁化测量确定了薄带的特征转变。通过绝热法（ΔTad）直接测量了与马氏体相变（MT）和奥氏体铁磁相变（TCA）相关的逆磁热效应（MCE），并通过磁化强度测量估算了磁熵变间接测量了逆磁热效应和常规磁热效应。结果表明，在反MCE的MT温度为300 K附近，在μ0ΔH = 1.9 T时，带的ΔTad = −1.1 K，而在常规MCE的MT温度为2.3 K时，带的ΔTad = 2.3 K。
Heusler-type Ni-Mn-based metamagnetic shape memory alloys (MetaMSMAs) are promising candidates for magnetic refrigeration. To increase heat exchange rate and efficiency of cooling, the material should have a high surface/volume ratio. In this work, the typical Ni50Mn35In15 MetaMSMA was selected to fabricate thin ribbons by melt-spinning. The characteristic transformations of the ribbons were determined by calorimetry, X-ray diffraction, scanning electron microscopy and thermomagnetization measurements. The inverse and conventional magnetocaloric effects (MCEs) associated with the martensitic transformation (MT) and the ferromagnetic transition of the austenite (TCA), respectively, were measured directly by the adiabatic method (ΔTad) and indirectly by estimating the magnetic entropy change from magnetization measurements. It is found that the ribbons exhibit large values of ΔTad = −1.1 K at μ0ΔH = 1.9 T, in the vicinity of the MT temperature of 300 K for inverse MCE, and ΔTad = 2.3 K for conventional MCE ...