Inverse magnetocaloric effect of epitaxial Ni-Mn-Sn thin films
Inverse magnetocaloric effect of epitaxial Ni-Mn-Sn thin films
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DOI：
10.1063/1.4834357
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发表时间：
2013-11
影响因子：
4
通讯作者：
E. Yüzüak;I. Dincer;Y. Elerman;A. Auge;N. Teichert;A. Hütten
中科院分区：
文献类型：
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作者：
E. Yüzüak;I. Dincer;Y. Elerman;A. Auge;N. Teichert;A. Hütten
采用磁控溅射法制备了200 nm厚的外延Ni-Mn-Sn薄膜并沉积在MgO(100)基底上。它们揭示了在 260 K 左右发生马氏体相变的逆磁热效应。这些薄膜的磁热特性是通过在 10 至 330 K 的温度范围内施加不同磁场进行磁化测量来确定的。 μ0ΔH=1 T 时，制冷时的熵变和相对制冷功率的最大值分别为 1.6 J kg−1 K−1 和 36.5 J kg−1，制热时的熵变化和相对制冷功率的最大值分别为 1.5 J kg−1 K−1 和 33.9 J kg−1。这些数据与 Ni-Mn-Sn Heusler 合金的体积值相当。
Epitaxial Ni-Mn-Sn thin films of 200 nm thickness were prepared by magnetron sputtering and deposited onto MgO(100) substrate. They reveal an inverse magnetocaloric effect with a martensitic phase transition around 260 K. The resulting magnetocaloric properties of these films have been determined performing magnetization measurements in the temperature range between 10 and 330 K applying different magnetic fields. The maximum values of entropy change and relative cooling power are 1.6 J kg−1 K−1 and 36.5 J kg−1 for cooling and 1.5 J kg−1 K−1 and 33.9 J kg−1 for heating in μ0ΔH=1 T, respectively. These data are comparable with bulk values of Ni-Mn-Sn Heusler alloys.