Tunable near-zero thermal expansion in the C-doped La(Fe, Si)13 compounds at cryogenic temperatures
Tunable near-zero thermal expansion in the C-doped La(Fe, Si)13 compounds at cryogenic temperatures
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DOI：
10.1016/j.matlet.2018.11.055
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发表时间：
2019-02
影响因子：
3
通讯作者：
Wei Wang-;Rongjin Huang;Hailin Dai;Y. Shan;Yuqiang Zhao;Shibin Guo;Chuanjun Huang;Laifeng Li
中科院分区：
文献类型：
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作者：
Wei Wang-;Rongjin Huang;Hailin Dai;Y. Shan;Yuqiang Zhao;Shibin Guo;Chuanjun Huang;Laifeng Li
可控的热膨胀特性为设计具有理想热膨胀系数的材料提供了一种方法。本文报道了C掺杂La（Fe，Si）13化合物在宽工作温度范围（77-260 K）内的零热膨胀（ZTE）可调特性。研究了间隙C原子对LaFe 10.0Si 3.0Cx（x = 0，0.2，0.3，0.4）化合物热膨胀和磁性能的影响。进一步的磁性分析表明，La（Fe，Si）13基化合物的ZTE行为归因于间隙C原子的引入引起的磁交换耦合的变化。
The controllable thermal expansion property gives us a method to design materials with desirable coefficient of thermal expansion. In this paper, we report a tunable zero thermal expansion (ZTE) in C-doped La(Fe, Si)13compounds over a wide operation-temperature window (77–260 K). The effects of the interstitial C atoms on the thermal expansion and magnetic properties of the LaFe10.0Si3.0Cx(x = 0, 0.2, 0.3, 0.4) compounds were respectively investigated. The further magnetic analysis indicates that the ZTE behaviors of this La(Fe, Si)13-based compounds are attributed to the changes of magnetic exchange couplings because of the introduction of interstitial C atoms.