Interplanar Ferromagnetism Enhanced Ultrawide Zero Thermal Expansion in Kagome Cubic Intermetallic (Zr,Nb)Fe2.
Interplanar Ferromagnetism Enhanced Ultrawide Zero Thermal Expansion in Kagome Cubic Intermetallic (Zr,Nb)Fe2.
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DOI：
10.1021/jacs.3c03160
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发表时间：
2023-07
影响因子：
15
通讯作者：
Yanming Sun;Yili Cao;Shixin Hu;M. Avdeev;Chin-wei Wang;S. Khmelevskyi;Yang Ren;S. Lapidus;Xin Chen;Qiang Li;J. Deng;Jun Miao;K. Lin;X. Kuang;X. Xing
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文献类型：
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作者：
Yanming Sun;Yili Cao;Shixin Hu;M. Avdeev;Chin-wei Wang;S. Khmelevskyi;Yang Ren;S. Lapidus;Xin Chen;Qiang Li;J. Deng;Jun Miao;K. Lin;X. Kuang;X. Xing
在宽温度窗口内表现出零热膨胀（ZTE）的立方金属在广泛的先进技术中展示了重要的应用，但在自然界中极其罕见。在这里，通过高温合成，我们实现了可调的热膨胀，通过磁掺杂在类戈薇立方（Fd-3 M）金属间化合物（Zr，Nb）Fe 2。在4 ~ 425 K的范围内，ZTE的热膨胀系数可忽略不计（+0.47 × 10-6 K-1），几乎比大多数金属ZTE的热膨胀系数都要大。结合原位磁化，中子粉末衍射和超精细穆斯堡尔谱分析表明，晶面间铁磁有序有助于冷却时正常晶格收缩的大磁补偿。微量Fe掺杂引入了额外的磁交换作用，明显提高了铁磁性和磁有序温度，从而产生了这样一个超宽的ZTE。这项工作提出了一个有前途的中兴通讯在可果美金属材料。
A cubic metal exhibiting zero thermal expansion (ZTE) over a wide temperature window demonstrates significant applications in a broad range of advanced technologies but is extremely rare in nature. Here, enabled by high-temperature synthesis, we realize tunable thermal expansion via magnetic doping in the class of kagome cubic (Fd-3m) intermetallic (Zr,Nb)Fe2. A remarkably isotropic ZTE is achieved with a negligible coefficient of thermal expansion (+0.47 × 10-6 K-1) from 4 to 425 K, almost wider than most ZTE in metals available. A combined in situ magnetization, neutron powder diffraction, and hyperfine Mössbauer spectrum analysis reveals that interplanar ferromagnetic ordering contributes to a large magnetic compensation for normal lattice contraction upon cooling. Trace Fe-doping introduces extra magnetic exchange interactions that distinctly enhance the ferromagnetism and magnetic ordering temperature, thus engendering such an ultrawide ZTE. This work presents a promising ZTE in kagome metallic materials.