Structural voids are a defining feature of the half-Heusler structure. Using temperature-dependent neutron diffraction, complemented by room-temperature X-ray diffraction and high-resolution neutron diffraction as well as calorimetry and macroscopic magnetization measurements, the disordering of these vacancies is followed across the Cl_b–L2₁ transition in samples of Ni1+𝑥MnSb${\text{Ni}}_{1+x}\text{MnSb}$ for various Ni excesses x. The thermal vacancy concentration increases toward high temperatures, and excess vacancy concentrations large enough to increase the low-temperature macroscopic magnetization can be retained by quenching. Finally, the consequences of the strongly differing relaxation rates of order and vacancy concentrations are demonstrated, showing that in these and related systems the thermal history potentially determines material properties such as ordering temperatures much more strongly than usually.

中文翻译：

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Ni1+x MnSb 中半赫斯勒到全赫斯勒跃迁的原子序

结构空隙是半赫斯勒结构的定义特征。使用与温度相关的中子衍射，辅以室温 X 射线衍射和高分辨率中子衍射以及量热法和宏观磁化强度测量，这些空位的无序在样品中的 Cl _b -L2 ₁跃迁中得到跟踪。你1 + 𝑥锰锑${\text{Ni}}_{1+x}\text{MnSb}$对于各种 Ni 过量x。热空位浓度向高温方向增加，并且足够大以增加低温宏观磁化强度的过量空位浓度可以通过淬火来保持。最后，证明了有序和空位浓度的显着不同弛豫率的后果，表明在这些和相关系统中，热历史可能比通常更强烈地决定材料特性，例如有序温度。