Eutectoid Flux Growth and Physical Properties of Single Crystal Ln117Ni54–ySn112–z (Ln = Gd–Dy)

Ln117Ni53–ySn112–z (Ln = Gd–Dy) have been
grown via the eutectoid flux growth method, characterized using single
crystal X-ray diffraction, and determined to have a face centered
cubic unit cell with lattice parameters of a = 30.070(4),
29.862(5), and 29.823(4) Å for the Gd, Dy, and Tb analogues.
The compounds contain over 1100 atoms per unit cell with a complex
bonding network and multiple magnetic sublattices. In addition, disorder
is prevalent throughout the structure. These physical characteristics
are ideal when searching for ultralow thermal conductivity materials.
Magnetic susceptibility and electrical properties are presented, and
all analogues exhibit positive Curie–Weiss constants, suggesting
ferromagnetic interactions in each compound, in addition to a spin-glass
component to the magnetic behavior.

采用共晶反应法生长的Ln117Ni53–ySn112–z（其中Ln代表Gd-Dy系列元素）合金，经单晶X射线衍射分析，被证实具有面心立方晶格结构，其晶格参数分别为Gd、Dy和Tb同位素的a = 30.070(4)、29.862(5)和29.823(4) Å。这些化合物在每个晶胞中包含超过1100个原子，具有复杂的键合网络和多个磁性亚晶格。此外，整个结构中普遍存在无序现象。这些物理特性使其成为寻找超低热导率材料的理想选择。同时，展示了磁化率和电学性质，所有同位素均表现出正的居里-外斯常数，表明在每个化合物中均存在铁磁性相互作用，并伴随有自旋玻璃性质的磁性行为。