The synthesis and single crystal growth of a novel rare-earth high entropy oxide (Yb${}_{0.2}$Tb${}_{0.2}$Gd${}_{0.2}$Dy${}_{0.2}$ Er${}_{0.2}{)}_2$Ti${}_2$O${}_7$ in the cubic pyrochlore phase $Fd\stackrel{-}{3}m$ has been achieved using solid-state reaction and optical floating zone growth techniques. X-ray diffraction and a structure refinement analysis confirm a single-phase pyrochlore structure and lattice parameter of $a $= 10.1152(3) {}. Additional characterization techniques including scanning transmission electron microscopy (STEM) and nanoscale electron-energy loss spectroscopy mapping (EELS) support a single-phase pyrochlore structure with a homogeneous mixture down to ~ 2.3 nm. Magnetization measurements on a single crystal show antiferromagnetic correlations with a spin-glass ground state. To the best of our knowledge, this is the first reported single crystal growth of a rare-earth high entropy oxide with the pyrochlore structure.~ …

中文翻译：

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高熵稀土烧绿石氧化物的合成，表征和单晶生长

新型稀土高熵氧化物（Yb）的合成与单晶生长${}_{0.2}$b${}_{0.2}$d${}_{0.2}$镝${}_{0.2}$ 尔${}_{0.2}{）}_2$钛${}_2$Ø${}_7$ 在立方烧绿石相中 $Fd\stackrel{-}{3}米$使用固态反应和光学浮区生长技术已经实现了。X射线衍射和结构细化分析证实了单相烧绿石结构和晶格参数$ a $ = 10.1152（3）{}。其他特征化技术包括扫描透射电子显微镜（STEM）和纳米级电子能量损失谱图（EELS），支持单相烧绿石结构，均匀混合物低至〜2.3 nm。在单晶上的磁化测量显示出与自旋玻璃基态的反铁磁相关性。据我们所知，这是首次报道具有烧绿石结构的稀土高熵氧化物的单晶生长。