论文标题
Cecosi隐藏有序阶段的结构过渡
Structural Transition in the Hidden Ordered Phase of CeCoSi
论文作者
论文摘要
我们已经在单个晶体Cecosi上进行了X射线衍射实验，以研究$ T_0 \ SIM 12 $ K的未解决有序相。可以通过施加磁场来选择结构域，表明在$ T_0 $以下的隐藏有序阶段中存在某些电子订购并影响磁各向异性。 $ t_0 $的过渡虽然订单参数仍然未知，但与$ c $ - 轴晶格参数中的最大值相关联。在$ [1、0、0] $的磁场中，结构过渡温度，称为$ t _ {\ text {s1}} $，偏离$ t_0 $，随着场地的增加而减小，而$ t_0 $增加。这表明没有三斜变形的隐藏有序阶段存在于$ t _ {\ text {s1}} $和$ t_0 $之间。还报告了$ h \ parallel [1，1，0] $的结果。
We have performed X-ray diffraction experiments on a single crystalline CeCoSi to investigate the unresolved ordered phase below $T_0 \sim 12$ K. We have discovered that a triclinic lattice distortion takes place below $T_0$, which is further modified in the subsequent antiferromagnetic ordered phase. The structural domains can be selected by applying a magnetic field, indicating that some electronic ordering exists behind and affects the magnetic anisotropy in the hidden ordered phase below $T_0$. The transition at $T_0$, although the order parameter is still unknown, is associated with the maximum in the $c$-axis lattice parameter. In magnetic fields along $[1, 0, 0]$, the structural transition temperature, named as $T_{\text{s1}}$, deviates from $T_0$ and decreases with increasing the field, whereas $T_0$ increases. This shows that the hidden ordered phase without triclinic distortion exists between $T_{\text{s1}}$ and $T_0$. The results for $H \parallel [1, 1, 0]$ are also reported.
