论文标题
二维Van der waals Mn $ _ {1-x} $ ni $ _x $ ps $ ps $ _3 $单晶的磁相的演变
Evolution of magnetic phase in two dimensional van der Waals Mn$_{1-x}$Ni$_x$PS$_3$ single crystals
论文作者
论文摘要
金属硫代（Seleno）磷酸盐MPX $ _3 $吸引了相当大的关注，具有宽阔的跨度带隙和丰富的磁性特性。在这个系列中，两个相邻的成员MNPS $ _3 $和NIPS $ _3 $在磁原子，磁性易于轴，旋转各向异性以及最近的邻居磁相互作用方面有所不同。这些成分之间的竞争可能会引起有趣的身体现象。在本文中，报告了Mn $ _ {1-x} $ ni $ _x $ ps $ _3 $系列的磁性的演变。尽管两个最终成员的反铁磁序不兼容，但反铁磁性仍然是整个替代区域的基态。磁性排序温度$ t _ {\ rm n} $显示非单调V形行为，并且观察到x = 0.5时的重入旋转玻璃相。此外，$ t _ {\ rm n} $的异常分叉发生在x = 0.75处，这可能是由于温度依赖性的自旋重新定向或相位分离所致。我们的密度功能理论计算进一步确认了磁性的进化。我们的研究表明，当这些低维系统涉及多重自由度时，外来的磁性可能会引起人们的兴趣，这需要将来进行更深入的显微镜研究。
Metal thio(seleno)phosphates MPX$_3$ have attracted considerable attentions with wide spanned band gaps and rich magnetic properties. In this series, two neighboring members MnPS$_3$ and NiPS$_3$ differ in magnetic atoms, magnetic easy axes, spin anisotropy, as well as nearest-neighbor magnetic interactions. The competition between these components may cause intriguing physical phenomena. In this article, the evolution of magnetism of Mn$_{1-x}$Ni$_x$PS$_3$ series is reported. Despite the incompatible antiferromagnetic orders of two end members, the antiferromagnetism persists as the ground state in the whole substitution region. The magnetic ordering temperature $T_{\rm N}$ show nonmonotonic V-shape behavior, and the reentrant spin glass phase at x=0.5 is observed. In addition, abnormal bifurcation of $T_{\rm N}$ occurs at x=0.75, which may be due to the temperature-dependent spin reorientation or phase separation. The evolution of magnetism is further confirmed semi-quantitatively by our density functional theory calculations. Our study indicates that exotic magnetism can be intrigued when multi-degrees of freedom are involved in these low-dimensional systems, which call for more in-depth microscopic studies in future.
