论文标题
二维三角晶格抗fiferromagnet na $ _2 $ _2 $ bamn（po $ _4 $）$ _ 2 $ _ 2 $的磁相图
Magnetic phase diagram of a 2-dimensional triangular lattice antiferromagnet Na$_2$BaMn(PO$_4$)$_2$
论文作者
论文摘要
我们报告了旋转5/2的磁相变，二维三角晶格抗铁磁铁（AFM）Na $ _2 $ _2 $ bamn（po $ _4 $）$ _ 2 $。从特定的热量测量值中，我们在零磁场的温度1.15 K和1.30 K处观察到两个磁性转变。详细的交流磁化易感性测量显示了多个阶段，包括$ \ uparrow $ \ uparrow $$ \ up$ \ downarrow $（上向上） - 沿47 mk的1.9 t和2.9 t之间的磁场沿着$ c $ axis应用磁场，这意味着Na $ _2 $ _2 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _4 $ _ 2 $ _ 2 $ _ 2 $ tafical $ _4 $ _2 $ _ 2 $ 2易于轴各向异性。但是，它偏离了理想模型，这是由驼峰区域所证明的，在$ \ uparrow $$ \ uparrow $$ $$ \ downarrow $和$ v $ phasses和弱相转换之间。我们的工作提供了另一个实验示例，以研究2 $ d $ tl afm中的沮丧磁性，这也是参考，以了解在兄弟姐妹系统中观察到的可能的量子旋转液体行为和异常相图Na $ _2 $ _2 $ _2 $ _2 $ ba $ m $（po $ _4 $ _4 $ _2 $ _ 2 $ _ 2 $ = $ m $ = CO，ni）。
We report the magnetic phase transitions of a spin-5/2, 2-dimensional triangular lattice antiferromagnet (AFM) Na$_2$BaMn(PO$_4$)$_2$. From specific heat measurements, we observe two magnetic transitions at temperatures 1.15 K and 1.30 K at zero magnetic field. Detailed AC magnetic susceptibility measurements reveal multiple phases including the $\uparrow$$\uparrow$$\downarrow$ (up-up-down)-phase between 1.9 T and 2.9 T at 47 mK when magnetic field is applied along the $c$ axis, implying that Na$_2$BaMn(PO$_4$)$_2$ is a classical 2$d$ TL Heisenberg AFM with easy-axis anisotropy. However, it deviates from an ideal model as evidenced by a hump region with hysteresis between the $\uparrow$$\uparrow$$\downarrow$ and $V$-phases and weak phase transitions. Our work provides another experimental example to study frustrated magnetism in 2$d$ TL AFM which also serves as a reference to understand the possible quantum spin liquid behavior and anomalous phase diagrams observed in sibling systems Na$_2$Ba$M$(PO$_4$)$_2$ ($M$ = Co, Ni).
