扭矩测量揭示的CaCo $_{2}$ As $_{2}$中的自旋翻转转变和磁性phase diagram
Spin-flop transition and magnetic phase diagram in CaCo$_{2}$As$_{2}$ revealed by torque measurements
摘要：
采用直流磁化强度和磁矩测量方法系统研究了CaCo $_{2}$ As $_{2}$单晶的磁性能。顺磁到反铁磁的转变发生在$T_N$ = 74 K与Co自旋平行于c轴对齐。对于$H \parallel c$，观察到低于$T_N$的场诱导自旋翻转转变，并从磁化强度和磁矩的详细分析推断出从反铁磁到顺磁的磁性转变。最后，我们总结了基于我们的结果在\emph{H-T}平面上的CaCo $_{2}$ As $_{2}$的磁相图。
英文摘要：
The magnetic properties of CaCo$_{2}$As$_{2}$ single crystal was systematically studied by using dc magnetization and magnetic torque measurements. A paramagnetic to antiferromagnetic transition occurs at $T_N$ = 74 K with Co spins being aligned parallel to the c axis. For $H \parallel c$, a field-induced spin-flop transition was observed below $T_N$ and a magnetic transition from antiferromagnetic to paramagnetic was inferred from the detailed analysis of magnetization and magnetic torque. Finally, we summarize the magnetic phase diagram of CaCo$_{2}$As$_{2}$ based on our results in the \emph{H-T} plane.
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