论文标题
混合系统$ CS_3CU_3CL_ {8-X} br_xoh $ with severed Connected Cu-Triangles
Mixed system $Cs_3Cu_3Cl_{8-x}Br_xOH$ with weakly connected Cu-triangles
论文作者
论文摘要
为了研究具有弱耦合的Cu-Triangles的低维自旋系统的性质及其晶体结构，$ CS_3CU_3CL_8OH $（1）的单晶与新的$ CS_3CU_3CL_ {7.6} br_ {0.4} br_ {0.4} OH $（2）OH $（2）。这两种化合物都是等值的，并在单斜结构中结晶，带有空间$ $ p2_1/c $。 （1）的磁敏感性显示为$ 2.23 K $，（2）为$ 2.70 k $，这归因于抗磁相变。此外，两种化合物沿$ b $轴沿$ 1.9 k $的磁化表明，旋转飞机过渡到新的抗铁磁阶段。 （1）的过渡为$ 0.61 T $，（2）的价格为$ 2.0 t $。磁场$ b_ {c1} = 1.1 t $（1）和$ b_ {c2} = 1.2 t $（2）可以抑制抗铁磁序。在不同温度下在（1）上测得的第一个单晶中子衍射显示在（-1 0 0）核反射顶部的磁信号。发现其磁性订购温度在$ t_ {n1} = 2.12（3）k $。
To study the relationship between the properties of low-dimensional spin systems with weakly coupled Cu-triangles and their crystal structure, single crystals of $Cs_3Cu_3Cl_8OH$ (1) and the new $Cs_3Cu_3Cl_{7.6}Br_{0.4}OH$ (2) were grown. Both compounds are isostructural and crystallize in a monoclinic structure with space group $P2_1/c$. The magnetic susceptibility of (1) shows a maximum at $2.23 K$ and of (2) at $2.70 K$, which are attributed to antiferromagnetic phase transitions. Furthermore, the magnetization along the $b$-axis at $1.9 K$ for both compounds shows a spin-flop transition into a new antiferromagnetic phase. This transition occurs at $0.61 T$ for (1) and at $2.0 T$ for (2). The antiferromagnetic order can be suppressed by a magnetic field $B_{C1}= 1.1 T$ for (1) and $B_{C2}= 1.2 T$ for (2). First single crystal neutron diffraction measured on (1) at different temperatures reveals the magnetic signal on the top of the nuclear reflection at (-1 0 0). Its magnetic ordering temperature was found to be at $T_{N1}= 2.12(3) K$.
