论文标题
沮丧的Quasi One维抗Fiferromagnet Srcute $ _2 $ o $ _6 $的磁性和磁性结构
Magnetic properties and magnetic structure of the frustrated quasi-one-dimensional antiferromagnet SrCuTe$_2$O$_6$
论文作者
论文摘要
单晶立方srcute $ _2 $ o $ _6 $上的磁化测量值，具有三个不等的高对称方向$ [100] $，$ [110] $和$ [111] $的施加磁场显示弱的磁性磁极素。磁敏感性的拟合度与海森贝格旋转链模型上的量子蒙特卡洛模拟有关，该链条是通过主要的第三名最高 - 邻居交换$ j_3 $形成的，在50.12（7）$ $ [110.12）$ [110.22] $ [110.22] $ [J_3/k_b）$（J_3/k_b）产生链内交互$ J3 $ [110] $ []大约2.2的$ g $ factor。单晶中子衍射揭示了向磁有序状态的过渡，这是由$ t_ \ textrm {n1} = 5.25（9）$ k的磁性bragg强度的发作所证明的，在$ t_ \ textrm {n2} $之前没有第二个过渡的异常。基于粉末和单晶中子衍射数据的不可约形表示理论和磁性空间组分析，Shubnikov太空集团的磁结构$ p4_132 $，其中Cu $^{2+} $〜$〜$ s = 1/2 $ spins spins antifermagnets Antifermagnet在Antypers perpentically perpenticular perpendicular in Dorighticular perpendicular to perpendicular to the Spin Chain spin cline spin spin spin asspossed。测量的订购矩$ 0.52（6）〜μb $，代表$ 1〜μb $的预期价值降低48％，这表明$ J_1 $和$ J_2 $债券造成的挫败感的剩余影响。
Magnetization measurements on single-crystal cubic SrCuTe$_2$O$_6$ with an applied magnetic field of along three inequivalent high symmetry directions $[100]$, $[110]$, and $[111]$ reveal weak magnetic anisotropy. The fits of the magnetic susceptibility to the result from a quantum Monte Carlo simulation on the Heisenberg spin-chain model, where the chain is formed via the dominant third-nearest-neighbor exchange interaction $J_3$, yield the intra-chain interaction $(J_3/k_B)$ between 50.12(7) K for the applied field along $[110]$ and 52.5(2) K along $[100]$ with about the same $g$-factor of 2.2. Single-crystal neutron diffraction unveils the transition to the magnetic ordered state as evidenced by the onset of the magnetic Bragg intensity at $T_\textrm{N1}=5.25(9)$ K with no anomaly of the second transition at $T_\textrm{N2}$ reported previously. Based on irreducible representation theory and magnetic space group analysis of powder and single-crystal neutron diffraction data, the magnetic structure in the Shubnikov space group $P4_132$, where the Cu$^{2+}$~$S=1/2$ spins antiferromagnetically align in the direction perpendicular to the spin chain, is proposed. The measured ordered moment of $0.52(6)~μ_B$, which represents 48% reduction from the expected value of $1~μ_B$, suggests the remaining influence of frustration resulting from the $J_1$ and $J_2$ bonds.
