arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1702.02660cond-mat.str-elcond-mat.mtrl-sci
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具有4个$d^1$自旋的$J_1-J_2$正方晶格海森堡反铁磁体:AMoOPO $_4$ Cl(A = K,Rb)

$J_1-J_2$ Square-Lattice Heisenberg Antiferromagnets with 4$d^1$ spins: AMoOPO$_4$Cl (A = K, Rb)

Hajime Ishikawa, Nanako Nakamura, Makoto Yoshida, Masashi Takigawa, Peter Babkevich, Navid Qureshi, Henrik M. Rønnow, Takeshi Yajima, Zenji Hiroi

摘要:

通过单晶的磁化强度、热容、核磁共振测量,结合粉末中子衍射实验,研究了含Mo $^{5+}$离子的4 $d^1$电子组态的AMoOPO $_4$ Cl(A = K,Rb)的磁性.磁化强度测量表明,它们是自旋为1/2的$J_1-J_2$正方晶格磁体的良好模型化合物,具有第一和第二近邻相互作用。磁性转变观察到在约6和8 K的K和Rb化合物,分别。与正常的Néel型反铁磁有序相反,NMR和中子衍射实验发现每个化合物都有一个柱状反铁磁有序,它由一个占主导地位的反铁磁$J_2$稳定。这两种化合物都实现了两个相互渗透的$J_2$正方形晶格通过$J_1$彼此弱耦合的不寻常情况。

英文摘要:

Magnetic properties of AMoOPO$_4$Cl (A = K, Rb) with Mo$^{5+}$ ions in the 4$d^1$ electronic configuration are investigated by magnetization, heat capacity and NMR measurements on single crystals, combined with powder neutron diffraction experiments. The magnetization measurements reveal that they are good model compounds for the spin-1/2 $J_1-J_2$ square lattice magnet with the first and second nearest-neighbor interactions. Magnetic transitions are observed at around 6 and 8 K in the K and Rb compounds, respectively. In contrast to the normal Néel-type antiferromagnetic order, the NMR and neutron diffraction experiments find a columnar antiferromagnetic order for each compound, which is stabilized by a dominant antiferromagnetic $J_2$. Both compounds realize the unusual case of two interpenetrating $J_2$ square lattices weakly coupled to each other by $J_1$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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