当前位置：
X-MOL 学术
›
Chem. Sci.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Synthesis of a d2 kagome lattice antiferromagnet, (CH3NH3)2NaV3F12
Chemical Science ( IF 7.6 ) Pub Date : 2020-10-01 , DOI: 10.1039/d0sc03323e Ningxin Jiang 1, 2, 3, 4 , Arun Ramanathan 1, 2, 3, 4 , Ryan E. Baumbach 4, 5, 6 , Henry S. La Pierre 1, 2, 3, 4, 7
Chemical Science ( IF 7.6 ) Pub Date : 2020-10-01 , DOI: 10.1039/d0sc03323e Ningxin Jiang 1, 2, 3, 4 , Arun Ramanathan 1, 2, 3, 4 , Ryan E. Baumbach 4, 5, 6 , Henry S. La Pierre 1, 2, 3, 4, 7
Affiliation
|
The ground-state of S = 1 kagome lattice antiferromagnets (KLAFs), in the presence of strong geometric frustration and the smallest integer spin, has the potential to host a range of non-trivial magnetic phases including a quantum spin liquid. The effect of local geometry and metal-ion electronic structure on the formation of these predicted phases remain unknown due to, in part, the lack of an ideal analyte. Herein, a kagome lattice compound, (CH3NH3)2NaV3F12 (1-V), featuring a single distinct V3+ (d2) site in the R![[3 with combining macron]](https://www.rsc.org/images/entities/char_0033_0304.gif)
m space group, was synthesized hydrothermally. In this S = 1, d2 system, the trivalent vanadium ions are tetragonally compressed due to Jahn–Teller distortion. The interlayer methylammonium cations show static positional disorder with three possible orientations. The negative Curie–Weiss temperature and dominant antiferromagnetic interactions make 1-V a candidate to study S = 1 KLAF physics. The frequency-dependence of ac magnetic susceptibility and the heat capacity results suggest that 1-V has a spin glass ground state. This freezing of the spin dynamics may be due to competing exchange interactions, structural imperfection arising from the static disorder of the interlayer methylammonium cations or the presence of ‘defect’-like spins.
中文翻译：
d2 kagome晶格反铁磁体（CH3NH3）2NaV3F12的合成
S = 1个戈戈姆晶格反铁磁体（KLAFs）的基态在存在强烈的几何挫败感和最小的整数自旋的情况下，有可能拥有一系列非平凡的磁性相，包括量子自旋液体。部分由于缺乏理想的分析物，局部几何形状和金属离子电子结构对这些预测相形成的影响仍然未知。此处，是一种在R m中具有单个不同的V 3+（d 2）位的裙果形晶格化合物（CH 3 NH 3）2 NaV 3 F 12（1-V）。空间群是水热合成的。在此S = 1 d 2系统中，由于Jahn–Teller畸变，三价钒离子被四方压缩。层间甲基铵阳离子显示具有三个可能取向的静态位置无序。负居里–魏斯温度和主要的反铁磁相互作用使1-V成为研究S = 1 KLAF物理学的候选人。交流磁化率与热容量的频率相关性表明1-V具有自旋玻璃基态。自旋动力学的这种冻结可能是由于竞争性的交换相互作用，由于层间甲基铵阳离子的静态无序或“缺陷”样自旋的存在而引起的结构缺陷。
更新日期：2020-10-12
m space group, was synthesized hydrothermally. In this S = 1, d2 system, the trivalent vanadium ions are tetragonally compressed due to Jahn–Teller distortion. The interlayer methylammonium cations show static positional disorder with three possible orientations. The negative Curie–Weiss temperature and dominant antiferromagnetic interactions make 1-V a candidate to study S = 1 KLAF physics. The frequency-dependence of ac magnetic susceptibility and the heat capacity results suggest that 1-V has a spin glass ground state. This freezing of the spin dynamics may be due to competing exchange interactions, structural imperfection arising from the static disorder of the interlayer methylammonium cations or the presence of ‘defect’-like spins.
中文翻译：
d2 kagome晶格反铁磁体（CH3NH3）2NaV3F12的合成
S = 1个戈戈姆晶格反铁磁体（KLAFs）的基态在存在强烈的几何挫败感和最小的整数自旋的情况下，有可能拥有一系列非平凡的磁性相，包括量子自旋液体。部分由于缺乏理想的分析物，局部几何形状和金属离子电子结构对这些预测相形成的影响仍然未知。此处，是一种在R m中具有单个不同的V 3+（d 2）位的裙果形晶格化合物（CH 3 NH 3）2 NaV 3 F 12（1-V）。
空间群是水热合成的。在此S = 1 d 2系统中，由于Jahn–Teller畸变，三价钒离子被四方压缩。层间甲基铵阳离子显示具有三个可能取向的静态位置无序。负居里–魏斯温度和主要的反铁磁相互作用使1-V成为研究S = 1 KLAF物理学的候选人。交流磁化率与热容量的频率相关性表明1-V具有自旋玻璃基态。自旋动力学的这种冻结可能是由于竞争性的交换相互作用，由于层间甲基铵阳离子的静态无序或“缺陷”样自旋的存在而引起的结构缺陷。
京公网安备 11010802027423号