Controlling the stoichiometry of the triangular lattice antiferromagnet Li1+xZn2-yMo3O8
Controlling the stoichiometry of the triangular lattice antiferromagnet Li1+xZn2-yMo3O8
复制标题
控制三角晶格反铁磁体 Li1 xZn2-yMo3O8 的化学计量
DOI：
10.1016/j.jssc.2018.12.064
复制
发表时间：
2019
影响因子：
3.3
通讯作者：
Sato Taku J.
中科院分区：
文献类型：
--
作者：
Sandvik Kim E.;Okuyama Daisuke;Nawa Kazuhiro;Avdeev Maxim;Sato Taku J.
Li 1 + xZn 2 − yMo 3 O 8的化学计量的控制通过固态反应实现。我们发现，最好的样品，具有的化学成分Li 0。95（4）Zn1. 92（8）Mo 3 O 8是从起始标称组成Li：Zn：Mo：O=（1+ w）：（2.8-w）：3：8.6（w=-0.1）获得的，表明化学计量比与早期报道中的那些相比有了很大的改进。对于更大的w详细的结构分析表明，Li和Zn的混合位点优先被Li原子占据，以及非磁性第二相Zn 2 Mo 3 O 8的分数减少。在100< T< 200 K的温度范围内，改进的化学计量比粉末样品的磁化率出现一个宽峰。这表明在高温下反铁磁相关性的发展是固有的理想化学计量LiZn 2 Mo 3 O 8。
The control of the stoichiometry of Li1+ xZn2− yMo3O8 was achieved by the solid-state-reaction. We found that the best sample that has the chemical composition Li0. 95 (4) Zn1. 92 (8) Mo3O8 was obtained from the starting nominal composition with Li: Zn: Mo: O=(1+ w):(2.8− w): 3: 8.6 with w=− 0.1, indicating that the stoichiometry is greatly improved compared to those in the earlier reports. For larger w detailed structural analysis indicates that the mixed sites of Li and Zn are preferentially occupied by Li atoms, as well as the fraction of the non-magnetic secondary phase Zn2Mo3O8 decreases. Magnetic susceptibility of the improved stoichiometry powder samples shows a broad hump in the temperature range of 100< T< 200 K. This suggests that the development of antiferromagnetic correlations at the high temperatures is inherent to the ideal stoichiometric LiZn2Mo3O8.