当前位置: X-MOL 学术J. Chin. Chem. Soc. › 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.)
Charge transfer enhanced magnetic correlations in type‐II multiferroic Co3TeO6
Journal of the Chinese Chemical Society ( IF 1.8 ) Pub Date : 2020-12-10 , DOI: 10.1002/jccs.202000472
Chi‐Hung Lee, Erdembayalag Batsaikhan, Ma‐Hsuan Ma, Wen‐Hsien Li, Chin‐Wei Wang, Chun‐Min Wu, Hung‐Duen Yang, Jeffrey W. Lynn, Helmuth Berger

Magnetic structure of the Co ions in monoclinic Co3TeO6 in the antiferroelectric state at 16 K has been determined by neutron powder together with single‐crystal diffractions. The indices of the magnetic reflections that appear at the incommensurate positions were determined by diffractions from a single crystal, which allow to uniquely identify the magnetic modulation vector. There are two crystallographically distinct Co layers. Magnetic incommensurability appears in the Co spins in the layers comprising zig‐zag chains, with a magnetic modulation vector of (0.357, 0.103, 0.121) at 3 K but changes to (0.4439, 0, 0.137) at 16 K, while the Co ions in the honeycomb webs form a collinear antiferromagnetic structure. Thermal reduction rate of the Co moments in the honeycomb webs was found to be much smaller than those in the zig‐zag chains. Shifting of large amounts of electronic charge into the CoO bonds in the honeycomb webs on warming is used to understand the behavior.

中文翻译:

II 型多铁性 Co3TeO6 中的电荷转移增强了磁相关性

通过中子粉和单晶衍射测定了 16 K 反铁电态单斜晶系 Co 3 TeO 6中 Co 离子的磁性结构。出现在不相称位置的磁反射指数是通过单晶的衍射来确定的,这可以唯一地识别磁调制矢量。有两个晶体学上不同的钴层。磁不可通约性出现在锯齿链层中的 Co 自旋中,3 K 时磁调制矢量为 (0.357, 0.103, 0.121),但在 16 K 时变为 (0.4439, 0, 0.137),而 Co 离子蜂窝状网中形成共线反铁磁结构。研究发现蜂窝状网中 Co 矩的热还原率远小于锯齿形链中的 Co 矩的热还原率。在变暖过程中,大量电子电荷转移到蜂窝网中的 Co - O 键中,用于理解这种行为。
更新日期:2020-12-10
down
wechat
bug