Magnetostructural relationship in the tetrahedral spin-chain oxide CsCoO 2
Magnetostructural relationship in the tetrahedral spin-chain oxide CsCoO 2
复制标题
四面体自旋链氧化物CsCoO 2 中的磁结构关系
DOI：
10.1103/physrevb.91.024419
复制
发表时间：
2015
影响因子：
3.7
通讯作者：
Ali N
中科院分区：
文献类型：
--
作者：
Ali N
我们用量热测量、中子粉末衍射、密度泛函理论计算和Muon-Spin弛豫测量研究了结构和磁跃迁。在424K显示出三维长程反铁磁(AFM)有序，导致铁磁有序的Co-Co自旋二聚体的链反铁磁排列。虽然结构转变ATK周围的磁性结构没有变化，但由此产生的角共用Co-O-Co键角的分叉导致了沿链的一组键的AFM相互作用减弱。因此，系统在冷却时经历了一个复杂的冻结出松弛过程。
We have investigated the structural and magnetic transitions inusing calorimetric measurements, neutron powder diffraction, density functional theory calculations, and muon-spin relaxation measurements.exhibits three-dimensional long-range antiferromagnetic (AFM) order at 424 K, resulting in antiferromagnetic alignment of chains of ferromagnetically ordered Co-Co spin dimers. Although there is no change in magnetic structure around a structural transition atK, the resulting bifurcation of corner-shared Co-O-Co bond angles causes a weakening of the AFM interaction for one set of bonds along the chains. Consequently, the system undergoes a complex freezing out of relaxation processes on cooling.