论文标题
部分可观测时空混沌系统的无模型预测
Magnetic structure and properties of a vanthoffite mineral Na6Mn(SO4)4
论文作者
论文摘要
报告了对Vanthoffite型矿物NA6MN（SO4）4基磁化，低温中子粉末衍射和理论计算的磁性详细分析。矿物质在单斜系统中与空间群P21/C结晶，其中MNO6八面体通过SO4 Tetrahedra链接。这引起了两个由两个非磁性桥接阴离子介导的两个MN2+离子之间的超级交流相互作用，并导致抗磁性排序以下3 k以下。在1.7 K处的中子粉末衍射衍生出的磁性结构，描绘了1.7 k的中子衍射，描绘了抗铁磁性的抗铁磁性抗铁磁性的抗铁磁性结构。使用精确的对角线化技术通过数值计算来建模磁性，该技术适合实验结果并提供Na6Mn的抗磁基态（SO4）4。
A detailed analysis of the magnetic properties of a vanthoffite type mineral Na6Mn(SO4)4 basedon dc magnetization, low temperature neutron powder diffraction and theoretical calculations is reported. The mineral crystallizes in a monoclinic system with space group P21/c, where MnO6 octahedra are linked via SO4 tetrahedra. This gives rise to super-exchange interaction between two Mn2+ ions mediated by two nonmagnetic bridging anions and leads to an antiferromagnetic ordering below 3 K. The magnetic structure derived from neutron powder diffraction at 1.7 K depicts an antiferromagnetic spin arrangement in the bc plane of the crystal. The magnetic properties are modelled by numerical calculations using exact diagonalization technique, which fits the experimental results and provides antiferromagnetic ground state of Na6Mn(SO4)4.
