准—维反铁磁体CsMnCl_3·2H_2O(2D_2O)的电子光谱研究

STUDY OF OPTICAL ABSORPTION SPECTRUM OF QUASI-ONE -DIMENSIONAL ANTIFERROMAGNET CsMnCl_3·2H_2O (2D_2O)

在室温下研究了CsMnCl_3·2H_2O(2D_2O)(CMC)的吸收光谱。在250～650nm波长范围内观察到7个明显的吸收峰。根据CMC晶体的实际结构,对CMC晶体巾Mn^(2+)离子所处的对称晶场采用O_h近似,利用配位场理论计算出了Mn^(2+)离子的电子能级,并确认了能级跃迁与各吸收峰的对应关系。理论计算与实验结果较符合。

The optical absorption spectrum of CsMnCl_3·2H_2O (2D_2O) (CMC) is studied at room temperature. The seven principal bands are observed in the range of 250～650nm. Considering octahedral ligand field O_h point group symmetry of Mn^(2+) ion in CMC crystal and using ligand field theory, we have calculated the electronic spectrum of Mn^(2+) ion in CMC crystal. The theoretical values are in good agreement with experimental.