准—维反铁磁体CsMnCl_3·2D_2O的拉曼散射谱

RAMAN SPECTRA OF QUASI-ONE-DIMENSIONAL ANTIFERROMAGNET CsMnCl_3·2D_2O

在室温下研究了CsMnCl_3·2D_2O(CMC)的拉曼散射谱。在忽略结晶水的内振动情况下,群论分析得出9A_g+10B_(1g)+11B_(2g)+12B_(3g),共有42支拉曼振动模,观测到这些振动模在实验中的低频部分。在高频部分观测到CMC中结晶重水的内振动模,发现结晶重水与纯D_2O有相似的振动行为,并确定了CMC中结晶重水分子的空间取向。

The Raman scattering spectra of CsMnCl_3·2D_2O (CMC) have been studied at room temperature. The group theory analysis shows that there are 9A_g , 10B_(1g), 11B_(2g), 12B_(3g) Ranam-active modes under approximation of neglecting internal vibration modws of D_2O in CMC. These Raman vibration modes have been measured in lower frequency range. Internal vibration modes of D_2O in the crystal are observed in higher frequency range, which are similar to the vibration modes of pure D_2O. The spatial orientation of the water molecules of crystallization is derived.