MnHg(SCN)_4与ZnCd(SCN)_4晶体的晶格振动及热导率的拉曼光谱研究  

Raman Spectroscopy Study on Lattice Vibration and Thermal Conductivity of MnHg(SCN)_4 and ZnCd(SCN)_4 Crystals

作　　者：杨云[1] 孙为[1] 张鹏[1] 卢贵武[1] 

机构地区：[1]中国石油大学(北京)理学院,北京102249

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2013年第4期409-412,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：教育部科学技术研究重点项目(108023);中国石油大学(北京)基础学科研究项目(01JB0169)

摘　　要：采用拉曼光谱技术研究了金属有机配合物晶体MnHg(SCN)4(MMTC)和ZnCd(SCN)4(ZCTC)的晶格振动模式.结果表明,MMTC有4类晶格振动模式:SHgS弯曲振动、NMnN弯曲振动、CS弯曲振动和CN伸缩振动;ZCTC有4类晶格振动模式:双重简并CdS4弯曲振动、双重简并ZnN4弯曲振动、SCN弯曲振动和CN伸缩振动.根据晶格动力学理论,推导了晶体热导率及拉曼峰半高宽的关系,计算了上述两种晶体的热导率,讨论了该类晶体激光损伤的物理机制.Raman spectroscopy has been used to investigate the lattice vibrational modes of two types of metal organic complex crystals,MMTC(MnHg(SCN)4) and ZCTC(ZnCd(SCN)4).The experimental results show that MMTC crystal has four characteristic modes:SHgS bending,NMnN bending,CS bending and CN stretching,and ZCTC crystal has four characteristic modes:two doubly degenerate CdS4 bending,two doubly degenerate ZnN4 bending,SCN bending and CN stretching.Based on lattice dynamics theory,we have deduced the relationship between the thermal conductivity and the full width at half maximum of Raman peak.The thermal conductivities of these two crystals have been calculated,and the laser damage physical mechanism has been discussed as well.

关 键 词：金属有机配合物晶体 晶格振动 热导率 拉曼光谱 

分 类 号：O731[理学—晶体学]