基质发光晶体Na_5Eu(MoO_4)_4在高压下的光谱与晶体场参数  

SPECTRA AND CRYSTAL PARAMETERS OF HOST LUMINESCENT CRYSTAL Na,Eu(MoO_4)_4 UNDER HIGH PRESSURE

作　　者：郭常新[1] 李碧琳[2] 

机构地区：[1]中国科学技术大学物理系,合肥230026 [2]中国科学技术大学结构分析开放研究实验室,合肥230026

出　　处：《物理学报》1993年第1期101-105,共5页Acta Physica Sinica

摘　　要：对白钨矿型化学计量的基质发光晶体四钼酸铕钠Na_5Eu(MoO_4)_4在室温下的高压光谱用金刚石对顶砧高压显微光谱系统进行了研究。确定了Eu^(3+)各发射谱线的压力红移率。按晶场理论简化方法推导了能级的晶场参数表达式,并按实验数据拟会出晶场参数随压力的移动率。还将上述结果与掺杂发光材料YVO_4:Eu的高压光谱结果作了对比。Na5Eu(MoO4)4 is a stoichiometrlc host luminescent material. The light emessioB comes from high concentration host ions Eu3+. In the present work, the effects of hydropressure on fluorescence of Eu3+ in Na5Eu(MoO4)4 are invistigated under 0+ 5.0 GPa using a diamon anvil high pressure microspectroscopic system. According to crystal field theory, the energy level fexpressinns of Eu3+ (in approximatry D2d symmetry site) are calculated and fit with the experimental data of energy levels, under high pressure, then the ratios of crystal parameter variation △Bkq (kq= 20,40 44, 60 and 64) with pressure variation △P are determind. A comparison of above results with that of YVO4:Eu3+, in which Eu3+ is an active impurity, is also made.

关 键 词：发光材料 钼酸盐 光谱 高压 

分 类 号：O734.3[理学—晶体学]