| 基质发光晶体Na5Eu(MoO4)4在高压下的光谱与晶体场参数 |
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| 引用本文： | 郭常新,李碧琳.基质发光晶体Na5Eu(MoO4)4在高压下的光谱与晶体场参数[J].物理学报,1993,42(1):101-105. |
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| 作者姓名： | 郭常新 李碧琳 |
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| 作者单位： | 中国科学技术大学物理系,合肥230026 |
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| 摘 要： | 对白钨矿型化学计量的基质发光晶体四钼酸铕钠Na5Eu(MoO4)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Eu3+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YVO4:Eu的高压光谱结果作了对比。
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| 关 键 词： | 发光材料 钼酸盐 光谱 高压 |
| 收稿时间： | 1992-01-21 |
SPECTRA AND CRYSTAL PARAMETERS OF HOST LUMINESCENT CRYSTAL Na5Eu(MoO4)4 UNDER HIGH PRESSURE |
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| GUO CHANG-XIN and LI BI-LIN.SPECTRA AND CRYSTAL PARAMETERS OF HOST LUMINESCENT CRYSTAL Na5Eu(MoO4)4 UNDER HIGH PRESSURE[J].Acta Physica Sinica,1993,42(1):101-105. |
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| Authors: | GUO CHANG-XIN and LI BI-LIN |
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| Abstract: | 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. |
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