Effect of hydrostatic pressure on the free-ion parameters and the crystal-field strength for YOCl: Eu~(3+)

Chi Yuanbin; Liu Shenxin; Pan Yuewu

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Effect of hydrostatic pressure on the free-ion parameters and the crystal-field strength for YOCl: Eu~(3+)

机译：静水压力对YOCl：Eu〜（3+）的自由离子参数和晶场强度的影响

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The fluorescence spectra of Eu~(3+) in YCCl:Eu~(3+) were measured under pressure up to 10.3 GPa at room temperature. The pressure dependence of the crystal-field levels of the ~7F_(0-4) and ~5D_(0-2) multiplets for the Eu~(3+) ion was determined from the spectra. From the mutations of the experimental data, the free-ion parameters F_2 and #zeta#, the crystal-field parameters B_q~k and the crystal-field strength parameter S_t were obtained at various pressures. The result of the simulation shows that the crystal-field strength increases with pressurization which is contrary to the results of its isomorphic compounds, e.g. LaOCl and LaOBr doped with Eu~(3+). The electrostatic repulsion and the spin-orbit coupling interactions of 4f electrons decrease with increasing pressure. The central-field covalency uchasism and the symmetry-restricted covalency mechanism play a leading role in the relative reductions of #zeta# and F_2, respectively.

机译：在室温下在高达10.3 GPa的压力下测量了YCCl：Eu〜（3+）中Eu〜（3+）的荧光光谱。从光谱中确定了Eu〜（3+）离子的〜7F_（0-4）和〜5D_（0-2）多重峰的晶体场能级与压力的关系。从实验数据的突变，获得了在不同压力下的自由离子参数F_2和＃zeta＃，晶体场参数B_q〜k和晶体场强度参数S_t。模拟的结果表明，晶体场强度随加压而增加，这与它的同构化合物例如晶体的结果相反。 LaOCl和LaOBr掺杂Eu〜（3+）。 4f电子的静电排斥和自旋轨道耦合相互作用随着压力的增加而降低。中心场共价性和对称限制价性机制分别在＃zeta＃和F_2的相对减少中起主导作用。

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《Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics》 |2001年第2期|共7页
作者
Chi Yuanbin; Liu Shenxin; Pan Yuewu;
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正文语种 eng
中图分类合金学与各种性质合金;金属材料;
关键词
optical materials; crystal fields; optical properties;

机译：光学材料;晶体场;光学性质;

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1. Effect of hydrostatic pressure on the free-ion parameters and the crystal-field strength for YOCl: Eu~(3+) [J] . Chi Yuanbin, Liu Shenxin, Pan Yuewu Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics . 2001,第1a2期

机译：静水压力对YOCl：Eu〜（3+）的自由离子参数和晶场强度的影响
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8. Theoretical Free-Ion Energies,Derivatives and Reduced Matrix Elements I. Pr(3+),Tm(3+),Nd(3+),and Er(3+). [R] . morrison,clyde a. karayianis,nick 1977

机译：理论自由离子能量，衍生物和还原的基质元素I. pr（3 +），Tm（3 +），Nd（3 +）和Er（3+）。

Effect of hydrostatic pressure on the free-ion parameters and the crystal-field strength for YOCl: Eu~(3+)

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