YAl3(BO3)4:Pr3+中Pr3+离子的高分辨率光谱学。晶场、超精细和电子变形相互作用
High-resolution spectroscopy of Pr3+ions in YAl3(BO3)4:Pr3+. Crystal-field, hyperfine,and electron-deformation interactions
AI总结：
研究了YAl3(BO3)4:Pr3+中Pr3+离子的高分辨率光谱特性，通过晶场、超精细和电子变形相互作用分析晶场参数及随机应变来源。
摘要：
对掺杂有Pr3+离子（浓度为1和2.5 at. %）的YAl3(BO3)4晶体的光学透射光谱进行了研究，采用高分辨率（最高0.05 cm-1）傅里叶光谱技术，包括在磁场平行于晶体三棱柱c轴的情况下。确定了Pr3+的几个晶场双重态的g因子。使用交换电荷模型和高分辨率光谱数据进行的晶场计算，使我们获得了物理上合理的晶场参数集。在零磁场下，某些双重态的分裂是由随机晶格变形的存在所解释的。对观察到的变形双重态轮廓进行了模拟，考虑了超精细和电子变形相互作用。估计了随机应变分布函数的宽度。讨论了YAl3(BO3)4:Pr3+晶体中随机应变的主要来源。
英文摘要：
Optical transmission spectra of YAl3(BO3)4 crystals doped with the Pr3+ ions in concentrations 1 and 2.5 at. % were studied by high-resolution (up to 0.05 cm-1) Fourier spectroscopy, including in magnetic field parallel to the trigonal c axis of the crystal. The g factors of several crystal-field doublets of Pr3+ were determined. The crystal-field calculations performed using the exchange-charge model and high-resolution spectroscopy data allowed us to obtain a physically reasonable set of crystal-field parameters. The observed splitting of a number of doublets in zero magnetic field is explained by the presence of random lattice deformations. Simulation of the profiles of observed deformational doublets was carried out taking into account both hyperfine and electron-deformation interactions. The width of the distribution function of random strains was estimated. The main sources of random strains in YAl3(BO3)4:Pr3+ crystals are discussed.
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