论文标题
Er $^{3+} $和yb $^{3+} $ ions in y $ _ {2} $ _ {2} $ _ {2} $ _ {2} $ o $ _ {7} $ crystals的光谱和磁性属性
The Spectral and Magnetic Properties of Er$^{3+}$ and Yb$^{3+}$ Ions in Y$_{2}$Ti$_{2}$O$_{7}$ Crystals with a Pyrochlore Structure
论文作者
论文摘要
立方y $ _ {2} $ ti $ _ {2} $ o $ $ _ {7} $单晶掺杂了ER $^{3+} $和Yb $^{3+} $ ions of Electron Spin Resonance（ESR）和选择性激光镜的方法。 ESR光谱显示来自稀土离子的信号，这些信号代替了局部三角对称位点的YTTRIUM离子。确定了$ g $张量的组件。光学研究的结果表明，形成了几种类型的杂质中心。发现这些中心的地面和激发多重的能量。在各种检测到的光学中心中，在ESR光谱形成中占主导地位的中心是歧视的。使用Exchange-Charge模型对实验数据的分析使确定ER $^{3+} $和Yb $^{3+} $ ions替换y $^{3+} $ ions in pyrochlore的pyrochlore中的y $^{3+} $ ions的晶体场的参数集成为可能y $ _ {2} $ ti $ _ {2} $ o $ _ {7} $。
Cubic Y$_{2}$Ti$_{2}$O$_{7}$ single crystals doped with Er$^{3+}$ and Yb$^{3+}$ ions have been studied by the methods of electron spin resonance (ESR) and selective laser spectroscopy. ESR spectra exhibit signals from rare-earth ions that substitute for yttrium ions in sites with local trigonal symmetry. The $g$ tensor components are determined. The results of optical investigations indicate that impurity centers of several types are formed; the sublevel energies of the ground and excited multiplets of these centers are found. Among the great variety of detected optical centers, the centers that dominate in the formation of ESR spectra are discriminated. An analysis of the experimental data using the exchange-charge model have made it possible to determine the sets of parameters of the crystal field for Er$^{3+}$ and Yb$^{3+}$ ions substituting Y$^{3+}$ ions in regular crystallographic sites in pyrochlore Y$_{2}$Ti$_{2}$O$_{7}$.
