论文标题
pyrochlores中xy型稀有离子y $ _2 $ _2 $ ti $ _2 $ o $ $ _7 $：re $^{3+} $（re = yb，er）
EPR spectra and magnetization of XY-type rare-earth ions in pyrochlores Y$_2$Ti$_2$O$_7$:RE$^{3+}$ (RE=Yb, Er)
论文作者
论文摘要
y $ _ {2} $ ti $ _2 $ o $ _2 $ _7 $的研究结果通过电子pramagnetic Resonance（EPR）和DC-MAGNETRY掺杂了ER $^{3+} $和Yb $^{3+} $ ions的结果。观察到了具有ER $^{3+} $或Yb $^{3+} $离子的特征性超细结构的三角中心的EPR信号。测量了沿晶体学轴的磁场的磁化磁化的场依赖性和磁敏感性的温度依赖性。从实验数据的分析中获得了ER $^{3+} $和Yb $^{3+} $ ions的旋转Hamiltonian参数（$ G $ - $ $ - $ - $ - $ - 因素和参数）。注册的EPR光谱和磁化曲线通过模拟在晶体场进近的框架中成功地复制，尤其是在yb $^{3+} $ ions的yb $^{13} $配置的杂交中，并具有带电转移状态。
The results of studies of Y$_{2}$Ti$_2$O$_7$ single crystals doped with Er$^{3+}$ and Yb$^{3+}$ ions by means of electron paramagnetic resonance (EPR) and dc-magnetometry are reported. EPR signals of the trigonal centers with the characteristic hyperfine structure of Er$^{3+}$ or Yb$^{3+}$ ions were observed. Field dependences of magnetization of single crystals for magnetic fields directed along the crystallographic axes and temperature dependences of magnetic susceptibilities were measured. Spin Hamiltonian parameters ($g$-factors and parameters of the hyperfine interaction) for Er$^{3+}$ and Yb$^{3+}$ ions were obtained from analysis of experimental data. The registered EPR spectra and magnetization curves were successfully reproduced by simulations in framework of the crystal-field approach, in particular, with an account for hybridization of ground 4f$^{13}$ configuration of Yb$^{3+}$ ions with the charge transfer states.
