Crystallization Region, Crystal Growth, and Characterization of Rubidium Titanyl Phosphate Codoped with Niobium and Lanthanide Ions
Crystallization Region, Crystal Growth, and Characterization of Rubidium Titanyl Phosphate Codoped with Niobium and Lanthanide Ions
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铌、镧系离子共掺杂钛氧基磷酸铷的结晶区域、晶体生长及表征
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发表时间：
2002
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通讯作者：
F. Díaz
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作者：
J. Carvajal;V. Nikolov;R. Solé;J. Gavaldà;J. Massons;M. Aguiló;F. Díaz
以Rb2O - P2O5 - TiO2的摩尔比范围为基础，研究了Nb和Ln （Ln = Er3+或Yb3+）共掺杂RbTiOPO4 （RTP）的结晶区域。用TiO2取代Nb2O5和Ln2O3后，Nb2O5和Ln2O3的临界浓度有显著差异。这些差异取决于每种情况下使用的Rb2O - P2O5 - TiO2的初始摩尔比。两种镧系元素的临界浓度也不同；Yb2O3的临界浓度均低于Er2O3的临界浓度。与溶液中相似浓度相比，Yb3+晶体中Ln的分布系数和浓度均高于Er3+。RTP:（Nb,Er）和RTP:（Nb,Yb）的单晶生长具有光学质量，并且这些单晶足够大，可以进行光谱表征。
We studied the crystallization region of RbTiOPO4 (RTP) codoped with Nb and Ln (Ln = Er3+ or Yb3+), taking as basis a range of molar ratios of Rb2O−P2O5−TiO2. Significant differences in the critical concentration of Nb2O5 and Ln2O3 when we substituted TiO2 with these oxides where observed. These differences depended on the initial molar ratio of Rb2O−P2O5−TiO2 used in each case. The critical concentrations of the two lanthanides were also different; the critical concentration of Yb2O3 was lower than that of Er2O3 for all compositions. The distribution coefficients and concentration of Ln in the crystals were higher for Yb3+ than for Er3+, comparing similar concentrations in the solution. Single crystals of RTP:(Nb,Er) and RTP:(Nb,Yb) were grown with optical quality, and these were large enough to make spectroscopic characterizations.