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Electronic structure and properties of RbTiOPO4:Ta crystals

机译：RBTIOPO4的电子结构和性质：TA晶体

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摘要

RTP crystals doped with four different Ta concentrations were grown by high-temperature solution method. Ta dopants changed the growth habit of RTP and the (100) faces were more developed than the other crystal faces. The chemical composition and electronic structure were analyzed using Electron Probe Microanalysis (EPMA) and X-ray photoelectron spectroscopy (XPS). Ta elements could easily incorporate into RTP crystals from the melt due to the large distribution coefficient. As Ta content increased, the Rb 3d, Ti 2p, P 2p, O 1s XPS spectra showed a shift towards higher binding energy. The relative Ta atomic concentration in RTP: Ta crystals was calculated and it was determined that the molar ratio between Ta and Ti was higher than the nominal ratio. The thermal properties and SHG efficiency were also studied. Ta dopants decreased the transition temperature from the orthorhombic RTP phase to the cubic RTP phase and increased the decomposition temperature of the cubic RTP phase. When the Ta concentration increased to 9 mol%, the specific heat of the doped crystal was 1.5 times that of pure RTP crystal at 300 degrees C and SHG intensity was improved by 59% when compared with pure RTP. The results show that Ta doping is helpful for improvement of SHG efficiency and increasing resistance to laser irradiation.
机译：通过高温溶液法生长掺杂有四种不同TA浓度的RTP晶体。 TA掺杂剂改变了RTP的生长习惯，（100）面比其他水晶面更明显。使用电子探针微分析（EPMA）和X射线光电子能谱（XPS）分析化学成分和电子结构。由于较大的分布系数，Ta元素可以容易地从熔体中纳入RTP晶体中。由于TA含量增加，RB 3D，Ti 2P，P 2P，O 1S XPS光谱显示出朝向更高的绑定能量的转变。计算RTP中的相对Ta原子浓度：计算Ta晶体，确定Ta和Ti之间的摩尔比高于标称比。还研究了热性能和SHG效率。钽掺杂剂的转变温度降低从斜方晶相RTP向立方RTP相并增加了立方相RTP的分解温度。当TA浓度增加至9mol％时，掺杂晶体的比热量为300摄氏度的纯RTP晶体的1.5倍，并且与纯RTP相比，SHG强度提高了59％。结果表明，TA掺杂有助于改善SHG效率和增加对激光照射的抗性。

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  • 来源
    《RSC Advances》 |2017年第84期|共6页
  • 作者

    Li Ziqing; Chen Yang; Zhu Pengfei; Ji Nianjing; Duan Xiulan; Jiang Huaidong;

  • 作者单位

    Shandong Univ Inst Crystal Mat State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

    Shandong Univ Inst Crystal Mat State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

    Shandong Univ Inst Crystal Mat State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

    Shandong Univ Inst Crystal Mat State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

    Shandong Univ Inst Crystal Mat State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

    Shandong Univ Inst Crystal Mat State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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