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<p>Four double doped LiNbO<sub>3</sub>:Zn: B crystals has been grown from a melt containing ~ 1.5&#xa0;mol% B and ~ 5.24–7.40&#xa0;mol% ZnO by the Czochralski. The concentration dependences of the physico-chemical characteristics of LiNbO<sub>3</sub>:Zn: B did not show any “threshold” effects during crystal growth. These effects are observed in single doped LiNbO<sub>3</sub>:Zn crystals in the concentration range of ~ 6.8&#xa0;mol% ZnO in the melt. Weak anomalies have been detected on the concentration dependences of the content of OH groups and quantitative characteristics of microstructure in LiNbO<sub>3</sub>:Zn: B crystals in this region of ZnO concentrations in the melt. The amount of zinc incorporated in LiNbO<sub>3</sub>:Zn: B crystals was ~ 22–28% less than incorporated in LiNbO<sub>3</sub>:Zn crystals with a similar zinc content in the melt. This is caused by a change in the structure of the melt in the presence of a strong complexing agent boron. The macro- and microdefect structure of LiNbO<sub>3</sub>:Zn: B crystals has been studied in detail by optical microscopy and compared with that of LiNbO<sub>3</sub>:Zn and LiNbO<sub>3</sub>:B crystals. It has been established that in LiNbO<sub>3</sub>:Zn: B crystals, in contrast to LiNbO<sub>3</sub>:Zn crystals, the second phases do not segregate at high concentrations of zinc in the melt.</p>

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Preparation and features of defective structure and optical properties of LiNbO3:Zn: B crystals

  • 期刊论文

  • 发表日期：

    2025年8月20日

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  • Mikhail N. Palatnikov,
  • Irina V. Biryukova,
  • Roman A. Titov,
  • Natalya A. Teplyakova,
  • Lubov A. Bobreva,
  • Ilija N. Efremov,
  • Olga V. Palatnikova,
  • Nikolay V. Sidorov

摘要

Four double doped LiNbO3:Zn: B crystals has been grown from a melt containing ~ 1.5 mol% B and ~ 5.24–7.40 mol% ZnO by the Czochralski. The concentration dependences of the physico-chemical characteristics of LiNbO3:Zn: B did not show any “threshold” effects during crystal growth. These effects are observed in single doped LiNbO3:Zn crystals in the concentration range of ~ 6.8 mol% ZnO in the melt. Weak anomalies have been detected on the concentration dependences of the content of OH groups and quantitative characteristics of microstructure in LiNbO3:Zn: B crystals in this region of ZnO concentrations in the melt. The amount of zinc incorporated in LiNbO3:Zn: B crystals was ~ 22–28% less than incorporated in LiNbO3:Zn crystals with a similar zinc content in the melt. This is caused by a change in the structure of the melt in the presence of a strong complexing agent boron. The macro- and microdefect structure of LiNbO3:Zn: B crystals has been studied in detail by optical microscopy and compared with that of LiNbO3:Zn and LiNbO3:B crystals. It has been established that in LiNbO3:Zn: B crystals, in contrast to LiNbO3:Zn crystals, the second phases do not segregate at high concentrations of zinc in the melt.