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<p>Doping-induced structural changes and spectroscopic parameters of Czochralski-grown <i>RE</i><sup>3+</sup>-activated strontium molybdate SrMoO<sub>4</sub> (SMO:<i>RE</i>; <i>RE</i><sup>3+</sup>  = Pr, Nd, Eu, Yb) single crystals as well as specific local behavior of <i>RE</i><sup>3+</sup> ions depending on the type, concentration (0.2–3.0 wt. %) and the method of introducing the dopant (<i>RE</i>NbO<sub>4</sub> with <i>RE</i> = Pr, Nd, Eu, Yb or Yb<sub>2</sub>O<sub>3</sub>) are described in this paper. X-ray single-crystal diffraction analysis of macro- (laboratory diffractometer) and microparts (synchrotron) of SMO:<i>RE</i> crystals showed a difference between the initial and actual compositions and refined compositions of macro- and microparts due to growth, physical–chemical and methodological reasons. A complex characterization of defect formation including all types of point defects (vacancies, interstitials, substitutional atoms, etc.) and charge compensation mechanisms in SMO:<i>RE</i> crystals depending on the <i>RE</i> composition and concentration is performed. Formal charges, coordination numbers and coordination polyhedra of <i>RE</i>, Mo, Nb in SMO:<i>RE</i> are found using X-ray absorption spectroscopy (EXAFS/XANES) and electron paramagnetic resonance. The structural and structure-dependent spectroscopic and laser characteristics of polycrystalline and single-crystal SMO:<i>RE</i>, obtained by different methods, with different type (<i>RE</i> = La – Lu) and concentrations of <i>RE</i><sup>3+</sup> ions are summarized and analyzed based on our own and literary data.</p>

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Effect of type and concentration of RE3+ (RE = Pr, Nd, Eu, Yb) on structure, actual crystal and local compositions and spectroscopic properties of SrMoO4:RE3+ single crystals for optoelectronics

  • 期刊论文

  • 发表日期：

    2025年8月17日

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  • Galina M. Kuz’micheva,
  • Irina A. Kaurova,
  • Liudmila I. Ivleva,
  • Vladimir A. Lazarenko,
  • Evgeny V. Khramov,
  • Alexander V. Fionov

摘要

Doping-induced structural changes and spectroscopic parameters of Czochralski-grown RE3+-activated strontium molybdate SrMoO4 (SMO:RE; RE3+  = Pr, Nd, Eu, Yb) single crystals as well as specific local behavior of RE3+ ions depending on the type, concentration (0.2–3.0 wt. %) and the method of introducing the dopant (RENbO4 with RE = Pr, Nd, Eu, Yb or Yb2O3) are described in this paper. X-ray single-crystal diffraction analysis of macro- (laboratory diffractometer) and microparts (synchrotron) of SMO:RE crystals showed a difference between the initial and actual compositions and refined compositions of macro- and microparts due to growth, physical–chemical and methodological reasons. A complex characterization of defect formation including all types of point defects (vacancies, interstitials, substitutional atoms, etc.) and charge compensation mechanisms in SMO:RE crystals depending on the RE composition and concentration is performed. Formal charges, coordination numbers and coordination polyhedra of RE, Mo, Nb in SMO:RE are found using X-ray absorption spectroscopy (EXAFS/XANES) and electron paramagnetic resonance. The structural and structure-dependent spectroscopic and laser characteristics of polycrystalline and single-crystal SMO:RE, obtained by different methods, with different type (RE = La – Lu) and concentrations of RE3+ ions are summarized and analyzed based on our own and literary data.