Scholarlink

<p>The multifaceted radiation effects occurring in advanced optical material – the crystals of yttrium aluminum garnet Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>, irradiated by swift heavy 230&#xa0;MeV Xe ions to fluences of 6 × 10<sup>10</sup>-10<sup>13</sup> ions/cm<sup>2</sup> have been investigated using various research techniques, including optical absorption, Raman spectroscopy, photoluminescence under excitation by the synchrotron radiation, nanohardness measurements, and high-resolution transmission electron microscopy. The near-surface layer at high fluence becomes amorphous, and material softening indicates destruction of cation-anion bonds due to tracks overlapping. Transmission electron microscopy analysis confirmed the presence of continuous tracks in irradiated Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> crystals at energy losses above 10&#xa0;keV/nm, whereas lower-energy tracks appear as chains of smaller defects. The core track diameter is d<sub>c</sub> <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:\approx\:\)</EquationSource> </InlineEquation>(5.00 <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:\pm\:\)</EquationSource> </InlineEquation> 0.15) nm, with a surrounding damaged region of d<sub>d</sub><InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\:\approx\:\)</EquationSource> </InlineEquation> (10.00 <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\:\pm\:\)</EquationSource> </InlineEquation> 0.15) nm. An increase in the concentration of oxygen vacancies (F and F<sup>+</sup> centers) and Y<sub>Al</sub> antisite defects with increasing irradiation fluence is confirmed through photoluminescence spectra of initial and irradiated crystals at 9&#xa0;K. In addition, Y<sub>Al</sub>–F⁺ and/or Y<sub>Al</sub>–F dimers may form based on antisite defects associated with F-like centers, as a result of melting and crystalization processes occurring during track formation under Xe ion irradiation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structural and optical properties of Y3Al5O12 single crystals irradiated by swift heavy Xe ions

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月27日

查看全文
  • Alma Dauletbekova,
  • Zhadiger Dosmagambetov,
  • Ilze Manika,
  • Reinis Ignatans,
  • Krisjanis Smits,
  • Artur Majewski-Napierkowski,
  • Yuriy Zorenko,
  • Abdirash Akilbekov,
  • Ruslan Assylbayev,
  • Anatoli I. Popov,
  • Zhakyp Karipbayev,
  • Gulnara Aralbayeva

摘要

The multifaceted radiation effects occurring in advanced optical material – the crystals of yttrium aluminum garnet Y3Al5O12, irradiated by swift heavy 230 MeV Xe ions to fluences of 6 × 1010-1013 ions/cm2 have been investigated using various research techniques, including optical absorption, Raman spectroscopy, photoluminescence under excitation by the synchrotron radiation, nanohardness measurements, and high-resolution transmission electron microscopy. The near-surface layer at high fluence becomes amorphous, and material softening indicates destruction of cation-anion bonds due to tracks overlapping. Transmission electron microscopy analysis confirmed the presence of continuous tracks in irradiated Y3Al5O12 crystals at energy losses above 10 keV/nm, whereas lower-energy tracks appear as chains of smaller defects. The core track diameter is dc \(\:\approx\:\) (5.00 \(\:\pm\:\) 0.15) nm, with a surrounding damaged region of dd \(\:\approx\:\) (10.00 \(\:\pm\:\) 0.15) nm. An increase in the concentration of oxygen vacancies (F and F+ centers) and YAl antisite defects with increasing irradiation fluence is confirmed through photoluminescence spectra of initial and irradiated crystals at 9 K. In addition, YAl–F⁺ and/or YAl–F dimers may form based on antisite defects associated with F-like centers, as a result of melting and crystalization processes occurring during track formation under Xe ion irradiation.