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2018 | 133 | 4 | 959-964

Article title

Investigation of Co Ions Diffusion in Gd₃Ga₅O₁₂ Single Crystals

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EN

Abstracts

EN
Spatial changes of properties of Gd₃Ga₅O₁₂ (GGG) single crystals caused by diffusion of cobalt ions during high-temperature annealing (1200°C, 24 h) in Co₃O₄ powder are investigated. The registration of these changes was carried out by optical spectrophotometry, microscopy and micro-Raman scattering methods. Changes in structure of near-surface layers of the crystal were investigated by X-ray diffraction technique. It was shown that the additional absorption induced by annealing is related to intra-center optical transitions in Co²⁺ ions, which occupy tetrahedral positions in the garnet structure at the distances of 250-500 μm from the crystal surface. The dependence of induced absorption with depth has got a non-monotonous character with a maximum at 400 μm. A comparison of the results obtained by different methods allows to suppose that the thermal treatment of GGG in the presence of cobalt ions leads to formation of the structurally and chemically non-uniform layer with a width about 500 μm.

Keywords

EN

Contributors

author
  • Lviv Polytechnic National University, Lviv, Ukraine
  • Scientific Research Company "Electron-Carat", Lviv, Ukraine
author
  • Lviv Polytechnic National University, Lviv, Ukraine
  • Scientific Research Company "Electron-Carat", Lviv, Ukraine
author
  • Lviv Polytechnic National University, Lviv, Ukraine
author
  • Lviv Polytechnic National University, Lviv, Ukraine
author
  • Lviv Polytechnic National University, Lviv, Ukraine
  • Scientific Research Company "Electron-Carat", Lviv, Ukraine
author
  • Lviv Polytechnic National University, Lviv, Ukraine
  • Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
  • Lviv Polytechnic National University, Lviv, Ukraine
  • Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
  • Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
author
  • Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
author
  • Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
  • Institute of Physics, Kazimierz Wielki University, Bydgoszcz, Poland

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.bwnjournal-article-appv133n4p46kz
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