Luminescence of defect centers in yttrium–aluminum garnet crystals

Ashurov, M. Kh.; Rakov, A. F.; Erzin, R. A.

doi:10.1016/s0038-1098(01)00434-3

Cited by 26 publications

(8 citation statements)

References 13 publications

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“…This compound exhibits a high melting point (1970°C), high‐temperature creep‐resistance and excellent optical properties . YAG is an important host for laser materials and scintillators . For example, the Nd 3+ ‐doped YAG single crystal fabricated by the Czochralski method has been widely used as a solid‐state laser material .…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Intrinsic Point Defects and Oxygen Diffusion in Yttrium Aluminum Garnet: First‐Principles Investigation

Liu

Wang

et al. 2012

J. Am. Ceram. Soc.

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Formation of intrinsic point defect in yttrium aluminum garnet (YAG) is comprehensively investigated using first‐principles calculations. We showed that the defect formation energies of intrinsic point defects closely depend on the possible values of chemical potentials of Y, Al, and O. Both YAl16(a) anti‐site defect, oxygen vacancy VO, and interstitial Oi might be the preferred defect species when chemical potentials of Y, Al, and O vary in different areas. The O‐related defects are also important intrinsic point defects in YAG and deserve to be further examined. The oxygen self‐diffusion are investigated and we found that energy barrier of oxygen diffusion is enhanced and decreased by neighboring YAl16(a) and AlY anti‐site defects, respectively. The results are used to explain the mechanism of experimental observations that Al2O3 excess speeds up oxygen diffusion and that Y2O3 excess suppresses oxygen diffusion in YAG.

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Section: Introductionmentioning

confidence: 99%

Mechanism of Intrinsic Point Defects and Oxygen Diffusion in Yttrium Aluminum Garnet: First‐Principles Investigation

Liu

Wang

et al. 2012

J. Am. Ceram. Soc.

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“…YAG nanocrystals are also considered as very efficient scintillators for γ -and X-rays (7). YAG may be synthesized by a variety of routes such as solid-state reaction, sol-gel method (7), Stockbarger method (8), precipitation techniques (9) and solution combustion methods (10). Among these techniques, solution combustion method has several advantages since it is simple, fast, requires less energy and produces homogeneous and high purity crystalline oxides with a high surface area.…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence studies of γ-irradiated nanocrystalline Y₃Al₅O₁₂

Shivaramu

Lakshminarasappa

Nagabhushana

et al. 2014

Radiation Effects and Defects in Solids

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Nanocrystalline yttrium aluminum garnet (Y 3 Al 5 O 12 ) is synthesized by combustion technique. The X-ray diffraction (XRD) pattern of 900 • C annealed sample revealed a cubic structure. The average crystallite size is found to be 20.5 nm. γ -irradiated Y 3 Al 5 O 12 exhibits two thermoluminescence (TL) glows: a prominent one with a peak at ∼410 K and another one with a peak at ∼575 K. It is found that the TL glow peak intensity at 410 K increases, while its glow peak temperature is almost steady with an increase in the γ -dose. The effect of the heating rate on the TL glow curve is studied. It is found that T m1 shifts towards higher temperature region while the I m1 decreases with an increase in the heating rate. The TL glow curves are analyzed by Chen's peak shape method and the TL parameters are estimated.

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“…Different studies suggest that luminescence bands of F and F + centers peak at 2.7 and 3.1 eV (Pujats et al, 2001) with related absorption bands at 5.16, 6.3, and 3.35, 5.27 , eV respectively. Ashurov et al (2001) proposed that under neutron irradiation F + centers are created with typical emission at 2.38eV . There are data available from various sources listed above not being in a complete agreement.…”

Section: Introductionmentioning

confidence: 99%

Investigation of luminescence processes in YAG single crystals irradiated by 50 MeV electron beam

Aleksanyan

Kirm

Vielhauer

et al. 2013

Radiation Measurements

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Absorption, emission and excitation spectra of 50 MeV electron beam irradiated and asgrown YAG single crystals were studied and compared in the 10-300 K temperature range using timeresolved luminescence spectroscopy under UV/VUV/XUV excitation by synchrotron radiation and cathodoluminescence. The emission spectra consist of intrinsic (excitonic) and defect related nonelementary bands in the VIS/UV range. It is shown that fast electrons create stable F and F + color centers with characteristic emission and absorption bands in the visible/UV range. Induced absorption caused from these defects starts at 4.2 eV. Energy transfer from host to color centers is not efficient process.

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Luminescence of defect centers in yttrium–aluminum garnet crystals

Cited by 26 publications

References 13 publications

Mechanism of Intrinsic Point Defects and Oxygen Diffusion in Yttrium Aluminum Garnet: First‐Principles Investigation

Mechanism of Intrinsic Point Defects and Oxygen Diffusion in Yttrium Aluminum Garnet: First‐Principles Investigation

Thermoluminescence studies of γ-irradiated nanocrystalline Y₃Al₅O₁₂

Investigation of luminescence processes in YAG single crystals irradiated by 50 MeV electron beam

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Luminescence of defect centers in yttrium–aluminum garnet crystals

Cited by 26 publications

References 13 publications

Mechanism of Intrinsic Point Defects and Oxygen Diffusion in Yttrium Aluminum Garnet: First‐Principles Investigation

Mechanism of Intrinsic Point Defects and Oxygen Diffusion in Yttrium Aluminum Garnet: First‐Principles Investigation

Thermoluminescence studies of γ-irradiated nanocrystalline Y3Al5O12

Investigation of luminescence processes in YAG single crystals irradiated by 50 MeV electron beam

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Thermoluminescence studies of γ-irradiated nanocrystalline Y₃Al₅O₁₂