Color centers in YAP:Pr crystals

P. Potera 4A. Matkovskii 2,4Ya. Zhydachevskii 2Larisa Grigorjeva 1Donats Millers 1T. Lukasiewicz 3Zbigniew Galazka 3

1. Institute of Solid State Physics, University of Latvia, 8 Kengaraga, Riga LV-1063, Latvia
2. Lviv Polytechnic National University, 12 Bandera, Lviv 79013, Ukraine
3. Institute of Electronic Materials Technology (ITME), Wólczyńska 133, Warszawa 01-919, Poland
4. University of Rzeszow, Institute of Physics, Rejtana 16, Rzeszów 35-310, Poland

Abstract

YAlO3 (YAP) single crystals doped with praseodymium ions are of interest as perspective materials for solid-state lasers.
In the present work we show results of investigation of both transient and stable optical absorption induced in YAP:Pr crystals by ionizing radiation. The transient changes of absorption and relaxation kinetics were measured after excitation of the crystals with the pulsed electron beam (E~0.25 MeV, pulse duration - 10 ns) at room temperature. The stable changes of absorption were measured after gamma-irradiation of the crystals up to 106 Gy absorbed dose and high temperature treatments in reducing and oxidizing atmosphere.
The gamma-irradiation of YAP:Pr leads to the crystal coloration (absorption maxima near 40000, 33000, 25000 and 20000 cm-1 ) caused by recharging of intrinsic point defects of the host.
The transient changes of absorption measured just after electron beam pulse reveal the absorption maxima near 25000, 20000 and 13000 cm-1. The centers responsible for the absorption bands at 25000 cm-1 and 20000 cm-1 decay after electron beam pulse, while part of them remain as stable ones. The centers responsible for the band near 13000 cm-1 are unstable at room temperature.
The results obtained for YAP:Pr crystals are compared with the corresponding ones for pure YAP and YAP:Ca,Pr crystals as well as results obtained previously for YAP:Nd crystals (see [1]). The origin of color centers induced in the crystals is disscussed.
[1] D. Sugak et al., Phys. Stat. Sol. (a) 184 (2001) 239.

Related papers
  1. Comparison of RE ion luminescence in zirconia nanocrystals and Single crystals
  2. Synthesis Of Multi Trace Element Doped Fe0.6Mn0.4Ta2O6 Tantalite Reference Crystals By Czochralski Method
  3. Growth and properties of bulk single crystals of selected transparent semiconducting oxides (TSOs): β-Ga2O3, In2O3 and SnO2
  4. Influence of heat treatment on luminescence of ZrO+ Eu nanopowders
  5. Optyczny sensor tlenu na bazie nanokrystalicznego ZrO2
  6. Nanostructural characterization and magnetic properties of pure and Fe, Co or Mn-doped TiO2 nanopowders prepared by Solar Physical Vapor Deposition (SPVD)
  7. Advanced nanoporous yttria-stabilized zirconia ceramics for luminescent oxygen sensors
  8. Excitation transfer in zirconia nanocrystals and ceramics
  9. Eu Luminescence in zirconia nanocrystals
  10. ZnO ceramic sintering and luminescence properties
  11. Fast luminescence in ZnO structures
  12. Oxygen defects related luminescence of ZrO2 nanocrystals
  13. Luminescence properties of cerium doped Y3Al5O12 nanopowders and nanoceramic
  14. Advanced nanostructural zirconia ceramics for optical oxygen sensors
  15. Study of undoped and doped zirconia nanocrystals luminescence
  16. Zirconia-based nanomaterials for oxygen sensor - generation, characterisation and optical properties
  17. Time-Resolved Luminescence Characteristics of Doped YAG and YAP Nanopowders
  18. The luminescence properties of ZnO:Al nanopowders obtained by sol-gel and vaporization-condensation methods
  19. Cathodoluminescence of Al doped ZnO nanopowders
  20. Luminescence of Europium doped ZrO2 nanopowder
  21. Preliminary research on zirconia based optical oxygen sensor
  22. Time-resolved luminescence of nanostructured ZnO
  23. Yttria stabilized zirconia nanocrystals luminescence
  24. Synthesis of Al-doped ZnO nanomaterials with controlled luminescence properties
  25. Influence of synthesis conditions on the particles size and the morphology of zinc oxide nanopowders
  26. Luminescence of ZrO2 nanocrystals
  27. Molecular impurities in the luminescent ZnO nanocrystals
  28. HYDROTHERMAL SYNTHESIS OF NANOSTRUCTURED ZIRCONIA MATERIALS: PRESENT STATE AND FUTURE PROSPECTS
  29. Luminescence of ZrO2 and ZnO nanocrystals
  30. Luminescence mechanisms: from single crystals to nanocrystals
  31. Thermal expansion of NdGaO3 perovskite
  32. Crystal structure and thermal expansion of PrGaO3 in the temperature range 10-1253 K
  33. Growth and Radiation Induced Color Centers in Oxide Laser Crystals
  34. Thermoluminescence of doped YAlO3 crystals
  35. Twin structure of LSGMO crystals studied by Laue method
  36. Luminescense of Nanosize ZrO2

Presentation: poster at E-MRS Fall Meeting 2003, Symposium A, by Piotr Potera
See On-line Journal of E-MRS Fall Meeting 2003

Submitted: 2003-05-08 09:17
Revised:   2009-06-08 12:55
Google
 
Web science24.com
© 1998-2018 pielaszek research, all rights reserved Powered by the Conference Engine