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Journal of Materials Science

, Volume 43, Issue 2, pp 464–468 | Cite as

Luminescence of SrAl2O4:Cr3+

  • Ada López
  • Mariana G. da Silva
  • Elisa Baggio-Saitovitch
  • Alexandre R. Camara
  • Raimundo N. SilveiraJr.
  • Raul José Mauricio da Fonseca
Article

Abstract

Samples of SrAl2O4 and SrAl2O4:Cr3+ were prepared by mixing the powder materials SrCO3, Al2O3, and Cr2O3. The crystal structures of the undoped and doped samples were analyzed by X-ray diffraction (XRD) measurements. The diffraction patterns reveal a dominant phase, characteristic of the monoclinic SrAl2O4 compound and another unknown secondary phase, in small amount, for doped samples. The data were fitted using the Rietveld method for structural refinements and lattice parameter constants (a, b, c, and β) were determined. Luminescence of Cr3+ ions in this host is investigated for the first time by excitation and emission spectroscopy at room temperature. Emission spectra present a larger band and a smaller structure associated to the \( ^{{\text{4}}} T_{{\text{2}}} {\text{ (}}^{{\text{4}}} F{\text{)}} \to ^{{\text{4}}} A_{{\text{2}}} {\text{ (}}^{{\text{4}}} F{\text{)}} \) and \( ^{{\text{2}}} E{\text{ (}}^{{\text{2}}} G{\text{)}} \to ^{{\text{4}}} A_{{\text{2}}} {\text{ (}}^{{\text{4}}} F{\text{)}} \) electronic transitions, respectively. The obtained results are analyzed by crystal-field theory and the crystal-field parameter, Dq, and Racah parameters, B and C, are determined from the excitation measurements.

Keywords

Octahedral Coordination Excitation Band SrAl2O4 Racah Parameter Persistent Luminescence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The work described here was financially supported by the research national agencies FINEP and CNPq and by FAPERJ, the Rio de Janeiro State research agency.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Ada López
    • 1
    • 2
  • Mariana G. da Silva
    • 1
    • 2
  • Elisa Baggio-Saitovitch
    • 1
  • Alexandre R. Camara
    • 2
  • Raimundo N. SilveiraJr.
    • 2
  • Raul José Mauricio da Fonseca
    • 2
  1. 1.Centro Brasileiro de Pesquisas FísicasRio de JaneiroBrazil
  2. 2.DEQ, Instituto de FísicaUniversidade do Estado do Rio de JaneiroRio de JaneiroBrazil

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