EPR of Eu2+ in BaBr2 crystals and fluorobromozirconate glass ceramics

S. Schweizer, G. Corradi, A. Edgar, J. M. Spaeth

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The x-ray storage phosphor properties of fluorozirconate glasses doped with Eu2+ and Br- were interpreted previously to be due to BaBr2:Eu2+ crystalline precipitates. In order to compare their behaviour with BaBr2:Eu2+ single crystals, we grew such single crystals and investigated them with electron paramagnetic resonance (EPR). The Eu2+ EPR spectra show local CS symmetry, with an isotropic g value 1.990 and an isotropic hyperfine constant 151A = -31.0 × 10-4. The principal axes of the zero field splitting tensor in the mirror plane are rotated by an angle of 18° with respect to the crystallographic axes, as expected for the Ba2+ site. A powder EPR spectrum was also recorded and successfully simulated using the single-crystal EPR data. Its close similarity with the EPR spectra in fluorobromozirconate glass ceramics doped with Eu2+ shows that indeed crystalline BaBr2:Eu2+ precipitates are present in such glass ceramics.

Original languageEnglish
Pages (from-to)2331-2338
Number of pages8
JournalJournal of Physics Condensed Matter
Volume13
Issue number10
DOIs
Publication statusPublished - Mar 12 2001

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Glass ceramics
Paramagnetic resonance
electron paramagnetic resonance
ceramics
Crystals
glass
crystals
Single crystals
Precipitates
precipitates
single crystals
Crystalline materials
Phosphors
Powders
phosphors
Tensors
Mirrors
tensors
mirrors
X rays

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

EPR of Eu2+ in BaBr2 crystals and fluorobromozirconate glass ceramics. / Schweizer, S.; Corradi, G.; Edgar, A.; Spaeth, J. M.

In: Journal of Physics Condensed Matter, Vol. 13, No. 10, 12.03.2001, p. 2331-2338.

Research output: Contribution to journalArticle

Schweizer, S. ; Corradi, G. ; Edgar, A. ; Spaeth, J. M. / EPR of Eu2+ in BaBr2 crystals and fluorobromozirconate glass ceramics. In: Journal of Physics Condensed Matter. 2001 ; Vol. 13, No. 10. pp. 2331-2338.
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