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English

Europium doped BaMgF4, an EPR and optical investigation

Published inJournal of alloys and compounds, vol. 268, no. 4, p. 60-65
Publication date1998
Abstract

Eu2+ was introduced into pure and oxygen codoped BaMgF4 single crystals. A detailed EPR study of this ion (S=7/2) was realized on both types of systems. The result is that only one spectrum was observed involving a strong crystal field. The associated site symmetry of the impurity is Cs. It occupies very closely a Barium lattice site as was established by correlating the EPR results with those of a refined X-ray structure analysis on a Ba0.8Eu0.2MgF4 single crystal realized in our laboratory. The oxygen codoped crystals exhibited this same Eu2+ EPR spectrum (the only one). Optical emission and excitation experiments were performed between 13 000 and 53 000 cm−1. The results due to the Eu2+ impurity are given and discussed qualitatively within the 4f7left right double arrow4f65d1 scheme.

Keywords
  • EPR
  • Luminescence
  • BaMgF4
  • Hydrolysis
Research group
Citation (ISO format)
REY, Julien M. et al. Europium doped BaMgF4, an EPR and optical investigation. In: Journal of alloys and compounds, 1998, vol. 268, n° 4, p. 60–65. doi: 10.1016/S0925-8388(97)00606-3
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ISSN of the journal0925-8388
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