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Europium doped BaMgF4, an EPR and optical investigation

Rey, Julien M.
Published in Journal of alloys and compounds. 1998, vol. 268, no. 4, p. 60-65
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 EPRLuminescenceBaMgF4Hydrolysis
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Research group Groupe Bill
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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 https://archive-ouverte.unige.ch/unige:3533

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Deposited on : 2009-10-02

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