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EPR and optical investigation of Europium doped Ba12F19Cl5

Rey, Julien M.
Published in Journal of Physics. Condensed Matter. 1999, vol. 11, no. 4-5, p. 7301-7309
Abstract Single crystals of the new host Ba12F19Cl5 doped with Eu2+ were grown and studied by electron paramagnetic resonance (EPR) and luminescence emission spectroscopy. Three different Eu2+ sites were observed. Two of them had orthorhombic point symmetry while the last one was monoclinic. Physico-chemical and symmetry arguments allowed us to establish correspondence between the different Eu2+ centres and the host cation lattice sites. All three centres presented in their ground state important crystal field splitting. The 80 K luminescence emission spectrum consisted of one broad unsymmetrical f-d band peaking at 22 700 cm-1. No 4f-4f transitions of the Eu2+ ion were observed between room temperature and 80 K.
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Research group Groupe Bill
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REY, Julien M. et al. EPR and optical investigation of Europium doped Ba12F19Cl5. In: Journal of Physics. Condensed Matter, 1999, vol. 11, n° 4-5, p. 7301-7309. https://archive-ouverte.unige.ch/unige:2750

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Deposited on : 2009-09-21

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