Scientific article
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EPR and optical investigation of Europium doped Ba12F19Cl5

Published inJournal of physics. Condensed matter, vol. 11, no. 38, p. 7301-7309
Publication date1999

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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REY, Julien M. et al. EPR and optical investigation of Europium doped Ba<sub>12</sub>F<sub>19</sub>Cl<sub>5</sub>. In: Journal of physics. Condensed matter, 1999, vol. 11, n° 38, p. 7301–7309. doi: 10.1088/0953-8984/11/38/309
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ISSN of the journal0953-8984

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