ZANANE, Hayat; VELÁZQUEZ, Matias; DENUX, Dominique; GOLDNER, Philippe; FERRIER, Alban; KERMAOUI, Aïcha; KELLOU, Hamid; LAHAYE, Michel; BUFFIERE, Sonia; WEILL, François

doi:10.1016/j.optmat.2019.01.066

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ZANANE, Hayat
Laboratoire d’Electronique Quantique [USTHB - Alger] [LEQ]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

VELÁZQUEZ, Matias
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DENUX, Dominique
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Optical Materials. 2019, vol. 90, p. 108-117

Elsevier

Résumé en anglais

A new 30 GeO2-30 TeO2-15 ZnO-10 Na2CO3-10 CaF2-3 La2O3-2 YbF3 glass composition was synthesized and submitted to several heat treatments to provoke nanocrystallization in its bulk. The formation of nanocrystallites was evidenced by high resolution transmission electron microscopy and X-ray diffraction, and their nature and size was characterized. The spectroscopic and magnetic properties of the Yb3+ ions dissolved in the glass and, presumably, in the nanocrystallites, were investigated by absorption and emission spectroscopies (including anti-Stokes emissions from Tm3+ and Er3+ impurities), fluorescence transients and magnetic susceptibility measurements. It was found that the Yb3+ ions experimental lifetime and average effective magnetic moment, as well as Tm3+ and Er3+ ions anti-Stokes emission intensities, increase with increasing crystallization state of the initial glass.< Réduire

Mots clés en anglais

Glass materials

Yb3+ ion spectroscopy

Rare-earth materials

Optical glass ceramics

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Yb3+- and CaF2 nanocrystallites-containing oxyfluorogermanotellurite glass-ceramics

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