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

Hayat Zanane (1, 2) , Matias Velázquez (2) , Dominique Denux (2) , Philippe Goldner (3) , Alban Ferrier (4, 5) , Aïcha Kermaoui (1) , Hamid Kellou (1) , Michel Lahaye (6) , Sonia Buffiere (2) , François Weill (2)

1 LEQ - Laboratoire d’Electronique Quantique [USTHB - Alger]
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 ENSCP - Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL
4 SU - Sorbonne Université
5 IRCP - Institut de Recherche de Chimie Paris
6 PLACAMAT - Plateforme Aquitaine de Caractérisation des Matériaux

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.

Mots clés: Glass materials; Yb3+ ion spectroscopy; Rare-earth materials; Optical glass ceramics

Domaines: Matériaux

Hayat Zanane, Matias Velázquez, Dominique Denux, Philippe Goldner, Alban Ferrier, et al.. Yb3+- and CaF2 nanocrystallites-containing oxyfluorogermanotellurite glass-ceramics. Optical Materials, 2019, 90, pp.108-117. ⟨10.1016/j.optmat.2019.01.066⟩. ⟨hal-02072398⟩