Geodesic
Spectroscopic and generation characteristics of $\mathrm{NaLaGd}$ double tungstates and molibdates doped with $\mathrm{Nd}^{3+}$ and $\mathrm{Tm}^{3+}$ ions
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 155 (2013) no. 1, pp. 131-142

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In this paper, we report the results of the study of the spectroscopic properties of $\mathrm{NaLa_{1/2}Gd_{1/2}(WO_4)_2:Nd}$ crystals and $\mathrm{Tm}^{3+}$-doped mixed $\mathrm{NaLaGd}$ double tungstates (molybdates) with scheelite structure. We analyzed the low-temperature absorption spectra of $\mathrm{NaLa_{1/2}Gd_{1/2}(WO_4)_2:Nd}$ crystals and compared the oscillator strengths of the hypersensitive transition $\mathrm{^4I_{9/2}\to{}^4G_{5/2}+{}^2G_{7/2}}$ of $\mathrm{Nd}^{3+}$ ions in $\mathrm{NaLa_{1/2}Gd_{1/2}(WO_4)_2:Nd}$ crystals and the oscillator strengths of the hypersensitive transitions $\mathrm{^3H_6\to{}^3H_4}$, $\mathrm{^3H_6\to{}^3F_4}$ of $\mathrm{Tm}^{3+}$ ions in the crystals of mixed NaLaGd double tungstates (molybdates) having scheelite structure with the analogous values in other oxide crystals with the corresponding activators. We made a conclusion about the reduction of the point symmetry of rare-earth ions in these crystals. We also present the results of the experiment on laser generation in the crystals of $\mathrm{Tm}^{3+}$-doped mixed NaLaGd double tungstates (molybdates) with scheelite structure.
Keywords: crystal, rare-earth ion, absorption spectrum, luminescence spectrum, laser generation. 
@article{UZKU_2013_155_1_a18,
     author = {P. A. Ryabochkina and S. A. Antoshkina and F. A. Bolschikov and S. N. Ushakov and S. A. Klimin and D. A. Lis and K. A. Subbotin and E. V. Zharikov},
     title = {Spectroscopic and generation characteristics of $\mathrm{NaLaGd}$ double tungstates and molibdates doped with $\mathrm{Nd}^{3+}$ and $\mathrm{Tm}^{3+}$ ions},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {131--142},
     publisher = {mathdoc},
     volume = {155},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2013_155_1_a18/}
}
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%A K. A. Subbotin
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P. A. Ryabochkina; S. A. Antoshkina; F. A. Bolschikov; S. N. Ushakov; S. A. Klimin; D. A. Lis; K. A. Subbotin; E. V. Zharikov. Spectroscopic and generation characteristics of $\mathrm{NaLaGd}$ double tungstates and molibdates doped with $\mathrm{Nd}^{3+}$ and $\mathrm{Tm}^{3+}$ ions. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 155 (2013) no. 1, pp. 131-142. http://geodesic.mathdoc.fr/item/UZKU_2013_155_1_a18/