Optical absorption and structure of impurity Ni$^{2+}$ center in tungstate-tellurite glass

Details Optical absorption and structure of impurity Ni$^{2+}$ center in tungstate-tellurite glass Optical absorption and structure of impurity Ni$^{2+}$ center in tungstate-tellurite glass

2011-01-19

arxiv.org/abs/1101.3704v1

V.G.Plotnichenko, V.O.Sokolov, G.E.Snopatin, M.F.Churbanov Optical absorption and structure of impurity Ni$^{2+}${} center in

Physics

Condensed Matter

Materials Science

Scientific paper

10.1016/j.jnoncrysol.2010.10.026

Absorption spectra of Ni$^{2+}$ ions in 22WO$_3$--78TeO$_2$ tungstate-tellurite glass were studied and Ni$^{2+}$ extinction coefficient spectral dependence was derived in the 450 -- 2700 nm wavelength range. Computer modeling of the glass structure proved Ni$^{2+}$ ions to be in trigonal-distorted octahedral environment in the tungstate-tellurite glass. Tanabe-Sugano diagram for such an environment was calculated and good description of the observed spectrum of Ni$^{2+}$ ion was obtained. Basing on both absorption spectral range width and the extinction coefficient, nickel should be considered among the most strongly absorbing impurities in the tellurite glasses.

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