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Peculiarities of As-S glass structure doped with ytterbium

机译：掺As的As-S玻璃结构的特殊性

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Chalcogenide glasses As_2S_3 doped with ytterbium were investigated by Raman spectroscopy in order study the structural changes accompanying the incorporation of impurity metal ions in the host glass structure. Doping of As_2S_3 glasses with small amount of Yb ions, up to 1 % wt., only slightly affect the short-range order structure of the host matrix. For Yb concentration more than 1 % wt. the sharp increase of presence of the additional bands characteristic for the vibrations non-stoichiometric molecular fragments which contain homopolar S-S and As-As bonds was observed. Such changes correlate with data on the thermal properties of such glasses where Tg values were sharply decreased if Yb concentration was more than 1 % wt. No additional bands besides characteristic for As_2S_3 stoichiometric and non-stoichiometric structural units were found. The main observed effect under the introduction of ytterbium into As_2S_3 is the change of relative concentration of the main and non-stoichiometric structural units characteristic for As_2S_3 glasses.
机译：用拉曼光谱法研究了掺的硫族化物玻璃As_2S_3，以研究伴随杂质金属离子掺入主体玻璃结构的结构变化。掺入少量Yb离子（最高1 wt％）的As_2S_3玻璃只会轻微影响基质的短程有序结构。对于Yb浓度大于1重量％。观察到，振动的非化学计量分子片段中含有同质S-S和As-As键的附加谱带的存在急剧增加。此类变化与此类玻璃的热性能数据相关，其中，如果Yb浓度超过1％wt，Tg值将急剧下降。除了As_2S_3化学计量和非化学计量结构单元的特征外，没有发现其他带。将As引入As_2S_3时，主要观察到的作用是改变As_2S_3玻璃的主要和非化学计量结构单元的相对浓度。

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