Matrix effect on local structure surrounding Yb3+and spontaneous emission probability in oxide glasses
Matrix effect on local structure surrounding Yb3+and spontaneous emission probability in oxide glasses
复制标题
氧化物玻璃中 Yb3 周围局部结构的基体效应和自发发射概率
DOI：
10.1016/s1468-6996(02)00002-5
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
K. Morinaga
中科院分区：
文献类型：
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作者：
T. Murata;K. Mazeno;K. Morinaga
用扩展X射线吸收精细结构方法研究了硅酸盐、硼酸盐、磷酸盐和镓酸盐玻璃中Yb 3+离子的局域结构。Yb 3+离子在硅酸盐、硼酸盐和磷酸盐玻璃中的局域结构与Er 3+离子相似。Yb 3+离子不占据网络结构位置，而是位于网络的末端区域或网络之间的区域。另一方面，Yb 3+离子取代了K2 O-Ga 2 O3-Nb 2 O 5玻璃中复杂阴离子结构单元中的Ga 3+位置。我们将氧化物玻璃中Yb 3+离子周围的局域结构分为两种类型：前者为间隙型，后者为替代型。根据这两种类型讨论了氧化物玻璃中Yb 3+的2F 5/2→ 2F 7/2跃迁的自发辐射几率与Yb 3+局域结构的关系。
Extended X-ray absorption fine structure measurements have been performed on Yb 3+ in silicate, borate, phosphate, and gallate glasses in order to investigate the local structures surrounding Yb 3+. The local structures of Yb 3+ ions in silicate, borate, and phosphate glasses were similar to those of Er 3+ ions. Yb 3+ ions do not occupy the network structural sites, but sit around the terminal region of the network or the region between the networks in these glasses. On the other hand, Yb 3+ ions substitute the Ga 3+ sites in complex anion structural units of the K 2 O–Ga 2 O 3–Nb 2 O 5 glasses. We classified the local structures surrounding Yb 3+ ions in oxide glasses into two types: the former and the latter are interstitial and substitutive types, respectively. The relationship between the spontaneous emission probability for 2 F 5/2→ 2 F 7/2 transition of Yb 3+ and the local structure of Yb 3+ in oxide glasses are discussed in terms of these two types.