TEMPERATURE-DEPENDENCE OF HOMOGENEOUS LINE-WIDTH OF EU3+ IN BETA'-ALUMINA STUDIED BY FLUORESCENCE LINE NARROWING SPECTROSCOPY

被引:4
作者
YUGAMI, H
WATANABE, T
ARASHI, H
HATTORI, T
ISHIGAME, M
机构
[1] Research Institute for Scientific Measurements, Tohoku University, Aoba-ku, Sendai, 980
关键词
D O I
10.1016/0022-2313(93)90023-G
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We have measured the temperature dependence of the homogeneous spectral line width Gamma(h) of Eu3+ in beta('')-alumina, which is a typical superionic conductor, using fluorescence line narrowing spectroscopy, and have discussed dephasing mechanisms of luminescence from Eu3+ ions in this system. Due to the structural disorder in the two-dimensional conduction planes of beta('')-alumina crystals, the temperature dependences of Gamma(h) Eu3+ ion in both Beevers-Ross (BR) and mid-oxygen (mO) sites are essentially the same as those previously observed in glassy materials. However, the Eu3+ concentration as well as the temperature dependences of Gamma(h) of the Eu3+ ion in the mO site are quite different from those in the BR site. This fact strongly indicates that the dominant dephasing mechanisms of Gamma(h) of Eu3+ ion in these two sites are different from each other. This result is attributed to the intermediate nature of beta('')-alumina between ordered and disordered materials.
引用
收藏
页码:277 / 285
页数:9
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