EPR investigations on europium(II)-doped barium aluminate

被引：22
|
作者：
Nakamura, T
Kaiya, K
Takahashi, N
Matsuzawa, T
Rowlands, CC
Beltrán-López, V
Smith, GM
Riedi, PC
机构：
[1] Shizuoka Univ, Fac Engn, Dept Mat Sci & Technol, Hamamatsu, Shizuoka 432, Japan
[2] Nemoto & Co Ltd, Ctr Res & Dev, Tokyo 168, Japan
[3] Univ Wales, Dept Chem, EPSRC Natl ENDOR Ctr, Cardiff CF1 3TB, S Glam, Wales
[4] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico
[5] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1999年 / 1卷 / 17期
关键词：
D O I：
10.1039/a903385h
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
High frequency EPR spectra of europium(II)-doped BaAl2O4 powder phosphor have been analysed. Spectral simulation was carried out by a Fourier transform Monte Carlo method using an equation derived from the second-order perturbation of the energy levels for S=7/2. It is found that the spectra can best be interpreted in terms of europium(ii) ions in two different sites. One quarter of the europium(ii) ions are located in a site with a \D\ of 0.345 cm(-1), and the remaining europium(ii) ions are in a site with a \D\ of 1.08 cm(-1). Estimated values of \E\ are equal to 1/3 \D\ and are independent of the sites. From the comparison of these EPR parameters with the XRD crystallographic data we deduce that when europium is substituted for barium its surroundings give rise to rearrangement.
引用
收藏
页码：4011 / 4014
页数：4
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