Electron paramagnetic resonance of Ce3+ in strontium-barium niobate

被引：29
|
作者：
Wingbermühle, J [1 ]
Meyer, M
Schirmer, OF
Pankrath, R
Kremer, RK
机构：
[1] Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany
[2] Max Planck Inst Festkorperforsch, D-70567 Stuttgart, Germany
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 18期
关键词：
D O I：
10.1088/0953-8984/12/18/312
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The EPR of Ce3+ in congruent SrXBa1-xNb2O6 (x = 0.61) is characterized by the orthorhombic g-tensor {0.89, 3.55, 0.54} with principal axes lying in the c-plane, tilted with respect to the a- and b-axes by 21.1 degrees: and along the c-axis. Ce3+ occupies a single crystallographic site in the crystal, leading to a unique EPR spectrum. The point symmetry of the Ce3+ position, C-1, is lower than that of the replaced alkaline-earth ions, C-4 or C-s. This is attributed to an off-centre movement of Ce3+. The Ce3+ signal decreases under illumination. No further EPR signal is detected to arise from the photoionization of Ce3+.
引用
收藏
页码：4277 / 4284
页数：8
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