Light-induced charge transport in photorefractive BaTiO3:Fe and Ba0.77Ca0.23TiO3:Fe

被引：9
|
作者：
Mazur, A [1 ]
Veber, C [1 ]
Schirmer, OF [1 ]
Kuper, C [1 ]
Hesse, H [1 ]
机构：
[1] Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany
来源：
RADIATION EFFECTS AND DEFECTS IN SOLIDS | 1999年 / 150卷 / 1-4期
关键词：
BaTiO3; Ba1-xCaxTiO3; EPR; optical absorption; perovskite and photorefractive materials;
D O I：
10.1080/10420159908226244
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Photorefractive barium titanate and barium-calcium titanate crystals with the congruently melting composition (Ba0.77Ca0.23TiO3) doped with iron are annealed in a hydrogen atmosphere at various temperatures. The samples are studied with electron paramagnetic resonance (EPR) and optical absorption both performed separately as well as simultaneously before and after illumination. The samples are electron conductive and the charge Fe2+/3+ at room temperature ir governed by only one level identified by photo-EPR as The optical absorption of Fe2+ in BaTiO3:Fe is found to be at 2.1 eV and in (Ba0.77Ca0.23TiO3) Fe at 1.9 eV.
引用
收藏
页码：281 / 286
页数：6
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