Donor-doping effect in BaTiO3 ceramics using positron annihilation spectroscopy

被引：10
|
作者：
Mohsen, M [1 ]
Krause-Rehberg, R
Massoud, AM
Langhammer, HT
机构：
[1] Ain Shams Univ, Dept Phys, Fac Sci, Cairo 11566, Egypt
[2] Univ Halle Wittenberg, Fachbereich Phys, D-06099 Halle An Der Saale, Germany
来源：
RADIATION PHYSICS AND CHEMISTRY | 2003年 / 68卷 / 3-4期
关键词：
Barium Titanate; donor doping; defect chemistry; positron lifetime spectroscopy;
D O I：
10.1016/S0969-806X(03)00228-7
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：
Temperature-dependent measurements using positron lifetime spectroscopy (PLS) were carried out to study various defects in polycrystalline donor doped BaTiO3 (BT) samples. Annealing under different donor-doping level of La and Y were performed. At high doping level, it was found that with increasing doping level the average lifetime increases. This is attributed to the interplay of complexes containing oxygen vacancies V-O and other vacancies, such as V-Ba, V-Ti as well as grain boundaries. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：549 / 552
页数：4
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