Structure, thermopower and electrical transport properties of La2/3TiO3-δ

被引：9
作者：
Jung, WH [1 ]
机构：
[1] HoWon Univ, Dept Elect, Chon Buk, South Korea
来源：
JOURNAL OF MATERIALS SCIENCE LETTERS | 1999年 / 18卷 / 14期
关键词：
D O I：
10.1023/A:1006642326101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structural, thermopower and electrical transport properties of members belonging to the perovskite family, La2/3TiO3-δ, have been investigated as a function of oxygen-deficient concentration (δ). It was found that the crystal structure of these materials strongly depended on the oxygen-deficient concentration, the structure changed from orthorhombic double perovskite at δ = 0.057, tetragonal double perovskite at δ = 0.071 and pseudo-cubic perovskite at δ = 0.161. Negative thermopower was observed and was found to obey an equation of S = A+BT. The temperature dependence of S strongly indicated that the charge carrier responsible for electrical conduction in La2/3TiO3-δ is small polaron of electron.
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页码：1181 / 1183
页数：3
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