DC ELECTRICAL-RESISTIVITY OF NB-DOPED BATIO3 AND EPR MEASUREMENTS

被引:55
作者
GILLOT, C [1 ]
MICHENAUD, JP [1 ]
MAGLIONE, M [1 ]
JANNOT, B [1 ]
机构
[1] UNIV BOURGOGNE,PHYS SOLIDE LAB,F-21004 DIJON,FRANCE
关键词
D O I
10.1016/0038-1098(92)90434-B
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
DC electrical resistivity measurements along the c-axis of Nb-doped BaTiO3 single crystals are presented in a wide range of temperature, covering the four phases, with special attention to the rhomboedral one. The temperature dependence of the conductivity leads to convincing arguments in favour of a polaronic mechanism. Below the orthorhombic-rhomboedral transition point, a strong increase of the resistivity is observed. The correlation of this behavior with EPR analysis in the same temperature range, is consistent with a sharp trapping of the ''free'' electrons, when the temperature decreases.
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页码:1033 / 1038
页数:6
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