Variable-range-hopping conduction and dielectric relaxation in disordered Sr0.97(Ti1-xFex)O3-δ

被引:67
作者
Ang, C [1 ]
Jurado, JR
Yu, Z
Colomer, MT
Frade, JR
Baptista, JL
机构
[1] Univ Aveiro, Dept Ceram & Glass Engn, P-3800 Aveiro, Portugal
[2] CSIC, Inst Ceram & Glasses, Madrid 28500, Spain
[3] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
来源
PHYSICAL REVIEW B | 1998年 / 57卷 / 19期
关键词
D O I
10.1103/PhysRevB.57.11858
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Conduction and dielectric behavior of Sr-0.97(Ti1-xFex)O3-delta solid solutions were studied. The temperature dependence of the dc conductivity with sigma proportional to A exp(-BT1/4) obtained, indicated a variable-range hopping mechanism. A low-frequency dielectric relaxation was also observed. The activation energy for the variable-range hopping conduction is slightly higher than that for dielectric relaxation, suggesting that the dielectric relaxation is due to the trap-controlled ac conduction. [S0163-1829(98)05819-6].
引用
收藏
页码:11858 / 11861
页数:4
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