Fatigue in sol-gel derived barium titanate films

被引:52
作者
Sharma, HB [1 ]
Sarma, HNK
Mansingh, A
机构
[1] Manipur Univ, Dept Phys, Imphal 795003, Manipur, India
[2] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
关键词
D O I
10.1063/1.369453
中图分类号
O59 [应用物理学];
学科分类号
摘要
The effect of fatigue on the electrical properties of sol-gel derived ferroelectric barium titanate (BaTiO3) thin films have been investigated. At room temperature, the resistivity, breakdown field, dielectric constant (epsilon), and loss tangent (tan delta) decreases after fatigue while the coercive field increases. Fatigue also influences the dielectric properties of the film at high temperatures. The sharpness and magnitude of the peak in the dielectric constant at the transition temperature decreases after fatigue. The loss tangent of the virgin film showed a peak at the transition temperature while it is absent in the case of the fatigue film. The phenomena are explained in terms of (i) the accumulation of point charge defect, (ii) the pinning of domain wall mobility, and (iii) the space charge layer models of fatigue. (C) 1999 American Institute of Physics. [S0021-8979(98)04523-X].
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页码:341 / 346
页数:6
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