Characterization of conduction in PZT thin films produced by laser ablation deposition
作者:
X. Chen,
A.I. Kingon,
L. Mantese,
O. Auciello,
K.Y. Hsieh,
期刊:
Integrated Ferroelectrics
(Taylor Available online 1993)
卷期:
Volume 3,
issue 4
页码: 355-363
ISSN:1058-4587
年代: 1993
DOI:10.1080/10584589308216691
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Both direct current (d.c.) and alternating current (a.c.) conductivity measurements were undertaken on lead zirconate titanate (PZT) films synthesized by laser ablation deposition. Direct current (I) displayed an initial time dependence of the form I ∝ t−γ(γ ∝ 0.5–1.0). The possible reasons for this time dependence are discussed. At lower temperatures, the a.c. electrical conductivity shows a frequency dependence of the form σ ∝ ω′ which is explained as electrical charge hopping. At higher temperatures, the d.c. component of electrical conductivity becomes dominant, and is accompanied by a strong low frequency dispersion of the dielectric constant. The results are compared to published data on conductivity in SrTiO3, and discussed in terms of the latest theories for dielectric response of materials.
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