Analogue and digital lock-in techniques for very-low-frequency impedance spectroscopy

被引：15

作者：

Albertini, A

Kleemann, W

机构：

[1] Lab. für Angewandte Physik, Gerhard-Mercator-Univ. Duisburg

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 1997年 / 8卷 / 06期

关键词：

D O I：

10.1088/0957-0233/8/6/014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Analogue and digital lock-in techniques are proposed for very-low-frequency impedance spectroscopy, <(epsilon)over tilde> = epsilon' - i epsilon " versus f, involving modest instrumental effort, but achieving very high resolution, Delta(epsilon "/epsilon') < 10(-3), in the frequency range 10(-3) less than or equal to f less than or equal to 10(4) Hz. Systematic errors are eliminated after careful network analysis. As an example, some data observed on the relaxor system Sr0.998Ca0.002TiO3 (SCT) at low temperatures, 1.5 less than or equal to r less than or equal to 15 K, are presented. Its dielectric non-linearity and its transition into a frozen domain state at T-g = 3.8 K are briefly discussed.

引用

页码：666 / 672

页数：7

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