Electric measurements with constant current: a practical method for characterizing dielectric films

José A. Giacometti, Célio Wisniewski, Paulo António Martins Ferreira Ribeiro, Walterley A. Moura

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

This article assesses the use of the constant current (CC) method for characterizing dielectric films. The method is based on charging the sample with a constant current (current stress) and measuring the corresponding voltage rise under the closed circuit condition. Our article shows that the CC method is an alternative to the constant voltage stressing method to study the electric properties of nonpolar, ferroelectric, and polar polymers. The method was tested by determining the dielectric constant of polytetrafluoroethylene, and investigating the electric conduction in poly(ethylene terephthalate). For the ferroelectric polymer poly(vinylidene fluoride), it is shown that hysteresis loops and the dependence of the ferroelectric polarization on the electric field can be obtained. (C) 2001 American Institute of Physics.
Original languageEnglish
Pages (from-to)4223-4227
Number of pages5
JournalReview of Scientific Instruments
Volume72
Issue number11
DOIs
Publication statusPublished - Nov 2001

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