Polarization and hysteresis in low resistivity ferroelectric composites

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Abstract

A compensating technique suitable for measuring the polarization and hysteresis in ferroelectric materials with low resistivity is reported. In this method, three different poling voltages waveforms are successively applied to a sample while the current i, is measured. These are: a sinusoidal, a positively rectified and a negatively rectified sinusoidal voltages. The polarization hysteresis loop is then computed through the integration of the difference between the current obtained during the full sinusoidal voltage loop (i.e. it) and the sum of the other two currents (i+ + i-. In this paper we use this method to determine the remanent polarization and coercive field in a ferroelectric composite of calcium modified lead titanate (PTCa), of a low resistivity formulation, and a copolymer of polyvinylidene fluoride (i.e. P(VDF/TrFE)) as a function of the temperature and field.

Original languageEnglish
Pages (from-to)121-130
Number of pages10
JournalFerroelectrics
Volume198
Issue number1-4
DOIs
Publication statusPublished - 1997

Keywords

  • Ferroelectric composites
  • Polarization hysteresis
  • Polarization switching
  • Sawyer-tower circuits

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