Studies of dielectric and switching characteristics in VDF/TrFE copolymer thin films by means of pulse-train measurements

Takashi Nakajima, Yoshiyuki Takahashi, Takeo Furukawa

Research output: Contribution to conferencePaper

Abstract

The polarization reversal of ferroelectric material proceeds through the nucleation and growth process of reversed domains. In order to study the polarization reversal process in the VDF/TrFE thin films, we applied a train of short voltage pulses (ton=0.2μs ∼50μs) to the sample and measured the charge response as a function of time. The switching time τs becomes longer as the pulse length ton becomes shorter. Even when we applied a very short pulse ton=0.2μs with which almost no polarization reversal proceeds at the early process, the polarization reversal eventually occurs. Removing the dielectric contribution from the observed charge response extracts the time evolution of intrinsic ferroelectric component. It clearly demonstrates the transition from the nucleation process to the growth process during polarization reversal. We will discuss the kinetic process of polarization reversal with a model based on the results of the pulse-train method.

Original languageEnglish
Number of pages1
Publication statusPublished - 2005 Dec 1
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: 2005 May 252005 May 27

Other

Other54th SPSJ Annual Meeting 2005
CountryJapan
CityYokohama
Period05/5/2505/5/27

Keywords

  • Ferroelectric polymer
  • Kinetics
  • Pulse
  • Switching
  • Thin film
  • Vinylidene fluoride

ASJC Scopus subject areas

  • Engineering(all)

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    Nakajima, T., Takahashi, Y., & Furukawa, T. (2005). Studies of dielectric and switching characteristics in VDF/TrFE copolymer thin films by means of pulse-train measurements. Paper presented at 54th SPSJ Annual Meeting 2005, Yokohama, Japan.