Electric-field-induced polarization enhancement of vinylidene fluoride/trifluoroethylene copolymer ultrathin films

Yuichiro Mabuchi, Takashi Nakajima, Takeo Furukawa, Soichiro Okamura

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We investigated the polarization enhancement in 60-nm-thick vinylidene fluoride/trifluoroethylene (VDF/TrFE) films without thermal annealing by applying repeated bipolar electric pulses. The remnant polarization was 8.4mC/m2 in as-spin-coated films and increased to up to 45mC/m 2 when 105 pulses were applied. Although the remnant polarization was half and the coercive field twice those of annealed films, the electrically treated film had a markedly smoother surface than the annealed film. Finally, a 15-nm-thick ferroelectric VDF/TrFE film with low conductivity was fabricated by electric treatment; annealed films with the same thickness experienced a severe short-circuit problem originating from the surface roughness.

Original languageEnglish
Article number071501
JournalApplied Physics Express
Volume4
Issue number7
DOIs
Publication statusPublished - 2011 Jul 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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