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

Yuichiro Mabuchi; Takashi Nakajima; Takeo Furukawa; Soichiro Okamura

doi:10.1143/APEX.4.071501

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

Yuichiro Mabuchi, Takashi Nakajima, Takeo Furukawa, Soichiro Okamura

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-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 language	English
Article number	071501
Journal	Applied Physics Express
Volume	4
Issue number	7
DOIs	https://doi.org/10.1143/APEX.4.071501
Publication status	Published - 2011 Jul 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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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.",

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AU - Okamura, Soichiro

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

Abstract

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