Ferroelectricity in ultrathin films of polyvinylidene fluoride and its copolymer

T. Nakajima, Y. Mabuchi, T. Morimoto, T. Furukawa, S. Okamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We succeeded in observing the ferroelectric polarization reversal of VDF/TrFE thin films down to 9.7 nm in thickness. Reduced thickness below 56 nm induced marked reduction in P r and ε r0. These results indicate the existence of the surface dead layer in VDF/TrFE which induces the polarization switch back due to the generated depolarization field. To fabricate a thin PVDF film with smooth surface is more difficult owing to the coexistence of the different polymorphs. We obtained uniform PVDF film consisting of the spherical grains by spin-coating with solution temperature of 120 °C. After the application of electric pulses to enhance the polarization, clear polarization reversal with P r of 0.06 C/m 2 was observed for 60-nm-thick PVDF film.

Original languageEnglish
Title of host publication2011 - 14th International Symposium on Electrets, ISE 2011
Pages169-170
Number of pages2
DOIs
Publication statusPublished - 2011 Dec 1
Event2011 IEEE 14th International Symposium on Electrets, ISE 2011 - Montpellier, France
Duration: 2011 Aug 282011 Aug 31

Publication series

NameProceedings - International Symposium on Electrets

Other

Other2011 IEEE 14th International Symposium on Electrets, ISE 2011
Country/TerritoryFrance
CityMontpellier
Period11/8/2811/8/31

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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