Molecular ferroelectricity of vinylidene fluoride oligomer investigated by atomic force microscopy

Kei Noda, Kenji Ishida, Atsushi Kubono, Toshihisa Horiuchi, Hirofumi Yamada, Kazumi Matsushige

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Nanometer-scale electrical properties of local ferroelectric domains formed in thin films of newly synthesized vinylidene fluoride (VDF) oligomer were investigated by atomic force microscopy (AFM). Local poling and observation of the piezoelectric response revealed that the polarized domains were reversibly formed and erased in a nanometer-thick film by applying dc or pulse voltages between the electrically conductive AFM tip and the bottom electrode. The formed domain size depends on the pulse poling conditions and increases when the magnitude and the duration of a pulse voltage are increased. A local domain with a diameter of 65 nm was successfully created. The results in this work are comparable to those of previous studies performed on ferroelectric polymer thin films, suggesting that this material is one of the promising candidates for ferroelectric applications such as high-density data storages, and for molecular controls of ferroelectric properties.

Original languageEnglish
Pages (from-to)4361-4364
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume40
Issue number6 B
DOIs
Publication statusPublished - 2001 Jun

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Keywords

  • Local poling
  • Nanoscale ferroelectric domain
  • Piezoresponse
  • Polarization reversal
  • Vinylidene fluoride oligomer

ASJC Scopus subject areas

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

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