Journal of Materials Science

, Volume 32, Issue 21, pp 5737–5741 | Cite as

Effects of dye doping on ferroelectricity in vinylidene fluoride and trifluoroethylene copolymers



The effects of dye doping on ferroelectricity in vinylidene fluoride and trifluoroethylene copolymers have been investigated mainly through dielectric and switching measurements. Large dielectric relaxation, which cannot be explained by dipole fluctuations of individual chain molecules around their axes, was observed in the dye-doped copolymer films. With increasing dye content in copolymers, the relaxation times increase, and the dielectric relaxation strength becomes large. However, the switching times and the switching curve are nearly independent of dye content. These results can be explained if we assume that dye is doped into noncrystalline regions but not into crystalline regions, and forms a long and slender phase boundary in which the dye content is high.


Switching Time Complex Permittivity Crystalline Region Vinylidene Fluoride Switching Characteristic 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    T. T. WANG, J. M. HERBERT and A. M. GLASS, “The Applications of Ferroelectric Polymers” (Blackie, Glasgow, 1988).Google Scholar
  2. 2.
    T. FURUKAWA, Phase Transit. 18 (1989) 143.CrossRefGoogle Scholar
  3. 3.
    H. KAWAI, Jpn J. Appl. Phys. 8 (1969) 975.CrossRefGoogle Scholar
  4. 4.
    M. E. LINES and A. M. GLASS, “Principles and Applications of Ferroelectrics and Related Materials” (Clarendon Press, Oxford, 1977).Google Scholar
  5. 5.
    T. YAGI, M. TATEMOTO and J. SAKO, Polym. J. 12 (1980) 209.CrossRefGoogle Scholar
  6. 6.
    T. YAMADA, T. UEDA and T. KITAYAMA, J. Appl. Phys. 52 (1981) 948.CrossRefGoogle Scholar
  7. 7.
    Y. TAJITSU, A. CHIBA, T. FURUKAWA, M. DATE and E. FUKADA, Appl. Phys. Lett. 36 (1980) 286.CrossRefGoogle Scholar
  8. 8.
    M. DATE, “Ferroelectric Polymers”, edited by H. S. Nalwa (Marcel Decker, New York, 1995) p. 771.Google Scholar
  9. 9.
    M. DATE, T. FURUKAWA, T. YAMAGUCHI, A. KOJIMA and I. SHIBATA, IEEE Trans. Electr. Insul. EI-24 (1989) 537.CrossRefGoogle Scholar
  10. 10.
    K. KIMURA and H. OHIGASHI, Jpn J. Appl. Phys. 25 (1986) 383.CrossRefGoogle Scholar
  11. 11.
    Y. TAJITSU, ibid. 34 (1995) 5418.CrossRefGoogle Scholar
  12. 12.
    S. OKA and O. NAKADA, “Theory of Solid State Dielectrics” (Iwanami, Tokyo, 1964) in Japanese.Google Scholar
  13. 13.
    H. OHIGASHI and T. HATTORI, Ferroelectrics 171 (1995) 11.CrossRefGoogle Scholar
  14. 14.
    Y. TAJITSU, H. OGURA, A. CHIBA and T. FURUKAWA, Jpn J. Appl. Phys. 26 (1987) 554.CrossRefGoogle Scholar
  15. 15.
    T. FURUKAWA, Y. TAJITSU, X. ZHANG and G. E. JOHNSON, Ferroelectrics 135 (1992) 401.CrossRefGoogle Scholar

Copyright information

© Chapman and Hall 1997

Authors and Affiliations

    • 1
  1. 1.Department of Materials Science and Engineering, Faculty of EngineeringYamagata UniversityYamagataJapan

Personalised recommendations